Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 2© Commonwealth of Australia and the States and
Territories of Australia 2022, published by the Australian Building Codes
Board
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By accessing or using this publication, you agree to the following:
While care has been taken in the preparation of this publication, it may not be complete or up-to-date. You can ensure
that you are using a complete and up-to-date version by checking the Australian Building Codes Board website
(abcb.gov.au).
The Australian Building Codes Board, the Commonwealth of Australia and States and Territories of Australia do not
accept any liability, including liability for negligence, for any loss (howsoever caused), damage, injury, expense or cost
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This publication is not legal or professional advice. Persons rely upon this publication entirely at their own risk and
must take responsibility for assessing the relevance and accuracy of the information in relation to their par ticular
circumstances.Copyright and Licence Notice
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 3
Preface
Copyright and Licence Notice ...................................................................................... 2
Introduction to the National Construction Code (NCC) .............................................. 6
Introduction to NCC Volume Three .............................................................................. 8
List of NCC Specifications ........................................................................................... 9
History of adoption of NCC Volume Three ................................................................. 11
List of amendments - NCC 2022 Volume Three ........................................................ 12
Section A Governing requirements
Part A1 Interpreting the NCC .................................................................................................. 29
Part A2 Compliance with the NCC .......................................................................................... 32
Part A3 Application of the NCC in States and Territories ...................................................... 36
Part A4 Referenced documents .............................................................................................. 37
Part A5 Documentation of design and construction ............................................................. 39
Part A6 Building classification ................................................................................................ 46
Part A7 United buildings .......................................................................................................... 58
Specification 1 Fire-r esistance of building elements ......................................................................... 60
Specification 2 Descriptions of elements referred to in Specification 1 ........................................... 66
Specification 3 Fire hazard properties ................................................................................................ 72
Section B Water services
Part B1 Cold water services .................................................................................................... 77
Part B2 Heated water services ............................................................................................... 83
Part B3 Non -drinking wat er services ..................................................................................... 93
Part B4 Fire-fighting wat er services ...................................................................................... 98
Part B5 Cross -connection contr ol........................................................................................ 102
Part B6 Rainwater services ................................................................................................... 108
Part B7 Rainwater storage ..................................................................................................... 112
Specification 41 Cross -connection hazar ds....................................................................................... 115
Section C Sanitary plumbing and drainage systems
Part C1 Sanitary plumbing systems ...................................................................................... 122
Part C2 Sanitary drainage systems ....................................................................................... 133
Part C3 On-sit e wastewater management ........................................................................... 138
Section D Excessive noise
Part D1 Excessive noise ........................................................................................................ 143
Section E Facilities and ancillary additions
Part E1 Facilities .................................................................................................................... 147 General table of contents
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 4Schedule 1 Definitions
Abbreviations ............................................................................................................ 150
Symbols ..................................................................................................................... 152
Glossary .................................................................................................................... 154
Schedule 2 Referenced documents
Referenced documents ............................................................................................ 190
Schedule 3 Commonwealth of Australia
Footnote: Other legislation affecting buildings ...................................................... 208
Schedule 4 Australian Capital Territory
ACT Introduction ............................................................................................................... 214
ACT Footnote: Other legislation affecting water and plumbing systems ...................... 215
Schedule 5 New South Wales
Section A Governing requirements ........................................................................................... 218
Section B Water services .......................................................................................................... 219
NSW Part B4 Fire-fighting wat er ser vices .................................................................................... 222
Section C Sanitary plumbing and drainage systems ............................................................... 223
NSW Part C3 On-sit e wastewater management ........................................................................... 225
Schedule 1 Definitions ................................................................................................................. 226
Schedule 2 R
eferenced documents ............................................................................................ 228
NSW Footnote: Other legislation affecting buildings ...................................................... 230
Schedule 6 Northern Territory
NT Introduction .............................................................................................................. 233
Section C Sanitary plumbing and drainage systems ............................................................... 234
Section D Excessive noise ........................................................................................................ 235
Schedule 2 Referenced documents ............................................................................................ 236
NT Footnote: Other legislation affecting buildings ...................................................... 237
Schedule 7 Queensland
QLD Introduction .............................................................................................................. 240
Section B Water services .......................................................................................................... 241
QLD Part B4 Fire-fighting wat er ser vices .................................................................................... 242
Schedule 1 Definitions ................................................................................................................ 243
Schedule 2 Referenced documents ............................................................................................ 244
Schedule 8 South Australia
SA Introduction .............................................................................................................. 246
Section A Governing requirements .......................................................................................... 247
Section B Water services .......................................................................................................... 248
Section C Sanitary plumbing and drainage systems ............................................................... 252
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 5Schedule 1 Definitions ................................................................................................................ 254
Schedule 2 Referenced documents ............................................................................................ 256
SA Footnote: Other legislation affecting buildings ...................................................... 257
Schedule 9 Tasmania
TAS Introduction .............................................................................................................. 262
Section A Governing requirements .......................................................................................... 263
Section B Water services .......................................................................................................... 265
Section C Sanitary plumbing and drainage systems ............................................................... 270
TAS Part C4 On-sit e liquid trade waste systems ......................................................................... 272
Section E Facilities and ancillary additions ............................................................................. 288
TAS Part E2 Heating, cooling and ventilation systems ............................................................... 289
TAS Part E3 Stormwater - Roof drainage systems ...................................................................... 291
TAS Part E4 Stormwater surface and sub -sur face drainage systems ...................................... 294
Schedule 1 Definitions ................................................................................................................ 296
Schedule 2 Referenced documents ............................................................................................ 297
TAS Footnote: Other legislation affecting buildings ....................................................... 301
Schedule 10 Victoria
VIC Introduction .............................................................................................................. 305
Section A Governing requirements .......................................................................................... 306
Section B Water services .......................................................................................................... 307
Section C Sanitary plumbing and drainage systems ............................................................... 315
VIC Part C4 Low risk on-sit e liquid trade waste systems ........................................................... 318
Section D Excessive noise ........................................................................................................ 320
Section E Facilities and ancillary additions .............................................................................. 321
VIC Part E2 Heating, ventilation and air conditioning systems ................................................. 322
VIC Part E3 Stormwater - Roof drainage systems ..................................................................... 325
VIC Part E4 Stormwater - Surface and sub-sur face drainage systems .................................... 327
Schedule 1 Definitions ................................................................................................................ 329
Schedule 2 Referenced documents ............................................................................................ 331
VIC Footnote: Other legislation affecting buildings ...................................................... 337
Schedule 11 Western Australia
WA Introduction .............................................................................................................. 339
Schedule 1 Definitions ................................................................................................................ 340
Schedule 2 Referenced documents ............................................................................................ 341
WA Footnote: Other legislation affecting buildings ...................................................... 342
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 6
About the NCC
The NCC is Australia’s primary set of technical design and construction provisions for buildings. As a performance-based
code, it sets the minimum required level for the safety, health, amenity, accessibility and sustainability of certain buildings .
It primarily applies to the design and construction of new buildings, and plumbing and drainage systems in new and existing
buildings. In some cases it may also apply to structures associated with buildings and new building work or new plumbing
and drainage work in existing buildings.
The Australian Building Codes Board (ABCB), on behalf of the Australian Government and each State and Territory
government, produces and maintains the NCC. When determining the content of the NCC, the ABCB seeks to—
ensure requirements have a rigorously tested rationale; and •
effectively and proportionally address applicable issues; and •
create benefits to society that outweigh costs; and •
consider non-regulatory alternatives; and •
consider the competitive effects of regulation; and •
not be unnecessarily restrictive. •
The primary users of the NCC include architects, builders, plumbers, building surveyors, hydraulic consultants, engineers
and other building and plumbing related professions and trades.
Format of the NCC
The NCC is published in three volumes. The Building Code of Australia (BCA) is Volumes One and Two of the NCC and
the Plumbing Code of Australia (PCA) is Volume Three of the NCC.
Components of the NCC
The NCC provides the technical provisions for the design and construction of buildings and other structures, and plumbing
and drainage systems.
NCC Volume One primarily covers the design and construction of multi-residential, commercial, industrial and public
assembly buildings and some associated structures.
NCC Volume Two primarily covers the design and construction of smaller scale buildings including houses, small sheds,
carports and some associated structures.
NCC Volume Three covers the design, construction and maintenance of plumbing and drainage systems in new and
existing buildings.
Each volume contains—
Governing Requirements; and •
Performance Requirements; and •
compliance options to meet the NCC requirements; and •
State and Territory variations and additions. •
The NCC uses building classifications to identify requirements for different intended purposes of buildings or parts of
buildings. A building classification relates to the characteristics and the intended use of the building. Information on buildi ng
classifications is found in Part A6 of the Governing Requirements.
Legislative arrangements and the NCC
The NCC is given legal effect through State and Territory, or other statutory authority, building and plumbing legislation.
These Acts and Regulations set out the legal framework and administration mechanisms for the NCC to support the design
and construction of buildings. Introduction to the National Construction Code (NCC)
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 7The dates of adoption of the NCC are determined by State and Territory building and plumbing administrations.
How to use the NCC
Each volume of the NCC is split into two main sections:
Administrative requirements contained within the Governing Requirements. •
Technical requirements contained within the remaining sections of the NCC. •
The Governing Requirements provide the rules and instructions for using and complying with the NCC. They are vital in
understanding how the technical requirements of the NCC should be applied to any particular situation. The Governing
Requirements are also important in understanding how the NCC fits with the building and plumbing regulatory framework
within Australia.
NCC clause numbering system
The NCC uses a uniform clause numbering system across each of its three volumes. This system is called Section-Part-
Type-Clause (SPTC). In each clause number—
The first letter indicates which NCC Section sits within, or if the letter S is used, that the clause is part of a Specificatio n. •
The letter S is used in place of a Section indicator because the same Specification may be called up in several different
Sections of the NCC.
The first number indicates the number of each Part within a Section, or the number of a Specification. Parts are •
numbered sequentially within each Section, starting at 1. Specifications are numbered sequentially across all three
volumes, also starting at 1. The second letter indicates the clause Type. It will be G, O, F, P, V, D or C and these are explained below.
•
The second number is the clause number within each Part or Specification. •
The clause Types used in the NCC are as follows:
G = Governing requirement (mandatory) •
O = Objective (guidance) •
F = Functional Statement (guidance) •
P = Performance Requirement (mandatory) •
V = Verification Method (optional) •
D = Deemed-to-Satisfy Provision (optional) •
C = Clause in a Specification (clauses in Specifications may be mandatory or optional, depending on how the •
Specification is called up by the NCC).
Informative parts of the NCC (e.g. Introduction to the NCC) are not numbered and do not have numbered paragraphs.
This helps make it easy to see that their content is information only and does not contain any regulatory requirements.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 8
About NCC Volume Three
NCC Volume Three contains technical requirements for the design and construction for plumbing and drainage systems
in new and existing buildings. Volume Three applies to these systems in all classes of buildings whenever plumbing work
is carried out. Volume Three additionally applies to sites where water services are constructed independent of buildings.
Components of NCC Volume Three
NCC Volume Three contains the following Sections:
Section A – Governing Requirements, common across the NCC •
Section B – Water services •
Section C – Sanitary plumbing and drainage systems •
Section D – Excessive noise •
Section E – Facilities •
Schedules – •
Abbreviations and symbols ◾
NCC defined terms ◾
Referenced documents ◾
State and Territory variations and additions ◾
Section A contains the mandatory Governing Requirements for the NCC. Sections B to E contain mandatory Performance
Requirements and the compliance options to satisfy compliance with the NCC.Introduction to NCC Volume Three
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 9
Table 1 sets out the number and title of each NCC Specification, along with the clauses in each NCC Volume that refer to
the Specification.
Table 1 : List of NCC Specifications List of NCC Specifications
Spec
no.Title References
Vols. One, Two and Housing
ProvisionsVol. Three
1 Fire resistance of building elements A5G5 ; A5G6 ; C4D15; S2C1 ;
S9C2A5G5 ; A5G6
2 Description of materials referred to in Specification 1 A5G5 ; A5G6 ; C4D15; S1C2 ;
S9C2A5G5 ; A5G6
3 Fire hazard properties (determination) A5G6 A5G6
4 Design of buildings in cyclonic areas B1D3 -
5 Fire-resisting construction C2D2; C2D10; C3D6; C3D8;
C3D9; C3D10; C3D11;
C3D13; C4D6; C4D8;
C4D13; C4D15; D2D13;
E1D5; G3D6; S17C11;
S18C4; S31C3-
6 Structural tests for lightweight construction B1D4; C2D9; S5C23; S14C2;
S32C2; S32C3; Housing
Provisions 9.3.1-
7 Fire hazard properties (requirements) C2D11; C2D14; S3C2 ;
S14C2; S19C7; S32C6-
8 Performance of external walls in fire C2D12 -
9 Cavity barriers for fire-protected timber C2D13; C4D16; S5C11;
S5C20-
10 Fire protected timber S1C2 -
11 Smoke-proof walls in health-care and residential care
buildingsC3D6; C3D15; C4D12;
E2D11-
12 Fire doors, smoke doors, fire windows and shutters C4D5; G3D4; S11C2; S11C3 -
13 Penetration of walls, floors and ceilings by services C4D15 -
14 Non-required stairways, ramps and escalators C2D11; D2D17 -
15 Braille and tactile signs D4D7; S27C10 -
16 Accessible water entry/exit for swimming pools D4D11 -
17 Fire sprinkler systems C1V3; C2D6; C2D13; C3D2;
C3D4; C3D7; C3D8; C4D6;
C4D7; C4D8; C4D9; C4D12;
D2D4; D2D17; E1D4; E2D8;
E2D9; E2D10; E2D11;
E2D13; E2D14; E2D15;
E2D16; E2D17; E2D19;
E2D20; G3D1; G3D6; G6D6;
I1D2; S5C10; S5C11; S5C14;
S5C18; S5C19; S5C20;
S5C21; S5C22; S5C24;
S7C3; S7C4; S19C11;
S20C3; S20C4; S20C5;
S31C2-
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 10Spec
no.Title References
Vols. One, Two and Housing
ProvisionsVol. Three
18 Class 2 and 3 buildings not more than 25 m in effective
heightE1D4; S17C2; S23C1;
S23C3-
19 Fire control centres E1D14 -
20 Smoke detection and alarm systems E2D3; E2D5; E2D7; E2D8;
E2D9; E2D11; E2D13;
E2D14; E2D15; E2D16;
E2D17; E2D18; E2D19;
E2D20; S5C19; S5C22;
S17C8; S18C3; S21C7;
S21C8; S22C3-
21 Smoke exhaust systems C3D13; E2D10; E2D14;
E2D15; E2D16; E2D17;
E2D18; E2D19; E2D20;
S20C6; S20C8-
22 Smoke-and-heat vents E2D10; E2D14; E2D15;
E2D16; E2D17; E2D18;
E2D19; E2D20; S20C8-
23 Residential fire safety systems S18C3; S18C4 -
24 Lift installations E3D2 -
25 Photoluminescent exit signs E4D8 -
26 Waterproofing and water resistance requirements for
building elements in wet areasF1D6 -
27 Accessible adult change facilities F4D12; S15C1 -
28 Sound insulation for building elements F5D3; F5D4 -
29 Impact sound — Test of equivalence F5D4; S28C2 -
30 Installation of boilers and pressure vessels G2D2 -
31 Fire and smoke control in buildings containing atriums G3D4; G3D8; S14C2 -
32 Construction of proscenium walls C2D11; I1D3 -
33 Additional requirements J1V1; J1V2; J1V3; J1V5 -
34 Modelling parameters J1V3; S35C1 -
35 Modelling profiles S34C3 -
36 Material properties J4D3 -
37 Calculation of U-Value and solar admittance J3D9; J3D13; J4D3; J4D6 -
38 Spandrel panel thermal performance S37C3; S37C4 -
39 Sub-floor thermal performance J4D3 -
40 Lighting and power control devices J7D3; J7D4; J7D5; J7D6;
J7D7-
41 Cross-connection hazards - B5D2 ; B5D3 ;
B5D4
42 House energy rating software H6D2 -
43 Bushfire protection for certain Class 9 buildings G5D4 -
44 Calculation of heating load limit, cooling load limit and
thermal energy load limitJ1P2; H6P1 -
45 Modelling profiles for J1V5 J1V5 -
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 11
The history of adoption of NCC Volume Three is outlined in Table 1.
Table 1 : History of adoption of NCC Volume Three History of adoption of NCC Volume Three
Edition Common
wealthACT NSW NT QLD SA TAS VIC WA
NCC
20111 May
20111 May 2011 Not adopted Not adopted 5 May 2011 11 Jul 2011 1 May 2011 1 May 2011 Not adopted
NCC
20121 May 2012 Not adopted 1 Jul 2012 3 Aug 2012 1 May 2012 1 May 2012 1 May 2012 1 May 2012 Not adopted
NCC 2013 1 May 2013 1 Sep 2013 1 May 2013 1 May 2013 1 May 2013 1 May 2013 1 May 2013 1 May 2013 Not adopted
NCC
20141 May 2014 1 May 2014 1 May 2014 1 May 2014 1 May 2014 1 May 2014 1 May 2014 1 May 2014 Not adopted1
NCC
20151 May 2015 1 May 2015 1 May 2015 1 May 2015 1 May 2015 1 May 2015 1 May 2015 1 May 2015 1 May 2015
NCC
20161 May 2016 1 May 2016 1 May 2016 1 May 2016 1 May 2016 1 May 2016 1 May 2016 1 May 2016 1 May 2016
NCC
20191 May 2019 1 Jun 2019 1 May 2019 1 May 2019 1 May 2019 1 May 2019 1 May 2019 1 May 2019 1 May 2019
NCC 2019
Amdt 11 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020 1 Jul 2020
NCC 2022 1 May 2023 1 May 2023 1 May 2023 1 May 2023 1 May 2023 1 May 2023 1 May 2023 1 May 2023 1 May 2023
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 12This list has been prepared by the
Australian Building Codes Board to assist National Construction Code (NCC) users in
identifying changes incorporated in the 2022 edition of NCC Volume Three.
The notes provide a description of major changes made from the previous edition of Volume Three. If additional information
is required to assist in understanding, interpreting or applying the provisions of the 2022 edition of Volume Three, reference
should be made to the Guide to Volume Three.
While the Australian Building Codes Board has attempted to include all major changes made from the previous edition of
Volume Three, the Board does not give any warranty nor accept any liability in relation to the contents of this list of
amendments.
Table 1 : List of amendments - NCC 2022 Volume Three
Reference Changes and commentary
General
Throughout An Introduction to this Part has been added to introduce
the intent and purpose of every Part of the NCC.
Throughout The Objectives and Functional Statements have been
relocated into NCC Volume One.
Throughout A number of provisions have been amended, restructured,
deleted and relocated as part of the initiative to provide a
consistent NCC structure and improve NCC usability.
Section A - Governing requirements
A1G1 A new clause has been added to specify the scope of
NCC Volume One.
A1G2 A new clause has been added to specify the scope of
NCC Volume Two.
A1G3 A new clause has been added to specify the scope of
NCC Volume Three.
A2G2(4)(b) The existing clause has been amended to remove
unnecessary duplication.
A5G3 A Note has been included to outline transitional
arrangements for the 2022 new numbering system and
documentary evidence.
A5G4 A new clause has been added to limit lead content in
copper alloy plumbing products in contact with drinking
water.
A5G9 A new clause has been added to require a NatHERS
certificate be issued for the house energy rating software
output where house energy rating software is required.
A6G1 The limitation statement has been amended to include a
Class 9b early childhood centre.
Specification 1 Schedule 5 in NCC 2019 Amendment 1 has been
relocated into new Specification 1 and 2.
Specification 2 Schedule 5 in NCC 2019 Amendment 1 has been
relocated into new Specification 1 and 2.
Specification 3 Schedule 6 in NCC 2019 Amendment 1 has been
relocated into new Specification 3.
Part B1 - Cold water services
B1F3 A new Functional Statement for residential fire sprinkler
equipment has been inserted. List of amendments - NCC 2022 Volume Three
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 13Reference Changes and commentary
B1P2 The existing clause has been amended and now contains
a quantified level of performance for pipework water
velocity.
B1P3 The existing clause has been amended as a standalone
Performance Requirement for Access and isolation as a
consequence of new quantified Performance
Requirements B1P2, B1P4 and B1P5.
B1P4 The existing clause has been amended and now contains
quantified levels of performance for water efficiency.
B1P5 The existing clause has been amended and now contains
quantified levels of performance for pressure.
B1P6 The existing clause has been amended as a standalone
Performance Requirement for Uncontrolled discharge as
a consequence of new quantified Performance
Requirements B1P2, B1P4 and B1P5.
B1D2 Sanitary flushing has been amended to Water efficiency
and contains new provisions for Water efficiency.
B1D4 A new provision for Bushfire prone areas has been
inserted.
B1D5 A new clause for Cold water fire sprinkler systems has
been inserted.
B1D6 A new clause for Top-up lines has been inserted.
Part B2 - Heated water services
B2P2 The existing Performance Requirement has been
amended to Scald prevention and now includes point of
discharge.
B2P3 The existing Performance Requirement has been
amended and now contains quantified levels of
performance for heated water pipework water Velocity.
B2P4 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Access and isolation.
B2P5 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Pressure relief and temperature
limitation.
B2P6 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Legionella control.
B2P8 The existing Performance Requirement has been
amended as a standalone requirement for Temperature.
B2P9 The existing Performance Requirement has been
amended and now contains quantified levels of
performance for Pressure.
B2P10 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Uncontrolled discharge.
B2P11 A new Performance Requirement for Water efficiency has
been inserted.
B2D2 New subclauses have been added for solar, gas and
electric water heaters.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 14Reference Changes and commentary
B2D4 The title has been amended to Water efficiency and now
includes minimum requirements for WELS ratings.
B2D9 The existing clause has been amended as a
consequence of relocating exemptions for solar heated
water supply to B2D11
B2D10 A new clause has been inserted for Bushfire prone areas.
B2D11 The existing clause has been amended as a standalone
clause for Solar heated water.
Part B3 - Non-drinking water services
B3P1 The title of the Performance Requirement has been
amended to Non-drinking water.
B3P3 The title of the Performance Requirement has been
amended to Velocity and now contains a quantified level
of performance for non-drinking water pipework water
velocities.
B3P4 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Access and isolation as a consequence of new quantified
Performance Requirements B3P3, B3P5 and B3P7.
B3P5 The existing Performance Requirement has been
amended as a standalone Performance Requirement and
now contains quantified levels of performance for
pressure.
B3P6 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Uncontrolled discharge as a consequence of new
quantified Performance Requirements B3P3, B3P5 and
B3P7.
B3P7 A new Performance Requirement for Water efficiency in
non-drinking water has been inserted.
B3D4 A new clause has been inserted for Bushfire prone areas.
B3D5 A new clause has been inserted for Water efficiency.
Part B4 - Fire-fighting water services
B4P1 The title of the Performance Requirement has been
amended to Flow rate and pressure and now contains
quantified levels of performance for water supply flow and
pressures.
B4P2 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Access and isolation.
B4P3 A new Performance Requirement for Fire-fighting water
storage has been inserted.
B4P4 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Uncontrolled discharge.
B4D2 The existing clause has been amended as a
consequence of new clauses for Fire-fighting water
services B4D3, B4D4, B4D5 and B4D6.
B4D3 A new clause has been inserted for Fire sprinkler
systems.
B4D4 A new clause has been inserted for Fire hydrants.
B4D5 A new clause has been inserted for Fire hose reels.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 15Reference Changes and commentary
B4D6 A new clause has been inserted for Bushfire prone areas.
Part B5 - Cross-connection control
B5P1 The application of the Performance Requirement has
been amended to include Rainwater services.
B5V1 A new Verification Method, Determination of individual
and zone hazard ratings, has been inserted as an option
to verify compliance with B5P1.
B5D5 A new clause has been inserted for an Unprotected water
service.
Part B6 - Rainwater services
Part B6 2019 Part B6 Rainwater harvesting and use has been divided
into two parts, Part B6 Rainwater services and Part B7
Rainwater storage.
B6P1 The existing Performance Requirement has been
amended as a standalone quantified Performance
Requirement for pressure of a rainwater service.
B6P2 The existing Performance Requirement has been
amended as a standalone quantified Performance
Requirement for pipework water velocity.
B6P3 The existing Performance Requirement has been
amended as a standalone quantified Performance
Requirement for Water efficiency.
B6P4 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Access and isolation.
B6P5 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Identification.
B6P6 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Uncontrolled discharge.
B6D2 The title has been amended to General requirements and
includes requirement for Rainwater service, previously
located in B6.5 of NCC 2019 Volume Three.
B6D3 The existing clause has been amended as a standalone
Performance Requirement Identification.
B6D4 A new clause has been inserted for Water efficiency.
B6D5 A new clause has been inserted for Access and isolation.
B6D6 A new clause has been inserted for Bushfire prone areas.
Part B7 - Rainwater storage
Part B7 A new Part B7 ‘Rainwater storage has been added.
B7P1 The existing Performance Requirement has been inserted
as a new Performance Requirement for Contamination
control to reflect the relevant provisions of BP6.1.
B7P2 The existing Performance Requirement has been inserted
as a new Performance Requirement for Uncontrolled
discharge to reflect the relevant provisions of BP6.2.
B7P3 The existing Performance Requirement has been inserted
as a new Performance Requirement for Access and
isolation to reflect the relevant provisions of BP6.2.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 16Reference Changes and commentary
B7P4 The existing Performance Requirement has been inserted
as a new Performance Requirement for Identification to
reflect the relevant provisions of BP6.4.
B7D2 The existing clause has been inserted as a new clause
Collection of rainwater to reflect the relevant provisions of
B6.2.
B7D3 The existing clause has been inserted as a new clause
Identification to reflect the relevant provisions of B6.5.
Specification 41
S41C2 The existing clause has been amended to remove sub-
clause relating to the definition of an Irrigation system, as
this has been consolidated into Schedule 1.
S41C3 The existing clause has been amended to remove
requirements relating to Fire-fighting water services and a
new provision has been added for pipework and outlets.
S41C4 The existing clause has been amended to reflect updated
requirements for components that need Individual
protection.
S41C5 The existing clause has been amended to reflect updated
requirements for components that need Zone protection.
S41C6 The existing clause has been amended to reflect updated
requirements for components that need Containment
protection and restructured to improve clarity.
S41C7 The existing clause has been amended to improve clarity.
Part C1 - Sanitary plumbing systems
C1P1 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Disposal.
C1P2 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Access.
C1P3 The existing Performance Requirement has been
amended and now contains quantified levels of
performance for Water efficiency.
C1P4 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Uncontrolled discharge.
C1P5 The existing Performance Requirement has been
amended and now contains quantified levels of
performance for Ventilation.
C1P6 The existing Performance Requirement has been
amended and now contains quantified levels of
performance for Contamination.
C1P7 The existing Performance Requirement has been
amended and now contains a quantified level of
performance for Damage.
C1V1 A new Determination of Sanitary plumbing wastewater
flowrates verification method has been inserted as a
means of verifying compliance with C1P3 for pipe sizing.
C1V2 A new System 1 - Common discharge design verification
method has been inserted as a means of verifying
compliance with C1P5 for pipe sizing.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 17Reference Changes and commentary
C1V3 A new System 2 - Common discharge pipe capacity
verification method has been inserted as a means of
verifying compliance with C1P5 for pipe sizing.
C1V4 A new System 3 - Branch design verification method has
been inserted as a means of verifying compliance with
C1P5 for pipe sizing.
C1V5 A new Stack design verification method has been inserted
as a means of verifying compliance with C1P5 for pipe
sizing.
C1D3 The existing clause has been amended for clarity.
C1D4 A new clause for Bushfire prone areas has been inserted.
C1D5 A new clause for Water efficiency has been inserted.
Part C2 - Sanitary drainage systems
C2P1 The title of the Performance Requirement has been
amended to Disposal as a consequence of relocating
previous requirements into standalone Performance
Requirements C2P3, C2P4 C2P5, C2P6 and C2P7.
C2P3 The existing Performance Requirement has been
amended as a standalone Performance Requirement for
Access.
C2P4 The existing Performance Requirement has been
amended and now contains a new quantified performance
requirement for Ventilation to avoid hydraulic load
imbalance.
C2P5 The existing Performance Requirement has been
amended as a standalone performance requirement and
include additional requirements for Contamination.
C2P6 The existing Performance Requirement has been
amended as a standalone performance requirement for
Uncontrolled discharge.
C2P7 The existing Performance Requirement has been
amended as a standalone performance requirement for
Damage.
C2V3 A new Determination of sanitary drainage wastewater
flowrates verification method has been inserted as a
means of verifying compliance with C2P1 for pipe sizing.
C2D3 The existing clause has been amended to require
pumped discharge from a swimming pool to be connected
to the sanitary drainage system.
C2D4 The existing clause has been amended for clarity.
C2D5 A new provision for Bushfire prone areas has been
inserted.
Part C3 - On-site wastewater management
Part C3 A new Part has been inserted containing provisions for
On-site wastewater management. This includes a new
Objective, Functional Statement, Performance
Requirements and Deemed-to-Satisfy Provisions.
Part D1 - Excessive noise
D1D2 A new provision has been inserted to include compliance
with B6D2.
Referenced documents
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 18Reference Changes and commentary
AS/NZS 1170.2
The 2021 edition of AS/NZS 1170 Part 2 ‘Structural
design actions — Wind actions’ has been referenced.
AS 1288 The 2021 edition of AS 1288 ‘Glass in buildings —
Selection and installation’ has been referenced.
AS 1397 The 2021 edition of AS 1397 ‘Continuous hot-dip metallic
coated steel sheet and strip — Coatings of zinc and zinc
alloyed with aluminium and magnesium’ has been
referenced. A note has been included to outline
transitional arrangements.
AS 1530 Parts 1 to 4 The notes to AS 1530 Parts 1 to 4 have been deleted.
AS 1530.8.1 The 2018 edition of AS 1530 Part 8.1 ‘Methods for fire
tests on building materials, components and structures —
Tests on elements of construction for buildings exposed to
simulated bushfire attack — Radiant heat and small
flaming sources’ has been referenced.
AS/NZS 1546.1 The 2008 edition of AS/NZS 1546 Part 1 ‘On-site
domestic wastewater treatment units — Septic tanks’ has
been referenced.
AS/NZS 1546.2 The 2008 edition of AS/NZS 1546 Part 2 ‘On-site
domestic wastewater treatment units — Waterless
composting toilets’ has been referenced.
AS 1546.3 Amdt 1 of the 2017 edition of AS1546 Part 3 ‘On-site
domestic wastewater treatment units — Secondary
treatment systems (incorporating amendment 1)’ has
been referenced.
AS 1546.4 The 2016 edition of AS 1546 Part 4 ‘On-site domestic
wastewater treatment units — Domestic greywater
treatment systems’ has been referenced.
AS/NZS 1547 The 2012 edition of AS/NZS 1547 ‘On-site domestic
wastewater management’ has been referenced.
AS/NZS 1562.2 The 1999 edition of AS/NZS 1562 Part 2 ‘Design and
installation of sheet roof and wall cladding — Corrugated
fibre-reinforced cement’ has been deleted.
AS 1562.3 The 2006 edition of AS 1562 Part 3 ‘Design and
installation of sheet roof and wall cladding — Plastic’ has
been referenced.
AS 1670.1 Amdt 1 of the 2018 edition AS 1670 Part 1 ‘Fire detection,
warning, control and intercom systems — System design,
installation and commissioning — Fire (incorporating
amendment 1)’ has been referenced. Notes to AS 1670
have been amended to outline transitional arrangements.
AS 1670.3 Amdt 1 of the 2018 edition AS 1670 Part 3 ‘Fire detection,
warning, control and intercom systems — System design,
installation and commissioning — Fire alarm monitoring
(incorporating amendment 1)’ has been referenced. Notes
to AS 1670 have been amended to outline transitional
arrangements.
AS 1670.4
Amdt 1 of the 2018 edition AS 1670 Part 4 ‘Fire detection,
warning, control and intercom systems — System design,
installation and commissioning — Emergency warning
and intercom systems (incorporating amendment 1)’ has
been referenced. Notes to AS 1670 have been amended
to outline transitional arrangements.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 19Reference Changes and commentary
AS 1684.2 The 2021 edition of AS 1684 Part 2 ‘Residential timber-
framed construction — Non-cyclonic areas’ has been
referenced.
AS 1684.3 The 2021 edition of AS 1684 Part 3 ‘Residential timber-framed construction —Cyclonic areas’ has been
referenced.
AS/NZS 1720.4 The 2019 edition of AS/NZS 1720 Part 4 ‘Timber
structures — Fire resistance for structural adequacy of
timber elements’ has been referenced.
AS 1720.5 Amdt 1 of the 2015 edition of AS 1720 Part 5 ‘Timber
structures —Nailplated timber roof trusses (incorporating
amendment 1)’ has been referenced.
AS/NZS 1859.4 The note to AS/NZS 1859.4 has been deleted.
AS 2047 Note to AS 2047 has been updated to reflect transitional
arrangements.
AS 2118.1 Amdt 2 of the 2017 edition of AS 2118 Part 1 ‘Automatic
fire sprinkler systems — General systems (incorporating
amendments 1 and 2)’ has been referenced.
AS 2118.4 The 2012 edition of AS 2118 Part 4 ‘Automatic fire
sprinkler systems – Sprinkler protection for
accommodation buildings not exceeding four storeys in
height’.
AS 2118.5 The 2008 edition of AS 2118 Part 5 ‘Automatic fire
sprinkler systems — Home fire sprinkler systems’ has
been referenced.
AS 2118.6 The 2012 edition of AS 2118 Part 6 ‘Automatic fire
sprinkler systems – Combined sprinkler and hydrant
systems in multistorey buildings’.
AS/NZS 2293.1 Amdt 1 of the 2018 edition of AS/NZS 2293 Part 1
‘Emergency lighting and exit signs for buildings — System
design, installation and operation (incorporating
amendment 1)’ has been referenced.
AS 2312.1 The 2014 edition of AS 2312 Part 1 ‘Guide to the
protection of structural steel against atmospheric
corrosion by the use of protective coatings — Paint
coatings’ has been referenced.
AS/NZS 2312.2 The 2014 edition of AS/NZS 2312 Part 2 ‘Guide to the
protection of structural steel against atmospheric
corrosion by the use of protective coatings — Hot dip
galvanizing’ has been referenced.
AS/NZS 2327 Amdt 1 of the 2017 edition of AS/NZS 2327 ‘Composite
steel structures — composite steel-concrete construction
in buildings (incorporating amendment 1)’ has been
referenced.
AS 2419.1 The 2021 edition of AS 2419 Part 1 ‘Fire hydrant
installations — System design, installation and
commissioning’ has been referenced.
AS 2441 The 2005 edition of AS 2441 ‘Installation of fire hose reels
(incorporating amendment 1) has been referenced.
AS 2699.1 The 2020 edition of AS 2699 Part 1 ‘Built-in components
for masonry construction — Wall ties’ has been
referenced. A note has been included to outline
transitional arrangements.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 20Reference Changes and commentary
AS 2699.3 The 2020 edition of AS 2699 Part 3 ‘Built-in components
for masonry construction — Lintels and shelf angles
(durability requirements)’ has been referenced. A note has
been included to outline transitional arrangements.
AS/NZS 3500.0 The 2021 edition of AS 3500 Part 0 ‘Plumbing and
drainage — Glossary of terms’ has been referenced.
AS/NZS 3500.1 The 2021 edition of AS 3500 Part 1 ‘Plumbing and
drainage — Water services’ has been referenced.
AS/NZS 3500.2 Amdt 1 of the 2021 edition of AS 3500 Part 2 ‘Plumbing
and drainage — Sanitary plumbing and drainage
(incorporating amendment 1)’ has been referenced.
AS/NZS 3500.3 The 2021 edition of AS 3500 Part 3 ‘Plumbing and
drainage — Stormwater drainage’ has been referenced. A
note has been included to outline transitional
arrangements.
AS/NZS 3500.4 The 2021 edition of AS 3500 Part 4 ‘Plumbing and
drainage — Heated water services’ has been referenced.
AS 3600
Amdt 2 of the 2018 edition of AS 3600 ‘Concrete
structures (incorporating amendments 1 and 2)’ has been
referenced.
AS 3740 The 2021 edition of AS 3740 ‘Waterproofing of domestic
wet areas’ has been referenced.
AS 3959 Amdts 1 and 2 of the 2018 edition of AS 3959
‘Construction of buildings in bushfire-prone areas
(incorporating amendments 1 and 2)’ has been
referenced.
AS 4055 The 2021 edition of AS 4055 ‘Wind loads for housing’ has
been referenced.
AS 4072.1 The note to AS 4072 Part 1 has been deleted.
AS 4100 The 2020 edition of AS 4100 ‘Steel structures’ has been
referenced.
AS 4200.1 Amdt 1 of the 2017 edition of AS 4200 Part 1 ‘Pliable
building membranes and underlays — Materials
(incorporating amendment 1)’ has been referenced.
AS 4200.2 Amdts 1 and 2 of the 2017 edition of AS 4200 Part 2
‘Pliable building membranes and underlays — Installation
requirements (incorporating amendments 1 and 2)’ has
been referenced.
AS/NZS 4234 The 2021 edition of AS/NZS 4234 ‘Heated water systems
— Calculation of energy consumption’ has been
referenced.
AS 4254.1 The 2021 edition of AS 4254 Part 1 ‘Ductwork for air-
handling systems in buildings — Flexible duct’ has been
referenced.
AS/NZS 4256.1
The 1994 edition of AS/NZS 4256 Part 1 ‘Plastic roof and
wall cladding materials — General requirements’ has
been deleted.
AS/NZS 4256.2 The 1994 edition of AS/NZS 4256 Part 2 ‘Plastic roof and
wall cladding materials — Unplasticized polyvinyl chloride
(uPVC) building sheets’ has been deleted.
AS/NZS 4256.3 The 1994 edition of AS/NZS 4256 Part 3 ‘Plastic roof and
wall cladding materials — Glass fibre reinforced polyester
(GRP)’ has been deleted.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 21Reference Changes and commentary
AS/NZS 4256.5 The 1996 edition of AS/NZS 4256 Part 5 ‘Plastic roof and
wall cladding materials — Polycarbonate’ has been
deleted.
AS 4773.2 Amdt 1 of the 2015 edition of AS 4773 Part 2 ‘Masonry in
small buildings — Construction’ has been referenced.
AS/NZS 4858 The 2004 edition of AS/NZS 4858 ‘Wet area membranes’
has been referenced.
AS 5146.3 The 2018 edition of AS 5146 Part 3 ‘Reinforced
Autoclaved Aerated Concrete — Construction’ has been
reinforced referenced.
AS 5216 The 2021 edition of AS 5216 ‘Design of post-installed and
cast-in fastenings in concrete’ has been referenced.
AS/NZS 5601.1 The 2013 edition of AS/NZS 5601 Part 1 ‘Gas installations
— General installations’ has been referenced.
AIRAH-DA07 The 2021 edition of AIRAH-DA07 ‘Criteria for moisture
control design analysis in buildings’ has been referenced.
ASTM E903 The 2012 edition of ASTM E903 ‘Standard Test Method
for Solar Absorptance, Reflectance, and Transmittance of
Materials Using Integrating Spheres’ has been deleted.
ASTM E96 The 2016 edition of ASTM E96 ‘Standard Test Methods
for Water Vapor Transmission of Materials’ has been
referenced.
ABCB The 2022 version of the ABCB ‘Fire Safety Verification
Method’ Standard has been referenced.
ABCB The 2022 version of the ABCB ‘Housing Provisions’
Standard has been referenced.
ABCB The 2022 version of the ABCB ‘Livable Housing Design’
Standard has been referenced.
ABCB The 2022 version of the ABCB ‘Standard for NatHERS
Heating and Cooling Load Limits’ has been referenced.
ABCB The 2022 version of the ABCB ‘Standard for Whole-of-
home Efficiency Factors’ has been referenced.
FPAA101D The 2021 edition of FPAA101D ‘Automatic Fire Sprinkler
System Design and Installation — Drinking Water Supply’
has been referenced.
FPAA101H Amdt 1 of the 2018 edition of FPAA101H ‘Automatic Fire
Sprinkler System Design and Installation — Hydrant
Water Supply (incorporating amendment 1)’ has been
referenced.
NASH Standard The 2021 edition of NASH Standard ‘Steel Framed
Construction in Bushfire Areas’ has been referenced.
NSF/ANSI/CAN 372 The 2020 edition of NSF/ANS/CAN 372 ‘Drinking Water
System Components — Lead Content’ has been
referenced.
Schedule 1
Schedule 1 Schedule 1 has been amended as part of the initiative to
improve readability of the NCC.
Schedule 1 Definitions includes Abbreviations, Symbols and Glossary.
States & Territory Appendices (formerly located in
Schedule 1) have been incorporated into Schedule 3 to
Schedule 11.
Abbreviations
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 22Reference Changes and commentary
Abbreviations Acrylic conformal coating (ACC) has been added.
Abbreviations Acrylic latex (ACL) has been added.
Abbreviations Australian Institute of Refrigeration, Air conditioning and
Heating (AIRAH) has been added.
Abbreviations American National Standards Institute (ANSI) has been
added.
Abbreviations American Society of Heating, Refrigerating and Air
Conditioning Engineers (ASHRAE) has been added.
Abbreviations National Standard of Canada (CAN) has been added.
Abbreviations Chartered Institution of Building Services Engineers
(CIBSE) has been added.
Abbreviations Flame zone (FZ) has been added.
Abbreviations Greenhouse and Energy Minimum Standards (GEMS)
has been added.
Abbreviations Hot dip galvanising (HDG) has been added.
Abbreviations Inorganic zinc silicate (IZS) has been added.
Abbreviations NATA has been amended to include reference to
Australia.
Abbreviations National Sanitation Foundation (NSF) has been added.
Abbreviations Polyurethane (PUR) has been added.
Symbols
Symbols µg/N.s has been added.
Symbols f’c has been added.
Symbols f’y has been added.
Symbols G has been added.
Symbols N/m has been added.
Symbols Q has been added.
Symbols ULS has been added.
Glossary / Definitions
Glossary A defined term, ‘Above ground rainwater tank’, has been
added.
Glossary A defined term, ‘Annual exceedance probability’, has been
added as a consequence of amendments to Part 7.4
Gutters and downpipes of the ABCB Housing Provisions.
Glossary A defined term, ‘Assumed cooling thermostat set point’
has been added as a consequence of quantification in
J1P2 and H6P1.
Glossary The defined term, ‘Average recurrence interval’, has been
deleted as a consequence of amendments to Part 7.4
Gutters and downpipes of the ABCB Housing Provisions.
Glossary A defined term, ‘Bond breaker’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Building complexity criteria’, has been
added.
Glossary A defined term, ‘Buried rainwater tank’, has been added
as a consequence of amendments to Specification 41 of
Volume Three.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 23Reference Changes and commentary
Glossary A defined term, ‘Cooling degree hours’ has been added
as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Daily outdoor temperature range’ has
been added as a consequence of quantification in J1P2
and H6P1.
Glossary A defined term, ‘Dehumidification gram hours’, has been
added as a consequence of quantification in J1P2 and
H6P1.
Glossary A defined term, ‘Design bushfire’, has been added as a
consequence of amendments to Part G5.
Glossary The defined term, ‘Domestic services’, has been
amended to include on-site renewable energy equipment
as a result of quantification in J1P3 and H6P2.
Glossary A defined term, ‘Drainage flange’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Drainage riser’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Efficacy’, has been added as a
consequence of including quantified Performance
Requirement for automatic warning for occupants.
Glossary A defined term, ‘Energy value’, has been added as a
consequence of quantification in J1P3 and H6P2.
Glossary A defined term, ‘Engaged pier’, has been added as a
consequence of amendments to
Section 5
of the ABCBHousing Provisions.
Glossary A defined term, ‘Fire actions’, has been added as a
consequence of amendments to Part G5.
Glossary The defined term, ‘Flashing’, has been amended to clarify
perimeter and vertical flashings as a consequence of
amendments to Part 10.2 of the ABCB Housing
Provisions.
Glossary The defined term, ‘Floor area’, for Volume One, has been
amended on account of the new defined term ‘Volume’.
Glossary A defined term, ‘Floor waste’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary The defined term, ‘Glazing’, has been amended as a
consequence of the updates to the energy efficiency
Deemed-to-Satisfy provisions for Class 2 buildings.
Glossary A defined term, ‘Heating degree hours’, has been added
as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Hob’, has been added as a consequence
of amendments to Part 10.2 of the ABCB Housing
Provisions.
Glossary A defined term, ‘Irrigation system’, has been added as a
consequence of amendments to S41C2 in Volume Three.
Glossary A defined term, ‘Lateral support’, has been added as a
consequence of amendments to Part 5.3 of the ABCB
Housing Provisions.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 24Reference Changes and commentary
Glossary A defined term, ‘Main water heater’ has been added as a
consequence of including new whole-of-home energy
efficiency requirements.
Glossary A defined term, ‘Main space conditioning’ has been added
as a consequence of including new whole-of-home
energy efficiency requirements.
Glossary A defined term, ‘Maximum retained water level’, has been
added as a consequence of amendments to Part 10.2 of
the ABCB Housing Provisions.
Glossary A defined term, ‘Membrane’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary The defined term, ‘NABERS Energy for Offices’ has been
amended to be ‘NABERS Energy’ to reflect its use for
multiple building classifications.
Glossary The defined term, ‘Performance-based design brief’ has
been amended for clarity.
Glossary The defined term, ‘Point of connection’, has been
amended for clarity.
Glossary A defined term, ‘Preformed shower base’, has been
added as a consequence of amendments to Part 10.2 of
the ABCB Housing Provisions.
Glossary A defined term, ‘Primary insulation layer’, has been added
as a consequence of amendments to Condensation
management provisions.
Glossary The defined term ‘Rainwater harvesting system’ has been
amended to ‘Rainwater service’ and ‘Rainwater storage’
as a consequence of amendments to Part B6 of Volume
Three.
Glossary The defined term ‘Reference building’ has been amended
to remove reference to Thermal comfort levels and as a
consequence of the introduction of J1V5.
Glossary A defined term, ‘Reliability’, has been added as a
consequence of including quantified Performance
Requirements for automatic warning for occupants.
Glossary A defined term, ‘Screed’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary The defined term, ‘Shower area’, has been amended to
clarify enclosed and unenclosed shower areas as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Shower screen’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Thermal energy load’, has been added as
a consequence of quantification in J1P2 and H6P1.
Glossary The defined term ‘Total R-Value’ in the ABCB Housing
Provisions has been amended to align with Volume One.
Glossary The defined term ‘Total System U-Value’ in the ABCB
Housing Provisions has been amended to align with
Volume One.
(1 May 2023)
Preface
NCC 2022 Volume Three - Plumbing Code of Australia Page 25Reference Changes and commentary
Glossary A defined term ‘Unprotected water service’, has been
added as a consequence of introducing a new provision
for unprotected water service – B5D5 of Volume Three.
Glossary A defined term, ‘Vapour permeance’, has been added as
a consequence of amendments to the condensation
management provisions.
Glossary A defined term, ‘Volume’, has been added to clarify the
volume space with respect to a building, fire compartment
and atrium.
Glossary A defined term, ‘Waterproofing system’, has been added
as a consequence of amendments to Part 10.2 of the
ABCB Housing Provisions.
Glossary A defined term, ‘Water stop’, has been added as a
consequence of amendments to Part 10.2 of the ABCB
Housing Provisions.
Glossary A defined term, ‘Weighted average’, has been added as a
consequence of amendments to A5G4.
Glossary A defined term, ‘Wetted surface area’, has been added to
provide clarification for the defined term ‘Weighted
average’.
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 26
Section A Governing requirements
Part A1 Interpreting the NCC
Governing Requirements
A1G1 Scope of NCC Volume One
A1G2 Scope of NCC Volume Two
A1G3 Scope of NCC Volume Three
A1G4 Interpretation
Part A2 Compliance with the NCC
Governing Requirements
A2G1 Compliance
A2G2 Performance Solution
A2G3 Deemed -to -Satisfy Solution
A2G4 A combination of solutions
Part A3 Application of the NCC in States and Territories
Governing Requirements
A3G1 State and Territory compliance
Part A4 Referenced documents
Governing Requirements
A4G1 Referenced documents
A4G2 Differences between referenced documents and the NCC
A4G3 Adoption of referenced documents
Part A5 Documentation of design and construction
Governing Requirements
A5G1 Suitability
A5G2 Evidence of suitability ─ Volumes One, Two and Three
A5G3 Evidence of suitability ─ Volumes One and Two (BCA)
A5G4 Evidence of suitability ─ Volume Three (PCA)
A5G5 Fire-resistance of building elements
A5G6 Fire hazard properties
A5G7 Resistance to the incipient spread of fire
A5G8 Labelling of Aluminium Composite Panels
A5G9 NatHERS
Part A6 Building classification
Governing Requirements
A6G1 Determining a building classification
A6G2 Class 1 buildings
A6G3 Class 2 buildings
A6G4 Class 3 buildings
A6G5 Class 4 buildings
A6G6 Class 5 buildings
A6G7 Class 6 buildings
A6G8 Class 7 buildings
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 27A6G9 Class 8 buildings
A6G10 Class 9 buildings
A6G11 Class 10 buildings and structures
A6G12 Multiple classifications
Part A7 United buildings
Governing Requirements
A7G1 United buildings
A7G2 Alterations in a united building
Specification 1 Fire-resistance of building elements
S1C1 Scope
S1C2 Rating
S1C3 FRLs determined by calculation
S1C4 Interchangeable materials
S1C5 Columns covered with lightweight construction
S1C6 Non-loadbearing elements
Specification 2 Descriptions of elements referred to in Specification 1
S2C1 Scope
S2C2 Mortar for masonry
S2C3 Gypsum blocks
S2C4 Gypsum-sand mortar and plaster
S2C5 Gypsum-perlite and gypsum -vermiculite plaster
S2C6 Plaster of cement and sand or cement, lime and sand
S2C7 Plaster reinforcement
S2C8 Ashlar stone masonry
S2C9 Dimensions of masonry
S2C10 Solid units
S2C11 Hollow units
S2C12 Equivalent thickness
S2C13 Height -to -thickness ratio of certain walls
S2C14 Increase in thickness by plastering — walls
S2C15 Increase in thickness by plastering — columns
S2C16 Gypsum-perlite or gypsum -vermiculite plaster or metal lath —
walls
S2C17 Gypsum-perlite or gypsum -vermiculite plaster or metal lath —
columns
S2C18 Gypsum-perlite or gypsum -vermiculite plaster or metal lath —
beams
S2C19 Exposure of columns
S2C20 Exposure of beams
S2C21 Filling of column spaces
S2C22 Hollow terracotta blocks
S2C23 Reinforcing for column and beam protection — masonry
S2C24 Reinforcing for column and beam protection — gypsum blocks
and hollow terracotta blocks
S2C25 Reinforcing for column and beam protection — structural con
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 28crete and poured gypsum
S2C26 Reinforcing for column and beam protection — gypsum -perlite or
gypsum -v ermiculite plaster sprayed to contour
S2C27 Measurement of thickness of column and beam protection
Specification 3 Fire hazard properties
S3C1 Scope
S3C2 General requirement
S3C3 Form of test
S3C4 Test specimens
S3C5 Concession
S3C6 Smaller specimen permitted
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 29
Introduction to this Part
This Part explains important concepts on how the NCC must be interpreted and applied. There are certain conventions
and approaches that need to be taken into account when using the NCC. This includes interpreting specific language and
terms. This is critical to understanding the intended technical and legal meaning of the NCC. This Part also explains the
difference between the mandatory Parts of the NCC and the Parts that are only explanatory or guidance in nature.
A1G1 Scope of NCC Volume One
[New for 2022]
NCC Volume One contains the requirements for—
all Class 2 to 9 buildings; and (a)
access requirements for people with a disability in Class 1b and 10a buildings; and (b)
certain Class 10b structures including access requirements for people with a disability in Class 10b swimming (c)
pools .
A1G2 Scope of NCC Volume Two
[New for 2022]
NCC Volume Two contains the requirements for—
Class 1 and 10a buildings (other than access requirements for people with a disability in Class 1b and 10a (a)
buildings); and
certain Class 10b structures (other than access requirements for people with a disability in Class 10b swimming (b)
pools ); and
Class 10c private bushfire shelters . (c)
A1G3 Scope of NCC Volume Three
[New for 2022]
(1) NCC Volume Three contains technical requirements for the design, construction, installation, replacement, repair,
alteration and maintenance for plumbing and drainage systems in new and existing buildings.
(2) NCC Volume Three applies to these systems in all classes of buildings whenever plumbing and drainage work is
carried out.
(3) NCC Volume Three additionally applies to sites where services are designed, constructed, installed, replaced,
repaired, altered and maintained independently of buildings.
(4) NCC Volume Three applies from the point of connection to the point of discharge.
A1G4 Interpretation
[2019: A1.0]
(1) The following components of the NCC are non-mandatory and informative:
Content identified as “explanatory information”. (a)
The “Introduction” information, located at the beginning of each Volume, Section or Part. (b)Part A1 Interpreting the NCC
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 30(2) Words in italics must be interpreted in accordance with ─
definitions provided in Schedule 1, unless the contrary intention appears; and (a)
additional definitions in State or Territory appendices, as appropriate. (b)
(3) The NCC must be interpreted and applied in accordance with the following:
A reference to a building is a reference to an entire building or part of a building (as the case requires). (a)
A reference to plumbing or drainage solution , or product in Volume Three is a reference to an entire installation, (b)
system or product , or part of an installation, system or product (as the case requires).
A reference in a Performance Requirement to “the degree necessary” means ─ (c)
that consideration of all the criteria referred to in the Performance Requirement will determine the outcome (i)
appropriate to the circumstances; and
that in certain cases it may not be necessary to incorporate any specific measures to meet the relevant (ii)
Performance Requirement .
An “Application” statement is mandatory and is provided to specify where and when a requirement or provision (d)
applies.
A “Limitation” statement is mandatory and is provided to specify where and when the application of a requirement (e)
or provision is limited to a certain circumstance.
An “Exemption” statement is mandatory and is provided to specify where or when a requirement or provision (f)
does not need to be complied with.
A “Note” is part of a provision or requirement and provides additional mandatory instructions. (g)
Figures in the NCC ─ (h)
are used to illustrate specific issues referenced in the associated text; and (i)
are not to be construed as containing all design information that is required for that particular building (ii)
element or situation.
The definitions, symbols and abbreviations listed in Schedule 1. (i)
(4) A reference to a building class is a reference to all the sub-classifications of that class.
(5) The following sub-classifications apply:
Classes 1a and 1b are sub-classifications of Class 1. (a)
Classes 7a and 7b are sub-classifications of Class 7. (b)
Classes 9a, 9b and 9c are sub-classifications of Class 9. (c)
Classes 10a, 10b and 10c are sub-classifications of Class 10. (d)
(6) A reference to a sub-classification is solely to that sub-classification.
TAS A1G4(7)
Notes
For Volume Three, if a word is not defined in Schedule 1, the meaning (if any) attributed to it under AS/NZS 3500.0
should be used unless the contrary intention appears.
Explanatory Information
Explanatory information and Introduction information contained in the NCC is non-mandatory and is provided for
guidance purposes only. This informative material should be read in conjunction with the technical provisions of the
NCC. Any statements made in the informative and guidance components of the NCC should not be taken to override
the NCC. Unlike the NCC, which is adopted by legislation, the informative and guidance components are not called up
into legislation and they do not cover State and Territory variations and additions. Because informative and guidance
components of the NCC do not have regulatory force, the ABCB accepts no responsibility for its contents when applied
to specific buildings or any liability which may result from its use.
Defined words provide the precise meaning and expressions of key words used for understanding and complying with
the NCC. Where a word is not defined in the NCC, the relevant common meaning of the word should be used.
Generally, a reference to a building is a reference to the whole building, regardless of classification. However, when a A1G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 31provision is applicable to a specific class or classes of building, that reference to a building may be a reference to the
whole building or part of the building depending on how the building is classified.
Classes 1a and 1b, 7a and 7b, 9a, 9b and 9c, and 10a, 10b and 10c are separate classifications. In the NCC, when the
designation ‘a’, ‘b’ or ‘c’ is not applied, the reference is to all buildings of the general class. For example, ‘Class 9b’
refers only to Class 9b buildings, but ‘Class 9’ refers to Classes 9a, 9b and 9c.
Whether a provision applies or not depends on the circumstances of the case and the circumstances in which the
reference is made. For example, where a building has a single classification, a reference to a building in the NCC is
understandably a reference to a whole building. However, where a building has parts of different classification, unless
the contrary intention appears (i.e. there is a specific reference to the whole building), a reference to a building in the
NCC is a reference to the relevant part of the building. This means that each part of the building must comply with the
relevant provisions for its classification.
A number of the Performance Requirements of the NCC use the expression “to the degree necessary” or “appropriate
to”. These expressions provide flexibility by allowing appropriate authorities to determine the degree of compliance
necessary in a particular case. Therefore, any part of the NCC that uses these expressions should be referenced against
the requirements of the appropriate authority . For example, an appropriate authority might judge that an item need not
be installed, or a particular level of performance be achieved.
Application, Limitation, and Exemption statements are used to identify provisions that may or may not apply in certain
situations, to varying degrees.
Figures are used to explain the requirements of a particular clause. To ensure the context of the requirement is clearly
understood, adjacent construction elements of the building that would normally be required in that particular situation
are not always shown. Accordingly, aspects of figures that are not shown should not be interpreted as meaning these
construction details are not required . Therefore a figure must not be used as an indication of the full construction
requirements in a given situation, as the only available option, or a substitute for referencing appropriate construction
requirements (in other sources) for a given clause. A1G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 32
Introduction to this Part
This Part explains the possible methods of demonstrating compliance with the NCC. It explains the various compliance
pathways within the NCC and the appropriate steps that must be taken for each of these pathways.
A2G1 Compliance
[2019: A2.0, A2.1]
(1) Compliance with the NCC is achieved by complying with—
the Governing Requirements of the NCC; and (a)
the Performance Requirements . (b)
(2) Performance Requirements are satisfied by one of the following, as shown in Figure A2G1 :
Performance Solution . (a)
Deemed-to-Satisfy Solution . (b)
A combination of (a) and (b). (c)
Figure A2G1: NCC compliance structure
A2G2 Performance Solution
[2019: A2.2]
(1) A Performance Solution is achieved by demonstrating—
compliance with all relevant Performance Requirements ; or (a)
the solution is at least equivalent to the Deemed-to-Satisfy Provisions . (b)
(2) A Performance Solution must be shown to comply with the relevant Performance Requirements through one or a
combination of the following Assessment Methods :
Evidence of suitability in accordance with Part A5 that shows the use of a material, product, plumbing and (a)
drainage product , form of construction or design meets the relevant Performance Requirements .
A Verification Method including the following: (b)
The Verification Methods provided in the NCC. (i)
Other Verification Methods , accepted by the appropriate authority that show compliance with the relevant (ii)
Performance Requirements . Part A2 Compliance with the NCC
Governing Requirements
PERFORMANCE REQUIREMENTS
PERFORMANCE
SOLUTIONDEEMED-TO-SATISFY
SOLUTIONand/orCompliance Level
Compliance Solutions
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 33Expert Judgement . (c)
Comparison with the Deemed-to-Satisfy Provisions . (d)
(3) Where a Performance Requirement is satisfied entirely by a Performance Solution , in order to comply with (1) the
following method must be used to determine the Performance Requirement or Performance Requirements relevant
to the Performance Solution :
Identify the relevant Performance Requirements from the Section or Part to which the Performance Solution (a)
applies.
Identify Performance Requirements from other Sections or Parts that are relevant to any aspects of the (b)
Performance Solution proposed or that are affected by the application of the Performance Solution .
(4) Where a Performance Requirement is proposed to be satisfied by a Performance Solution , the following steps must
be undertaken:
Prepare a performance-based design brief in consultation with relevant stakeholders. (a)
Carry out analysis, as proposed by the performance-based design brief . (b)
Evaluate results from (4)(b) against the acceptance criteria in the performance-based design brief . (c)
Prepare a final report that includes— (d)
all Performance Requirements and/or Deemed-to-Satisfy Provisions identified through A2G2(3) or A2G4(3) (i)
as applicable; and
identification of all Assessment Methods used; and (ii)
details of steps (4)(a) to (4)(c); and (iii)
confirmation that the Performance Requirement has been met; and (iv)
details of conditions or limitations, if any exist, regarding the Performance Solution . (v)
VIC A2G2(5)
A2G3 Deemed -to-Satisfy Solution
[2019: A2.3]
(1) A solution that complies with the Deemed-to-Satisfy Provisions is deemed to have met the Performance
Requirements .
(2) A Deemed-to-Satisfy Solution can show compliance with the Deemed-to-Satisfy Provisions through one or more of
the following Assessment Methods :
Evidence of suitability in accordance with Part A5 that shows the use of a material, product, plumbing and (a)
drainage product , form of construction or design meets a Deemed-to-Satisfy Provision .
Expert Judgement . (b)
A2G4 A combination of solutions
[2019: A2.4]
(1) Performance Requirements may be satisfied by using a combination of Performance Solutions and Deemed-to-
Satisfy Solutions .
(2) When using a combination of solutions, compliance can be shown through the following, as appropriate:
A2G2 for assessment against the relevant Performance Requirements . (a)
A2G3 for assessment against the relevant Deemed-to-Satisfy Provisions . (b)
(3) Where a Performance Requirement is satisfied by a Performance Solution in combination with a Deemed-to-Satisfy
Solution , in order to comply with (1), the following method must be used to determine the Performance Requirement
or Performance Requirements relevant to the Performance Solution :
Identify the relevant Deemed-to-Satisfy Provisions of each Section or Part that are to be the subject of the (a)
Performance Solution .
Identify the Performance Requirements from the same Sections or Parts that are relevant to the identified (b)A2G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 34Deemed-to-Satisfy Provisions .
Identify Performance Requirements from other Sections or Parts that are relevant to any aspects of any (c)
Performance Solution proposed or that are affected by the application of the Deemed-to-Satisfy Provisions that
are the subject of the Performance Solution .
Explanatory Information
To comply with the NCC, a solution must achieve compliance with the Governing Requirements and the Performance
Requirements . The Governing Requirements contain requirements about how the Performance Requirements must be
met.
Performance Requirements outline the minimum necessary standards different buildings or building elements must
attain. The Performance Requirements are the only NCC technical provisions that must be satisfied.
In some instances, State and Territory variations and additions may also be applicable to certain Performance
Requirements .
A solution may be partly a Performance Solution and partly a Deemed-to-Satisfy Solution . However, no matter what
method is chosen, building proponents need to always meet the Performance Requirements of the NCC.
A2G2(2)(b)(ii) provides for the use of Verification Methods that are not listed in the NCC. A Verification Method may
include—
a calculation, using analytical methods or mathematical models; or •
a test, using a technical procedure, either on-site or in a laboratory, to directly measure the extent to which the •
Performance Requirements have been met; or
an inspection (and inspection report); or •
any other acceptable form of certification. •
Any Verification Method used must be acceptable to the appropriate authority .
A Performance Solution must comply with all applicable Performance Requirements of the NCC. A Performance Solution
provides a tailored solution to meet the intended objective of the Performance Requirements . A Performance Solution
must comply with all relevant Performance Requirements and must be verified using one or a combination of the
following Assessment Methods :
Evidence of suitability. •
Verification Method . •
Expert Judgement . •
Comparison with the Deemed-to-Satisfy Provisions . •
For example, building proponents who wish to know what has to be done to satisfy the fire safety Performance
Requirements for a particular building can either follow the Deemed-to-Satisfy Provisions or develop a Performance
Solution . Guidance on how to develop Performance Solutions can be found on the ABCB website at: www.abcb.gov.au.
The ABCB Resource Library contains information on the development of Performance Solutions for both building and
plumbing.
A Deemed-to-Satisfy Solution is achieved by following all appropriate Deemed-to-Satisfy Provisions in the NCC. The
Deemed-to-Satisfy Provisions are prescriptive (i.e. like a recipe book, they tell you how, what and in which location
things must be done). They include materials, components, design factors, and construction methods that, if used, are
deemed to meet the Performance Requirements , hence the term “Deemed-to-Satisfy”.
A Deemed-to-Satisfy Solution may be verified using one or a combination of the following Assessment Methods :
Evidence of suitability. •
Expert Judgement . •
Some Performance Requirements are without Deemed-to-Satisfy Solutions . Compliance with these Performance
Requirements must be achieved by using a Performance Solution .
When designing a building or plumbing or drainage system, both Performance Solutions and Deemed-to-Satisfy
Solutions can be used to achieve compliance with Performance Requirements . A combination of solutions may be used
to satisfy a single Performance Requirement . This may include occasions where a specific Performance Requirement
covers a number of elements of a building or plumbing or drainage system.
No NCC provision can be considered in isolation. Any departure from the Deemed-to-Satisfy Provisions for a A2G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 35Performance Solution needs to be assessed against the relevant Performance Requirements within the relevant NCC
Section or Part. Additionally, the proposed Performance Solution may also impact on other Performance Requirements
in other Sections or Parts. Thus, these additional Performance Requirements need to be considered in relation to the
subject Performance Solution . A2G2(3) and A2G4(3) set out the methods for determining which Performance
Requirements are relevant.
It is important that a holistic approach is used when determining the appropriate Performance Requirements .
A2G4(2)(a) references A2G2 . Therefore, when using a combination of Performance Solutions and Deemed-to-Satisfy
Solutions it is necessary to comply with A2G2(4) where a Performance Requirement is proposed to be satisfied by a
Performance Solution .
More information on NCC compliance methods is located at www.abcb.gov.au. A2G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 36
Introduction to this Part
This Part explains applying the NCC in accordance with State or Territory legislation. The NCC has legal effect through
references in relevant State or Territory building and plumbing legislation.
Although the NCC is a nationally consistent code, there are some situations where a State or Territory enforces a variation,
addition or deletion to it. This Part also explains how these variations, additions and deletions apply.
A3G1 State and Territory compliance
[2019: A3.0]
(1) For application within a particular State or Territory, the volumes of the NCC comprise inclusively of—
Sections A to G, I and J and associated schedules of Volume One; and (a)
Sections A and H and associated schedules of Volume Two; and (b)
Sections A to E and associated schedules of Volume Three. (c)
(2) State and Territory variations, additions and deletions must be complied with in conjunction with the NCC.
(3) The NCC is subject to, and may be overridden by, State or Territory legislation.
(4) State and Territory variations, additions and deletions are contained in the following Schedules:
Schedule 3: Commonwealth of Australia. (a)
Schedule 4: Australian Capital Territory. (b)
Schedule 5: New South Wales. (c)
Schedule 6: Northern Territory. (d)
Schedule 7: Queensland. (e)
Schedule 8: South Australia. (f)
Schedule 9: Tasmania. (g)
Schedule 10: Victoria. (h)
Schedule 11: Western Australia. (i)
(5) State and Territory variations and deletions are identified throughout the NCC.
Explanatory Information
The NCC is given legal effect by building regulatory legislation in each State and Territory. This legislation consists of
an Act of Parliament and subordinate legislation which empowers the regulation of certain aspects of building and
plumbing, and contains the administrative provisions necessary to give effect to the legislation.
Although the NCC is a national code, in some instances it is necessary for a State or Territory to vary or apply additional
requirements specific to their jurisdiction. A3G1(2) highlights that these variations, additions or deletions must be applied
in conjunction with the NCC provisions. Typically, these variations, additions or deletions override the requirements
contained within the NCC.
Any provision of the NCC may be overridden by, or subject to, State or Territory legislation. The NCC must therefore be
read in conjunction with that legislation. Any queries on such matters should be referred to the State or Territory authority
responsible for building and plumbing regulatory matters.
Where a requirement or provision of the NCC is subject to a State or Territory variation, addition, or deletion, a reference
to the appropriate provision in the applicable State or Territory schedule is included with that requirement or provision. Part A3 Application of the NCC in States and Territories
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 37
Introduction to this Part
This Part explains how documents referenced in the NCC are adopted and applied. The NCC itself does not contain details
of every design and construction requirement for a building or plumbing or drainage system. As such, the NCC calls upon
or “references” other documents with this information. These are called NCC referenced documents. Examples of such
documents are Australian Standards, ABCB protocols, ABCB standards and other publications.
There are multiple types of referenced documents. A primary referenced document is one referenced in Schedule 2 of the
NCC. A secondary referenced document is one referenced in a primary referenced document. Other referenced documents
are referenced by secondary and subsequently referenced documents.
A4G1 Referenced documents
[2019: A4.0]
(1) A reference in the NCC to a document refers to the edition or issues and any amendment listed in Schedule 2.
(2) A document referenced in the NCC is only applicable in the context in which the document is quoted.
TAS A4G1(3)
(3) Where a new edition, issue or amendment of a primary referenced document is not listed in Schedule 2, the new
edition, issue or amendment is not referenced for the purpose of the NCC.
(4) Any document referenced in a primary referenced document is known as a secondary referenced document.
(5) A reference in a primary referenced document to a secondary or other referenced document is a reference to the
document as it existed at the time of publication of the primary referenced document.
Applications
A4G1 applies to documents referenced in the ABCB Housing Provisions in the same way as for documents referenced
within any other part of the NCC.
Exemptions
If the secondary or other referenced document is also a primary referenced document, A4G1(5) does not apply.
A4G2 Differences between referenced documents and the NCC
[2019: A4.1]
The NCC overrules any difference between the NCC (including the ABCB Housing Provisions) and a primary referenced
document, including any secondary referenced document.
Applications
A4G2 applies to documents referenced in the ABCB Housing Provisions in the same way as for other documents
referenced by Volumes One, Two or Three of the NCC.
Part A4 Referenced documents
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 38 A4G3 Adoption of referenced documents
[2019: A4.2]
The NCC does not require compliance with requirements in relation to the following matters where they are prescribed in
a referenced document:
The rights, responsibilities or obligations between the manufacturer, supplier or purchaser. (a)
The responsibilities of any tradesperson or other building operative, architect, engineer, authority, or other person (b)
or body.
The submission for approval of any material, building component, form or method of construction, to any person, (c)
authority or body other than those empowered under State or Territory legislation to give that approval.
The submission of a material, product, form of construction or design to any person, authority or body for opinion. (d)
Any departure from the NCC, rule, specification or provision at the sole discretion of the manufacturer or (e)
purchaser, or by arrangement or agreement between the manufacturer and purchaser.
Applications
A4G3 applies to documents referenced in the ABCB Housing Provisions in the same way as for documents referenced
within Volumes One, Two or Three of the NCC.
Explanatory Information
Schedule 2 is only mandatory to Deemed-to-Satisfy Provisions , Specifications and Verification Methods . However,
referenced documents are only applicable to the NCC provision that references the document.
A proponent undertaking a Performance Solution can use any element or edition of any document, if they help satisfy
the Performance Requirements . They do not need to use the documents listed in Schedule 2.
Schedule 2 lists the specific edition of the Standard or other document adopted, including any amendments considered
appropriate for Schedule 2, the Deemed-to-Satisfy Provisions , Specifications or Verification Methods . Other editions of
(or amendments to) the referenced document are not adopted and have no standing under the NCC.
A primary referenced document may refer to a secondary referenced document. A4G1(5) stipulates that the secondary
referenced document is the edition of the document that existed at the time of publication of the primary referenced
document. When another edition of (or amendment to) a secondary referenced document is released, subject to the
exemption to A4G1 , that edition (or amendment) is not adopted for the purposes of the primary referenced document.
A4G3 means that contractual matters or clauses defining responsibilities of various parties, and matters not appropriate
for adoption in the NCC are not included when a document is called up in the NCC. A4G3
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 39
Introduction to this Part
This Part explains the evidence needed to show that the NCC requirements are met and the solution is “fit for purpose”.
It covers the use of materials, products, forms of construction and designs. It details separate requirements for the BCA
and PCA.
Examples of evidence to be prepared and retained include certificates, reports, calculations and any other documents or
information showing compliance with the NCC requirements.
A5G1 Suitability
[2019: A5.0]
(1) A building and plumbing or drainage installation must be constructed using materials, products, plumbing products ,
forms of construction and designs fit for their intended purpose to achieve the relevant requirements of the NCC.
(2) For the purposes of (1), a material, product, plumbing product , form of construction or design is fit for purpose if it
is—
supported by evidence of suitability in accordance with— (a)
A5G2 ; and (i)
A5G3 or A5G4 as appropriate; and (ii)
constructed or installed in an appropriate manner. (b)
Explanatory Information
A5G1 relates to the quality of work and materials needed to construct a building to meet NCC requirements.
This means that—
all people involved with construction must work skillfully in accordance with good trade practice; and •
all materials must be of a quality to fulfil their function/s within the building. •
A5G1 only applies to matters normally covered by the NCC.
While A5G1 outlines quality of work and material demands, sometimes additional conditions may be required by—
other Commonwealth, State or Territory legislation; and •
contracts that include either specific quality requirements, or requirements for specific materials and the like. •
Explanatory Information: Example
Permit authorities would ordinarily not apply A5G1 to such matters as—
plastering — other than for fire rating, waterproofing of wet areas , and sound insulation; or •
painting — other than that required for weatherproofing an external wall . •
When determining which form of evidence will be used, it is important to consider the appropriateness of the evidence,
as some forms of evidence may be more suitable to materials and products and others to designs and forms of
construction. The requirement to consider appropriateness of the evidence is specified in A5G2(1) .
Part A5 Documentation of design and construction
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 40 A5G2 Evidence of suitability ─ Volumes One, Two and Three
[2019: A5.1]
(1) The form of evidence used must be appropriate to the use of the material, product, plumbing product , form of
construction or design to which it relates.
(2) Any copy of documentary evidence submitted must be a complete copy of the original certificate, report or document.
Explanatory Information
For further guidance, refer to the ABCB Handbook for Evidence of Suitability.
All copies of documents provided as evidence must be unabridged copies of the originals. No part can be left incomplete.
A5G3 Evidence of suitability ─ Volumes One and Two (BCA)
[2019: A5.2]
(1) Subject to A5G5 , A5G6 , A5G7 and A5G9 , evidence to support that the use of a material, product, form of construction
or design meets a Performance Requirement or a Deemed-to-Satisfy Provision may be in the form of any one, or
any combination of the following:
A current CodeMark Australia or CodeMark Certificate of Conformity . (a)
A current Certificate of Accreditation . (b)
A current certificate, other than a certificate described in (a) and (b), issued by a certification body stating that (c)
the properties and performance of a material, product, form of construction or design fulfil specific requirements
of the BCA.
A report issued by an Accredited Testing Laboratory that— (d)
demonstrates that a material, product or form of construction fulfils specific requirements of the BCA; and (i)
sets out the tests the material, product or form of construction has been subjected to and the results of (ii)
those tests and any other relevant information that has been relied upon to demonstrate it fulfils specific
requirements of the BCA.
A certificate or report from a professional engineer or other appropriately qualified person that— (e)
certifies that a material, product, form of construction or design fulfils specific requirements of the BCA; and (i)
sets out the basis on which it is given and the extent to which relevant standards, specifications, rules, (ii)
codes of practice or other publications have been relied upon to demonstrate it fulfils specific requirements
of the BCA.
Another form of documentary evidence, such as but not limited to a Product Technical Statement , that— (f)
demonstrates that a material, product, form of construction or design fulfils specific requirements of the (i)
BCA; and
sets out the basis on which it is given and the extent to which relevant standards, specifications, rules, (ii)
codes of practice or other publications have been relied upon to demonstrate it fulfils specific requirements
of the BCA.
(2) Evidence to support that a calculation method complies with an ABCB protocol may be in the form of any one, or any
combination of the following:
A certificate from a professional engineer or other appropriately qualified person that— (a)
certifies that the calculation method complies with a relevant ABCB protocol; and (i)
sets out the basis on which it is given and the extent to which relevant standards, specifications, rules, (ii)
codes of practice and other publications have been relied upon.
Another form of documentary evidence that correctly describes how the calculation method complies with a (b)
relevant ABCB protocol.
Applications
A5G3 is only applicable to NCC Volumes One and Two (BCA). A5G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 41Notes
Current documentary evidence, such as a certificate or report, containing references to NCC 2019 provisions remains
valid despite amended provision references in NCC 2022, subject to technical requirements remaining the same
between editions.
Explanatory Information
A5G3 represents the minimum level of documentary evidence needed to show that a material, product, form of
construction or design meets the relevant NCC requirements. The evidence can be required by:
an appropriate authority ; •
a party to a construction contract; or•
a person certifying compliance with the NCC.•
If a building proponent does not produce exactly what is required, the evidence may be rejected.
It should be noted that ‘design’
may refer to engineering design, architectural design as well as product and material
design.
A5G3(1)(f) allows for the use of alternative forms of documentary evidence to those included in A5G3(1)(a) to (e), as
long as they comply with certain specified conditions.
An example of this arises when an authority carries out an inspection of a building site. The inspection alone would not
be acceptable as evidence. However, if the authority compiled a written report detailing findings and conclusions from
the inspection, then it may comply with the requirements of A5G3(1)(f).
A Product Technical Statement detailing the characteristics and merits of a particular product or system is also an
example of another form of documentary evidence.
There is significant reliance by industry on the use of calculation methods, including software programs, for
demonstrating compliance with the NCC. While there is no formal recognition of specific methods, A5G3(2) allows
suitable evidence to be submitted to demonstrate that a calculation method (including a software program) complies
with a relevant ABCB protocol that establishes the characteristics of a suitable calculation method.
If under a Deemed-to-Satisfy Provision a building element is required to have an FRL, then A5G3 may be used to
provide evidence to show that the FRL has been determined in accordance with Specification 1 and 2.
In the case of a test report from an Accredited Testing Laboratory , the report may be either—
the test report referred to in clause 2.16.2 of AS 1530.4 (also referred to as a full test report); or•
the regulatory information report referred to in clause 2.16.3 of AS 1530.4 (also referred to as a short-form report).•
In both cases the report must be an unabridged copy of the original report. A test certificate referred to in clause 2.16.4
of AS 1530.4 on its own is not suitable for showing compliance with the NCC.
If a proposal uses a Deemed-to-Satisfy Provision that requires a building element to have fire hazard properties , then
A5G3 may be used to provide evidence to support the proposal and show that the fire hazard properties have been
determined in accordance with A5G6 .
Refer to the guidance provided in the Guide to Volume One for further information on fire hazard properties which
includes—
Flammability Index ; and •
Spread-of-Flame Index ; and •
Smoke-Developed Index ; and •
a material’s group number ; and •
smoke growth rate index . •
The Deemed-to-Satisfy Provisions of the BCA contain a number of provisions requiring a ceiling to have a resistance
to the incipient spread of fire to the space above itself. A5G7 sets out the method of determining the incipient spread
of fire. The method is based on the method of determining the FRL of a building element and use of the Standard Fire
Test. A5G3
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 42 A5G4 Evidence of suitability ─ Volume Three (PCA)
[2019: A5.3]
(1) Any product that is intended for use in contact with drinking water must comply with the relevant requirements of
AS/NZS 4020, verified in the form of either—
a test report provided by an Accredited Testing Laboratory , in accordance with AS/NZS 4020; or (a)
a WaterMark Licence issued in accordance with (3), if it includes compliance with AS/NZS 4020. (b)
(2) Any product that contains copper alloy and is intended for use in contact with drinking water must have a weighted
average lead content of not more than 0.25% verified in the form of either—
a test report provided by an Accredited Testing Laboratory , in accordance with NSF/ANSI/CAN 372; or (a)
a WaterMark Licence issued in accordance with (3), if it includes compliance with NSF/ANSI/CAN 372. (b)
(3) A product of a type listed on the WaterMark Schedule of Products is deemed to be fit for its intended purpose if it has
a WaterMark Licence issued in accordance with the WaterMark Scheme Rules.
(4) A product of a type listed on the Watermark Schedule of Excluded Products requires evidence of suitability in the
form of—
a current certificate issued by a certification body stating that the properties and performance of a product can (a)
meet the requirements of the PCA; or
a report issued by an Accredited Testing Laboratory that— (b)
demonstrates that the product complies with the relevant requirements of the PCA; and (i)
sets out the tests the product has been submitted to and the results of those tests and any other relevant (ii)
information that has been relied upon to demonstrate suitability for use in a plumbing or drainage installation.
(5) Any product that is not covered by (3) or (4) must be subjected to a risk assessment in accordance with the WaterMark
Scheme Rules.
(6) Evidence to support that a design or system meets the relevant PCA Performance Requirements must be in the form
of any one or any combination of the following:
The design or system complies with a Deemed-to-Satisfy Provision . (a)
The design or system is a Performance Solution from a professional engineer or a recognised expert that— (b)
certifies that the design or system complies with the relevant requirements of the PCA; and (i)
sets out the basis on which it is given and the extent to which relevant standards, specifications, rules, (ii)
codes of practice or other publications have been relied upon.
Any other form of documentary evidence that— (c)
demonstrates that a design or system complies with the relevant requirements of the PCA; and (i)
sets out the basis on which it is given and the extent to which relevant standards, specifications, rules, (ii)
codes of practice or other publications have been relied upon.
TAS A5G4(10)
TAS A5G4(7)
TAS A5G4(8)
TAS A5G4(9)
Notes
On-site wastewater management systems larger than covered by the standards are exempt and a Performance Solution
is required.
Notes
A5G4(2) does not take effect until the completion of the transition period specified by WaterMark Notice of Direction (1)
2021/4.
Note 1 does not prevent the use of products certified in accordance with A5G4(2) prior to the completion of the (2)
transition period specified by the WaterMark Notice of Direction 2021/4. A5G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 43
Applications
Products subject to the requirements of A5G4(2) are specifically nominated in the WaterMark Schedule of Products
and the WaterMark Schedule of Excluded Products .
Exemptions
Products that are used exclusively for non-drinking uses such as manufacturing, industrial processing, irrigation or (1)
any other uses where water is not anticipated to be used for human consumption are excluded from the
requirements of A5G4(2).
Explanatory Information
Some examples of products subject to A5G4(2) include the following:
Copper alloy fittings. •
Stainless-steel braided hoses. •
Valves (such as valves for isolation, backflow prevention, alteration of pressure and temperature). •
Taps and mixers. •
Water meters. •
Pumps (for use with cold and heated water services). •
Water heaters. •
Residential water filtration equipment. •
Water dispensers (such as boiling and cooling units, drinking fountains and bottle fillers). •
Fire sprinkler systems connected to the cold water service that are not isolated from fixtures and fittings intended •
to supply water for human consumption.
Some examples of products excluded from the requirements of A5G4(2) include the following:
Shower heads for bathing. •
Emergency showers, eye wash and/or face wash equipment. •
Pumps used for irrigation, fire-fighting or other non-drinking water purposes. •
Fire-fighting water services and equipment including residential fire sprinklers. •
Appliances, including washing machines and dishwashers. •
Commercial boilers associated with heating, ventilation and air-conditioning systems. •
Sanitary fixtures (such as toilets, cistern inlet valves, bidets and urinals. •
Non-drinking water systems (such as recycled water systems). •
Product certification transition arrangements are outlined in Notices of Direction issued through the WaterMark
Certification Scheme .
Lead is currently permitted in small proportions in the raw materials used to manufacture some plumbing products .
Whilst the allowable lead levels permitted in products manufactured prior to 1 September 2025 ensures compliance
with the Australian Drinking Water Guidelines, the use of products compliant with the lead levels in A5G4(2) is
encouraged, to avoid the potential for adverse effects on human health.
A5G4(1) requires any product intended for use in contact with drinking water to comply with AS/NZS 4020. Compliance
is achieved by passing the relevant tests set out in the Standard.
Evidence of compliance must then be provided in accordance with A5G4(1), under which there are two options. The
first, at A5G4(1)(a), recognises test reports and certificates that cover compliance with AS/NZS 4020 only. The second,
at A5G4(1)(b), recognises WaterMark Licences where compliance with AS/NZS 4020 is a requirement of the relevant
product Standard or WaterMark Technical Specification.
For products that are of a type listed on the WaterMark Schedule of Products , A5G4(2) requires that these products
have a WaterMark Licence . A WaterMark Licence reflects that the product has been certified and authorised in
accordance with the WaterMark Scheme Rules.
For products that are not subject to WaterMark certification (i.e. excluded products ), evidence that can be used to A5G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 44support that the product is fit for its intended purpose is provided in A5G4(3). This may include demonstrating compliance
with a product specification referenced in the WaterMark Schedule of Excluded Products , where one is available.
A5G4(4) provides that any product that is not listed on the WaterMark Schedule of Products or the WaterMark Schedule
of Excluded Products must be subjected to a risk assessment in accordance with the WaterMark Scheme Rules. The
risk assessment will determine whether the product in question requires certification and authorisation, or if it should
be listed as an “excluded product”. This in turn will determine the form of evidence of suitability applicable to the product .
Explanatory Information: What is WaterMark?
The WaterMark Certification Scheme is a mandatory certification scheme for plumbing and drainage products to ensure
that these products are fit for purpose and appropriately authorised for use in a plumbing or drainage system.
The PCA, through Part A5, requires certain plumbing and drainage products to be certified and authorised for use in a
plumbing or drainage system. These products are certified through the WaterMark Certification Scheme and listed on
the WaterMark Product Database.
The WaterMark Certification Scheme is governed by the WaterMark Scheme Rules, which are available for download
from the ABCB website at: www.abcb.gov.au . These rules set out the requirements for risk assessments, evaluation,
certification, and the drafting of WaterMark Technical Specifications.
When a product is listed on the WaterMark Schedule of Products then, for it to be certified and authorised, the product
must—
be tested by an Accredited Testing Laboratory ; and •
comply with an approved product specification (either a relevant existing product Standard or a WaterMark Technical •
Specification); and
be manufactured in accordance with an approved Quality Assurance Program; and •
carry a scope of use. •
Products that comply fully with the applicable requirements of the WaterMark Certification Scheme are then eligible to
be certified by a WaterMark Conformity Assessment Body and listed on the WaterMark Product Database. Certified
products are identifiable by the WaterMark certification trade mark, shown in Figure A5G4 below, that must be displayed
on the product upon granting of a WaterMark Licence .
Figure A5G4 ( e xplanatory ):WaterMark Certification Scheme Trademarks
A5G5 Fire -r esistance of building elements
[2019: A5.4]
Where a Deemed-to-Satisfy Provision requires a building element to have an FRL, it must be determined in accordance
with Specifications 1 and 2.
A5G6 Fire hazard properties
[2019: A5.5]
Where a Deemed-to-Satisfy Provision requires a building component or assembly to have a fire hazard property it must
be determined as follows:
For average specific extinction area , critical radiant flux and Flammability Index , as defined in Specification 1 . (a)
For Smoke-Developed Index and Spread-of-Flame Index , in accordance with Specification 3 . (b)A5G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 45For a material’s group number or smoke growth rate index (SMOGRARC), in accordance with S7C4(2). (c)
A5G7 Resistance to the incipient spread of fire
[2019: A5.6]
A ceiling is deemed to have a resistance to the incipient spread of fire to the space above itself if—
it is identical with a prototype that has been submitted to the Standard Fire Test and the resistance to the incipient (a)
spread of fire achieved by the prototype is confirmed in a report from an Accredited Testing Laboratory that—
describes the method and conditions of the test and form of construction of the tested prototype in full; and (i)
certifies that the application of restraint to the prototype complies with the Standard Fire Test ; or (ii)
it differs in only a minor degree from a prototype tested under (a) and the resistance to the incipient spread of (b)
fire attributed to the ceiling is confirmed in a report from an Accredited Testing Laboratory that—
certifies that the ceiling is capable of achieving the resistance to the incipient spread of fire despite the (i)
minor departures from the tested prototype; and
describes the materials, construction and conditions of restraint that are necessary to achieve the resistance (ii)
to the incipient spread of fire .
A5G8 Labelling of Aluminium Composite Panels
[2019: A5.7]
An Aluminium Composite Panel must be labelled in accordance with SA TS 5344.
A5G9 NatHERS
[New for 2022]
Where house energy rating software is required to be used, evidence of the house energy rating software output must be
in the form of a NatHERS certificate issued in accordance with the NatHERS scheme.A5G6
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 46
Introduction to this Part
The NCC groups buildings and structures by the purpose for which they are designed, constructed or adapted to be used,
assigning each type of building or structure with a classification. This Part explains how each building classification is
defined and used in the NCC.
The building classifications are labelled “Class 1” through to “Class 10”. Some classifications also have sub-classifications,
referred to by a letter after the number (e.g. Class 1a).
The technical building requirements for Class 2 to 9 buildings are mostly covered by Volume One of the NCC and those
for Class 1 and 10 are mostly covered by Volume Two of the NCC. Volume Three of the NCC covers plumbing and drainage
requirements for all building classifications.
A building may have parts that have been designed, constructed or adapted for different purposes. In most cases, each
of these parts is a separate classification. A building (or part of a building) may also have more than one such purpose
and may be assigned more than one classification.
A6G1 Determining a building classification
[2019: A6.0]
(1) The classification of a building or part of a building is determined by the purpose for which it is designed, constructed
or adapted to be used.
(2) Each part of a building must be classified according to its purpose and comply with all the appropriate requirements
for its classification.
(3) A room that contains a mechanical, thermal or electrical facility or the like that serves the building must have the
same classification as the major part or principal use of the building or fire compartment in which it is situated.
(4) Unless another classification is more suitable, an occupiable outdoor area must have the same classification as the
part of the building to which it is associated.
Exemptions
For A6G1(1) where a part of a building has been designed, constructed or adapted for a different purpose and is (1)
less than 10% of the floor area of the storey it is situated on, the classification of the other part of the storey may
apply to the whole storey .
A6G1(3) does not apply to an electricity network substation . (2)
Limitations
Exemption (1) does not apply where the minor use of a building is a laboratory, a Class 9b early childhood centre , or a
Class 2, 3 or 4 part of a building.
Explanatory Information
Classification is a process for understanding risks in a building or part, according to its use. It must be correctly
undertaken to achieve NCC aims as appropriate to each building in each circumstance.
It is possible for a single building to have parts with different classifications. Part of a building can also have more than
one classification. Where there is any conflict between what requirements the part should comply with, the more stringent
requirement applies.
Where it is unclear which classification should apply, appropriate authorities have the discretion to decide. They base
their decision on an assessment of the building proposal. Part A6 Building classification
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 47They will look at what classification the building most closely resembles. They will also take into account the likely fire
load, plus, the likely consequences of any risks to the safety, health and amenity of people using the building.
Appropriate authorities will also look at any relevant court decisions or determinations of the State or Territory body
responsible for considering appeals on building classification matters.
It should be noted that appeals body determinations and, in some States and Territories, certain court decisions are
usually not precedent creating. Such decisions are determined on a case-by-case basis.
It should also be noted that State and Territory authorities responsible for building regulatory matters may have issued
advice, interpretations or guidelines to assist practitioners in applying the correct classification to a building or part.
Advice on such matters should be sought from the relevant authority.
Under Exemption (1) to A6G1, if 10% or less of the floor area of a storey is used for a purpose which could be classified
differently to the remainder of that storey , that part may be classified as being the same as the remainder. Laboratories,
sole-occupancy units in Class 2, 3 or 4 parts, and Class 9b early childhood centres are excluded from this concession
(see Limitation to A6G1). The reason is that laboratories are considered to have a high fire hazard potential and
classifying them with the remainder of the building could, in a majority of cases, endanger occupants of the other parts
of the building which have a lower fire hazard potential. In relation to Class 9b early childhood centres , the intent is to
ensure that these facilities cannot be regarded as another class and that the specific fire safety requirements applicable
to Class 9b early childhood centres are implemented. Also, the intent is not to allow sole-occupancy units in Class 2, 3
or 4 parts to be regarded as another Class such as Class 6 and then not have any fire or sound insulation between the
units and any other classification which may have a high fire load and could endanger the occupants of the Class 2, 3
or 4 part.
If Exemption (1) to A6G1 is used, it should be remembered that it will still be necessary to use the occupant numbers
in Volume One Table D2D18 for the particular use of the area. Likewise, the lighting and equipment levels, people
occupancy and load profiles for the area of minor use for the purposes of Volume One Section J must be in accordance
with the use of the area.
If the storey has a very large floor area , the 10% or less concession area may also be large, even though the rest of
the building is classifiable as a building which ordinarily has a lower risk potential. An example of the application of this
area concession could be as follows:
If a single storey factory has an office that takes up 8% of the whole storey’s floor area , the entire building (including •
the office) can be classified as being Class 8.
However, if that office area takes up 12% of the storey’s floor area , that area must be classified as Class 5, and the •
remainder of the building as Class 8.
Under A6G1(3) a plant room, machinery room, lift motor room or boiler room, have the same classification as the part
of the building they are in. These kinds of rooms do not need to be ancillary or subordinate to the part of the building
they are in, that is, the 10% criterion is not applicable.
There are specific provisions for these kinds of rooms. For example, Volume One Section C requires some of them to
be fire separated from the remainder of the building (e.g. see C3D14 with regard to elements of the electricity supply
system).
A6G2 Class 1 buildings
[2019: A6.1]
(1) A Class 1 building is a dwelling.
(2) Class 1 includes the following sub-classifications:
Class 1a is one or more buildings, which together form a single dwelling including the following: (a)
A detached house. (i)
One of a group of two or more attached dwellings, each being a building, separated by a fire-resisting wall, (ii)
including a row house, terrace house, town house or villa unit.
Class 1b is one or more buildings which together constitute— (b)
a boarding house, guest house, hostel or the like that— (i)
would ordinarily accommodate not more than 12 people; and (A)
have a total area of all floors not more than 300 m2 (measured over the enclosing walls of the building (B)
or buildings); or A6G1
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 48four or more single dwellings located on one allotment and used for short-term holiday accommodation. (ii)
Figure A6G2a: Identification of Class 1 buildings
Figure A6G2b: Typical Class 1 building configurations
ElevationClass 1 Class 2 dwellingClass 2 dwellingSeparating wall
between Class 1
buildings External wall
Class 1
single dwelling
(may be one
or more
storeys)Common wall between Class 1
and Class 2 buildings
Class 2 building containing two or more separate dwellings located one above the other
Plan view(b)3 Class 1 buildings on 2 separate allotments(a) 3 Class 1 buildings on 3 separate allotmentsSeparating wallA6G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 49 Figure A6G2c: Domestic allotment — classification of buildings and structures
Notes
Figures A6G2a , A6G2b and A6G2c illustrates requirements of this provision.
Limitations
For A6G2, a Class 1 building cannot be located above or below another dwelling or another class of building, other
than a private garage .
Explanatory Information
Class 1 buildings are primarily covered in Volumes Two and Three of the NCC. Class 1 buildings are not located above
or below another dwelling, or another class of building other than a private garage .
A sole-occupancy unit used for residential purposes located over another sole-occupancy unit used for residential
purposes will always be a Class 2 or Class 3 building (depending on the circumstances). It cannot be a Class 1 building.
A single Class 1 dwelling can be made up of more than one building. For example, it may include what is ordinarily
called a house, plus one or more habitable ‘outbuildings’ such as sleepouts. Note that a habitable building such as a
sleepout cannot be classified as a Class 10 building.
The height or number of storeys of a Class 1 building makes no difference to its classification.
Class 1b buildings used for short-term holiday accommodation include cabins in caravan parks, tourist parks, farm stay,
holiday resorts and similar tourist accommodation. This accommodation itself is typically rented out on a commercial
basis for short periods and generally does not require the signing of a lease agreement. Short-term accommodation
can also be provided in a boarding house, guest house, hostel, bed and breakfast accommodation or the like.
Unlike a Class 1b building described in A6G2(2)(a), a Class 1b building described in A6G2(2)(b) does not have any
floor area limitation. Therefore, if 4 or more single dwellings are located on the one allotment and used for short-term
holiday accommodation, each single dwelling would be classified as a Class 1b building regardless of the floor area of
each dwelling or the combined floor area of all of the dwellings.
See also Volume One D4D2(3) which contains an explanation of what is considered to be “one allotment”.
The Class 1b classification can attract concessions applicable to Class 3 buildings. These concessions allow people to
rent out rooms in a house, or run a bed and breakfast, without having to comply with the more stringent Class 3
requirements. The reasoning is that the smaller size of the building and its lower number of occupants represents
reduced fire risks. Class 1 – sleepout
Class 10a shedClass 1Class 10b
allotment fence
Class 10a carportClass 10b
swimming pool
Plan viewClass 1
(a)Class 10 attachedand Class 10b(b) Class 1 part and
Class 10 detatchedA6G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 50Apart from their use, the primary difference between Class 1a and Class 1b buildings is that the latter is required to
have a greater number of smoke alarms and in some circumstances, access and features for people with a disability.
A6G3 Class 2 buildings
[2019: A6.2]
(1) A Class 2 building is a building containing two or more sole-occupancy units .
(2) Each sole-occupancy unit in a Class 2 building must be a separate dwelling.
Explanatory Information
A Class 2 building is one that includes more than one dwelling, each of which is generally solely occupied by one or
more people to the exclusion of others.
Such buildings must not be otherwise classified as a Class 1 or Class 3 building or Class 4 part. See Explanatory Figure
A6G3a for a typical configuration of Class 1 and Class 2 buildings.
Where a sole-occupancy residential unit is located above another sole-occupancy residential unit, the building containing
the units can be either a Class 2 or a Class 3 building, depending on the other circumstances of the building proposal.
Class 2 buildings can be single storey attached dwellings. Where there is any common space below such dwellings,
they are Class 2 (and cannot be Class 1) irrespective of whether the space below is a storey or not (see Explanatory
Figure A6G3b ).
Class 2 buildings can be attached to buildings of another class. The attached Class 2 buildings need not be attached
to one another, and need not be more than a single storey .
When two or more dwellings are attached to another class, they cannot be Class 4 parts, as any building can only
contain one Class 4 dwelling.
Figure A6G3a (e xplanatory ):Section showing a typical configuration of Class 1 and Class 2 buildings (wit h
non-combustible r oof coverings )
ElevationClass 2 building
containing two or moreseparate dwellingslocated one above the otherClass 2 dwelling
Class 2 dwellingClass 1 single
dwelling
(may be one or
more storeys)Common wall betweenClass 1 and Class 2 buildingsA6G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 51 Figure A6G3b ( explanatory ):Elevation showing a single storey of Class 2 with a common area below
A6G4 Class 3 buildings
[2019: A6.3]
(1) A Class 3 building is a residential building providing long-term or transient accommodation for a number of unrelated
persons.
(2) Class 3 buildings include the following:
A boarding house, guest house, hostel, lodging house or backpacker accommodation. (a)
A residential part of a hotel or motel. (b)
A residential part of a school . (c)
Accommodation for the aged, children, or people with disability. (d)
A residential part of a health-care building which accommodates members of staff. (e)
A residential part of a detention centre . (f)
A residential care building . (g)
Limitations
For A6G4, a Class 3 building is not a Class 1 or 2 building but may be a mixture of Class 3 and another class.
Explanatory Information
Class 3 buildings provide accommodation for unrelated people. The length of stay is unimportant.
Some exceptions to this classification include: certain bed and breakfast accommodation, boarding houses, guest
houses, hostels, or lodging houses and the like which fall within the concession provided for Class 1b buildings.
Also, any sized building can be classified as Class 1 or Class 2 if it is used to house any number of unrelated people
who jointly own or rent it, or share it on a non-rental basis with an owner or tenant.
It is not unusual for a manager’s, owner’s or caretaker’s dwelling attached to a Class 3 building to be thought of as a
Class 4 part of the Class 3 building. However, a Class 4 part of a building can only be part of a Class 5-9 building.
Accordingly, such dwellings are either classified as Class 1, Class 2 or Class 3, depending on the circumstances of the
building proposal. However, a building could be a mixture of Class 3 and another class.
Class 3 buildings include—
the residential parts of hotels and motels; and •
hotel or motel caretakers’, managers’ or owners’ flats, noting that under certain circumstances such dwellings could •Common areaDwelling
Finished groundDwelling DwellingA6G3
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 52be Class 1, Class 2 or Class 3 buildings; and
dormitory accommodation, in schools or elsewhere, noting that a dormitory is generally (but not always) considered •
to be a sole-occupancy unit ; and
bed and breakfast accommodation, a boarding house, guest house, hostel, or lodging house; and •
backpackers’ accommodation; and •
a building which houses elderly people or other people who require special care (in some States or Territories it is •
not acceptable for a Class 1b building to be used to house elderly people or other people who require special care
- it is recommended the local building regulatory body be consulted); and
workers’ quarters, including shearers’ or fruit pickers’ accommodation, or hotel workers’ accommodation. •
A6G5 Class 4 buildings
[2019: A6.4]
Class 4 is a dwelling in a Class 5, 6, 7, 8 or 9 building if it is the only dwelling in the building.
Explanatory Information
Class 4 classification applies to some types of accommodation located within a Class 5-9 building. The most common
include a caretaker’s flat within a building; and accommodation over or otherwise connected to a shop.
A Class 4 part cannot be located within a Class 1, Class 2 or Class 3 building. There can only be one Class 4 dwelling
in a building. If there are two or more dwellings, they are Class 1, Class 2, or possibly Class 3. These Class 1, Class 2
or Class 3 parts need not be attached to one another, nor be more than a single storey .
Where a Class 4 part of a building is rented out for accommodation purposes, it retains its Class 4 classification.
However, if any other part of the principal building is used for accommodation, for example, the attached shop is
converted into an additional flat, both flats become classifiable as Class 2 or, depending on their use, possibly Class 3.
A6G6 Class 5 buildings
[2019: A6.5]
A Class 5 building is an office building used for professional or commercial purposes.
Explanatory Information
Class 5 buildings include professional chambers or suites, lawyers’ offices, government offices, advertising agencies
and accountants’ offices.
NSW A6G7
SA A6G7
A6G7 Class 6 buildings
[2019: A6.6]
(1) A Class 6 building is a shop or other building used for the sale of goods by retail or the supply of services direct to
the public.
(2) Class 6 buildings include the following:
An eating room, cafe, restaurant, milk or soft-drink bar. (a)
A dining room, bar area that is not an assembly building , shop or kiosk part of a hotel or motel. (b)
A hairdresser’s or barber’s shop, public laundry, or undertaker’s establishment. (c)
A supermarket or sale room, showroom, or service station . (d)
A6G4
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 53Explanatory Information
A Class 6 building is a building where goods or services are directly sold or supplied to the public. Examples of a Class
6 building may include—
a place where food or drink may be purchased such as a café or restaurant; or •
a dining room, bar area that is not an assembly building , shop or kiosk part of a hotel or motel; or •
a hairdresser’s or barber’s shop, public laundry, veterinarian; or •
supermarket or sale room, florist, showroom, or service station . •
Service stations are Class 6 buildings. These are outlets used for the servicing of cars and the selling of fuel or other
goods. The expression ‘ service station ’ is not intended to cover buildings where panel beating, auto electrical, muffler
replacement, tyre replacement and the like are solely carried out. Such buildings should be classified as Class 6, Class
7 or Class 8 buildings as the appropriate authority sees fit.
A6G8 Class 7 buildings
[2019: A6.7]
(1) A Class 7 building is a storage-type building.
(2) Class 7 includes the following sub-classifications:
Class 7a — a carpark . (a)
Class 7b — a building that is used for storage, or display of goods or produce for sale by wholesale. (b)
Explanatory Information
There are three basic types of Class 7 building. The first is a carpark as defined in the NCC. The second is a building
used for storage, often referred to as a ‘warehouse’. The third is a building used for the display of goods or produce for
sale by wholesale. ‘Wholesale’ means sale to people in the trades or in the business of ‘on-selling’ goods and services
to another party (including the public).
A6G9 Class 8 buildings
[2019: A6.8]
(1) A Class 8 building is a process-type building.
(2) Class 8 buildings include the following:
A laboratory. (a)
A building in which the production, assembling, altering, repairing, packing, finishing, or cleaning of goods or (b)
produce for sale takes place.
Explanatory Information
The most common way to describe a Class 8 building is as a ‘factory’. However, this can give a simplistic impression
of the types of building which can fall within this classification.
For example—
some laboratories, despite their often small size, have been included as Class 8 buildings principally because of •
their high fire hazard ; and
buildings used for altering or repairing (except service stations , which are specifically included in A6G7 as Class 6 •
buildings); and
potteries; and •
food manufacturers (but not restaurants, which are specifically included in A6G7 as Class 6 buildings); and •
buildings used for the packing or processing of produce, such as a farm or horticultural building. •
A6G7
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 54 A6G10 Class 9 buildings
[2019: A6.9]
(1) A Class 9 building is a building of a public nature.
(2) Class 9 includes the following sub-classifications:
Class 9a — a health-care building including any parts of the building set aside as laboratories, and includes a (a)
health-care building used as a residential care building .
Class 9b — an assembly building including a trade workshop or laboratory in a primary or secondary school . (b)
Class 9c — a residential care building . (c)
Exemptions
A6G10(2)(b) excludes any parts of the building that are of another Class.
Explanatory Information
Class 9a buildings are health-care buildings , including day-care surgeries or procedure units and the like. See definition
of health-care building . Laboratories that are part of a Class 9a building are Class 9a, despite the general classification
of laboratories as Class 8 buildings.
Class 9b buildings are assembly buildings .
These buildings can include—
theatres, cinemas and halls, churches, schools, early childhood centres, kindergartens, preschools and child-•
minding centres; and
indoor cricket, tennis, basketball centres and sport stadiums; and •
nightclubs, discotheques, bar areas providing live entertainment and/or containing a dance floor, public halls, dance •
halls and other places of entertainment; and
snooker halls; and •
bus and railway stations. •
Regarding the Exemption to A6G10(2)(b), a building could be a mixture of Class 9b and another class, or a Class 9b
building could contain parts that are of another class, but be taken as a Class 9b building because of Exemption (1) to
A6G1 .
Class 9c buildings are residential care buildings that may contain residents who have various care level needs.
The Class 9c classification recognises that many residents progress through a continuum of care needs from low to
high. Many older people enter residential care with low care needs (typically Class 3 facilities) but, as they age, require
higher levels of care. In the past, such progression often necessitated the transfer of a hostel resident (Class 3) to a
nursing home (Class 9a). This frequently had negative consequences for the health and well-being of the resident, for
whom the hostel accommodation was home. It also led, at times, to the separation of couples with differing care needs.
Building designers should note that Class 3 buildings include hostels for the accommodation of the aged, and Class 9a
buildings include nursing homes. It is important to be aware, however, that construction of Class 3 or 9a buildings may
restrict the options available to the operators of a facility in relation to the profile of the residents they wish to
accommodate. Where the potential exists for residents of varying care needs to be accommodated, consideration of
the Class 9c provisions may be appropriate. The Class 9c classification allows for any mix of low and high care residents
and is intended to allow the mix to change as the residents’ care needs change over time, without the need to obtain
any further consent or approval from the appropriate authority .
Multi-care level facilities are for residents who may require the full range of care services outlined by the Aged Care
Act. Hence, it is not intended to restrict the resident type and provides maximum flexibility for service providers, residents
and the community.
The NCC provisions for Class 9c buildings are based on minimal on duty on-site staff being available at any time.
However, it is recognised that the staff numbers vary throughout the course of any one day, due to the care needs of
the residents and the functioning of the facility. It is also recognised that the specific care needs of the residents may
result in a greater minimum number of staff.
A6G10
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 55 A6G11 Class 10 buildings and structures
[2019: A6.10]
(1) A Class 10 building is a non-habitable building or structure.
(2) Class 10 includes the following sub-classifications:
Class 10a is a non-habitable building including a private garage , carport, shed or the like. (a)
Class 10b is a structure that is a fence, mast, antenna, retaining wall or free-standing wall or swimming pool or (b)
the like.
Class 10c is a private bushfire shelter . (c)
Explanatory Information
Class 10a buildings are non-habitable buildings. See Explanatory Figure A6G11 for an indication of some Class 10
building configurations.
Class 10b structures are non-habitable structures. There is no requirement for Class 10 buildings to be appurtenant to
a building of any other Class, for example, a small shed standing on its own on an allotment and a toilet block in a park.
A habitable ‘outbuilding’ which is appurtenant to another building is generally part of that building. Again, habitable
‘outbuildings’ cannot be classified as Class 10 buildings.
Typical outbuilding classifications include the following:
A sleepout on the same allotment as a Class 1 building is part of the Class 1 building. •
A detached entertainment room on the same allotment as a Class 1 building, perhaps associated with a swimming •
pool, is part of the Class 1 building.
A small toolshed, used for trade-related hobbies for non-commercial purposes or home repairs, on the same •
allotment as a Class 1 building, would be classified as a Class 10 building.
Provisions relating to Class 10c structures are only intended to address private bushfire shelters associated with a
single Class 1a dwelling. These provisions are contained in Volume Two of the NCC.
Some States or Territories may exempt some Class 10 buildings or structures (often on the basis of height or size) from
the need to have a building permit. Queries on this matter should be referred to the State or Territory body responsible
for regulatory matters.
Figure A6G11 (e xplanatory ):Examples of Class 10 buildings and structures
Class 10a shedClass 2Class 10b
allotment fence
Class 10a
carportClass 10b
swimming pool
Plan viewA6G11
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 56 A6G12 Multiple classifications
[2019: A6.11]
A building (or part of a building) may be designed, constructed or adapted for multiple purposes and have more than one
classification.
Applications
For A6G12, a building (or part of a building) must comply with all the relevant requirements that apply to each of the
classifications for that building (or part of a building).
Explanatory Information: Difficult classifications — Class 2 or Class 3?
There is a fine line between a Class 2 building containing apartments or flats and a Class 3 motel building with units
containing bathroom, laundry and cooking facilities, which may both be made available for short term holiday rental.
When does a Class 3 motel unit become a Class 2 holiday flat and vice versa?
In general, an assessment will be based on the most likely use of the building by appropriate authorities .
Class 3 buildings, where the occupants are generally unfamiliar with the building and have minimum control over the
safety of the building, represent a higher risk level and therefore require higher safety levels. In a case where the
classification is unclear, a decision should be made according to the perceived risks inherent in the use of the building.
Explanatory Information: Difficult classifications — Class 6 or Class 7?
Class 7 buildings include those used to sell goods on the wholesale market, whereas Class 6 buildings are used to sell
goods to the public.
Some establishments claim to sell goods to both the wholesale and retail markets. As a rule, however, if the general
public has access to the building, it is considered a ‘shop’, and therefore a Class 6 building.
Explanatory Information: Difficult classifications — Hot el bars: Class 6 or 9b?
As can be seen from the definition of a Class 6 building, it includes a hotel bar which is not an assembly building . The
bar includes the bar area and associated standing and seating areas. This clarifies that the bar extends beyond the
serving area to include standing and sitting areas where patrons may drink alcohol or other beverages and consume
food. The exclusion of an assembly building means that a bar providing live entertainment or containing a dance floor
is not considered to be Class 6; it must be considered as Class 9b. However, when that use is minor compared with the
remainder of the bar, such as a piano bar or the like where patrons only listen to music and there is no dance floor, the
appropriate authority should exercise judgement on the predominant use and therefore the appropriate classification of
the bar.
A Class 9b building is an assembly building which is defined to include a building where people may assemble for
entertainment, recreational or sporting purposes.
A building may have more than one classification (see A6G12 ).
Explanatory Information: Buildings used for farming purposes
Buildings used for farming-type purposes are often very diverse in nature, occupancy, use and size. In some States or
Territories, appropriate authorities may classify farm buildings as Class 10a, which covers non-habitable buildings. They
would only make this decision if a classification of Class 7 or Class 8 would not be more appropriate.
When making their decision they consider the building’s size, purpose, operations and the extent to which people are
employed in the building. For example, it may be appropriate to classify a shed which is used to store a tractor as a
Class 10a building.
The NCC has definitions of farm building and farm shed which are certain Class 7 and 8 buildings used for farming
purposes. Concessions to specific Deemed-to-Satisfy Provisions apply to farm buildings and farm sheds in recognition
of their often low risk features, and it is recommended that reference is made to the definitions of farm building and
farm shed for further guidance which may assist determination of an appropriate NCC classification.
For example, if people are likely to be employed to stack materials/produce in a storage building or remove
materials/produce from a storage building then a classification of Class 7b may be appropriate. Depending upon whether A6G12
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 57the criteria in the definition of farm shed or farm building have been met, the associated Deemed-to-Satisfy Provisions
in NCC Volume One Part I3 may apply.
Similarly if people are likely to be employed to pack or process materials/produce within a building, or employed to
feed, clean or collect produce from animals or plants within a building then a classification of Class 8 may be appropriate.
Depending upon whether the criteria in the definition of farm shed or farm building have been met, the associated
Deemed-to-Satisfy Provisions in NCC Volume One Part I3 may apply.
However identification of low fire load , low occupant risk and low risk of fire spread should not be used as justification
for choosing a less stringent building classification for a building under the Deemed-to-Satisfy Provisions . For example,
if the intended use of a building is to grow or store a large amount of tomatoes, such as a large greenhouse, and there
is likely to be only one to two persons in the building at any time, it is considered inappropriate to classify the building
as a Class 10a under the Deemed-to-Satisfy Provisions and a classification of Class 7 or Class 8 would be more
appropriate.
The Deemed-to-Satisfy Provisions for a Class 7 or Class 8 farm building or farm shed do not prevent the ability to
consider or develop a Performance Solution for a particular building where the requirements may not be considered
appropriate or are viewed as too stringent. Similarly if a Class 7 or 8 building used for farming purposes does not meet
all the criteria to be considered a farm building or farm shed under the Deemed-to-Satisfy Provisions , this would not
limit the ability to develop a Performance Solution which could contain features similar to those allowed under the
Deemed-to-Satisfy Provisions for farm buildings or farm sheds .
For example, if a Class 8 commercial poultry building meets all the criteria to be considered a farm building under the
Deemed-to-Satisfy Provisions other than the maximum floor area criteria, a Performance Solution could be developed
to demonstrate that the concessions for a farm building under the Deemed-to-Satisfy Provisions are appropriate.
In regards to a farm building or farm shed where the purpose of the building is to park farm vehicles when not in use,
as well as perhaps clean or polish the vehicle(s), it may be appropriate that this type of building is classified as a Class
7a.
However, a number of farm buildings and farm sheds are often not only used for the storage of farm vehicles, but to
store supplies such as fuel, grain or hay. A Class 7a classification may still be appropriate where the majority of the
shed’s space is intended to be designated for the parking of vehicles. However, it may be more appropriate to classify
some types of buildings as Class 7b, rather than Class 7a where a mixed use shed is intended.
Under A6G12 each part of a building (including the entire building) may have more than one classification. This means,
for example, that it is permissible to classify part of a building as a Class 6/7 building, or a Class 5/6 building, or whateve r
is appropriate.
It is expected that this approach may be taken by a builder who is uncertain of what the precise use of a building will
be after its sale, or to maximise the flexibility of the building’s use.
Under the Application to A6G12 , where a building has more than one classification the more stringent Class
requirements will apply. A6G12
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 58
Introduction to this Part
This Part explains how multiple buildings can be considered as a united building. Where adjacent buildings are joined
through openings in walls, they need not meet additional requirements if they jointly comply with the NCC as a single
building.
A7G1 United buildings
[2019: A7.0]
Buildings are deemed united when two or more buildings adjoining each other are connected and used as one building.
Applications
For A7G1, two or more buildings are a united building if they are connected through openings in the walls dividing (1)
them and together comply with all the requirements of the NCC as though they are a single building.
A7G1 only applies to Class 2 to 9 buildings. (2)
A7G2 Alterations in a united building
[2019: A7.1]
If, after alterations or any other building work, two or more of the buildings in A7G1 cease to be connected through openings
in the dividing walls, each of those buildings not now connected must comply with all the requirements for a single building.
Explanatory Information
It is not unusual for authorities to receive plans proposing the connecting of two or more buildings. Connecting buildings
could be achieved by breaking openings through walls, or by joining the buildings by a tunnel, bridge or covered walkway.
When connected, if the buildings jointly comply with all the requirements of the NCC applying as if they were a single
building, they become a united building.
United buildings are not required to comply with additional NCC provisions. For example, any new openings do not
require any form of fire protection not required of a single building.
Note, however, an external wall , which as a result of an interconnection becomes an internal wall , must comply with the
requirements for an internal wall .
Interconnected buildings that do not jointly comply with all the requirements applicable to a single building, remain as
separate buildings.
This raises the possible need for fire doors, or other forms of protection to be fitted to connecting openings.
Explanatory Information: Multiple allotments or ownership
The NCC does not concern itself with actually prohibiting or permitting the uniting of buildings in separate ownership or
on separate allotments. Such matters are dealt with by the relevant local bodies.
Explanatory Information: Example of connection by bridge
In this example, Building A is connected to Building B by bridge C. There are four different options for designing such
a proposal.
The first is a united building: Part A7 United buildings
Governing Requirements
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 59A, B and C are considered as a single structure and comply with the NCC.
The second is three separate buildings:
A, B and C are a fire-source feature to each of the others, and are separated by fire walls with the openings protected
at the points of connection. In this case, C may require independent support and separate egress to a road or open
space, that is not through Buildings A or B. In this case, attention should also be paid to the length of the bridge, as
regards distance of travel to an exit.
The third option is the bridge as a portion of Building A:
In this option, A and C are one building, meeting all requirements of the NCC as a single or united building. B is a
separate building, with suitable fire separation, including fire-doors at the point of interconnection. Bridge C could be
supported off Building A, but not off Building B.
The fourth option is having the bridge as a portion of Building B:
In this option, B and C are one building, meeting all requirements of the NCC as a single or united building. A is a separate building, with suitable fire separation, including fire doors at the point of interconnection. Bridge C could be
supported off Building B, but not off Building A.
In some cases, C will link A and B across a public road, including laneways and the like. Special approvals may be
required from various
appropriate authorities . However, in such cases—
if C is supported by means other than off A and B, such support will generally only be permitted if there is no •
obstruction of the public road; and
care will need to be taken in calculating the distance of travel to an exit if travel is required to be over C and the •
road is wide; and
fire-separation may be necessary at each end of the bridge. •
If the last stipulation is the case, the following matters need consideration:
The bridge would probably need to be of fire-rated construction because combustible construction could provide a •
ready path for the transfer of fire, and non-combustible construction could, in a major fire, distort and collapse onto
the road.
The designer needs to take care that the bridge does not negate the fire separation between the storeys of the •
building. A7G2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 60
S1C1 Scope
[2019: Sch. 5: 1]
This Specification sets out the procedures for determining the FRL of building elements.
S1C2 Rating
[2019: Sch. 5: 2]
A building element meets the requirements of this Specification if—
it is listed in, and complies with Tables S1C2a , S1C2b , S1C2c , S1C2d , S1C2e , S1C2f , S1C2g , S1C2h , S1C2i , (a)
S1C2j , S1C2k , S1C2l , S1C2m or S1C2n of this Specification as applicable; or
it is identical with a prototype that has been submitted to the Standard Fire Test , or an equivalent or more severe (b)
test, and the FRL achieved by the prototype without the assistance of an active fire suppression system is
confirmed in a report from an Accredited Testing Laboratory which—
describes the method and conditions of the test and the form of construction of the tested prototype in full; (i)
and
certifies that the application of restraint to the prototype complied with the Standard Fire Test ; or (ii)
it differs in only a minor degree from a prototype tested under (b) and the FRL attributed to the building element (c)
is confirmed in a report from an Accredited Testing Laboratory which—
certifies that the building element is capable of achieving the FRL despite the minor departures from the (i)
tested prototype; and
describes the materials, construction and conditions of restraint which are necessary to achieve the FRL; (ii)
or
it is designed to achieve the FRL in accordance with— (d)
AS/NZS 2327, AS 4100 and AS/NZS 4600 if it is a steel or composite structure; or (i)
AS 3600 if it is a concrete structure; or (ii)
AS 1720.4 if it is a timber element other than fire-protected timber ; or (iii)
AS 3700 if it is a masonry structure; or (iv)
the FRL is determined by calculation based on the performance of a prototype in the Standard Fire Test and (e)
confirmed in a report in accordance with S1C3 ; or
for fire-protected timber , it complies with Specification 10 where applicable. (f)
Table S1C2a: FRLs deemed to be achieved by walls — masonry
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 . Specification 1 Fire-resistance of building elements
Masonry type Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/1
20180/180/180 240/240/240
Ashlar - - - - 300
Calcium silicate See clause S1C2(d)(iv)
Concrete
Fired clay
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 61 Table S1C2b: FRLs deemed to be achieved by walls — concrete
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2c: FRLs deemed to be achieved by walls — gypsum
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2d: FRLs deemed to be achieved by concrete columns
Table S1C2e: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on not more than 3 sides Concrete type Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/120 180/180/180 240/240/240
No fines - - - 150 300
Prestressed See clause S1C2(d)(iv)
Reinforced
Plain - - - 150 170
Gypsum type Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/1
20180/180/180 240/240/240
Solid gypsum blocks 75 90 100 110 125
Gypsum — perlite or gypsum vermiculite-plaster on metal
lath and channel (non- loadbearing walls only)50 50 65 - -
Column type Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/1
20180/180/180 240/240/240
Prestressed See clause S1C2(d)(ii)
Reinforced
Fire protection Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/120 180/180/180 240/240/240
Concrete cast in-situ —
loadbearing25 30 40 55 75
Concrete cast in-situ —
non-loadbearing
unplastered25 30 40 50 75
Concrete cast in-situ —
non-loadbearing
plastered 13 mm25 25 30 40 50
Gypsum cast in-situ - - - - 50
Gypsum — perlite or
gypsum-vermiculite
plaster—sprayed to
contour20 25 35 50 55S1C2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 62
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2f: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on no more than 3 sides and with column spaces filled
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2g: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on no more than 3 sides and with column spaces unfilled
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2h: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on no more than 4 sides Fire protection Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/120 180/180/180 240/240/240
Gypsum — perlite or
gypsum-vermiculite
plaster—sprayed on
metal lath20 20 25 35 45
Fire protection Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/1
20180/180/180 240/240/240
Solid calcium-silicate masonry 50 50 50 50 65
Solid clay masonry 50 50 50 65 90
Solid concrete masonry 50 50 50 65 90
Solid gypsum blocks 50 50 50 50 65
Hollow terracotta blocks — plastered 13 mm 50 50 50 65 90
Fire protection Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/1
20180/180/180 240/240/240
Solid calcium-silicate masonry 50 50 50 - -
Solid clay masonry 50 50 65 - -
Solid concrete masonry 50 50 65 - -
Solid gypsum blocks 50 50 50 - -
Hollow terracotta blocks — plastered 13 mm 50 50 65 - -
Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Concrete cast in-situ — loadbearing 25 40 45 65 90
Concrete cast in-situ — non- loadbearing unplastered 35 30 40 50 65
Concrete cast in-situ — non- loadbearing plastered 13
mm25 25 30 40 50
Gypsum cast in-situ - - - - 50S1C2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 63
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2i: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on no more than 4 sides and with column spaces filled
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2j: FRLs deemed to be achieved by hot -r olled steel columns (including a fabricated column )
exposed on no more than 4 sides and with column spaces unfilled
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2k: FRLs deemed to be achieved by concrete beams
Table S1C2l: FRLs deemed to be achieved by hot -r olled steel beams (including an open -web joist,
girder, truss, etc.) e xposed on no more than 3 sides
Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Concrete — cast in-situ 25 30 40 50 65Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed to contour25 30 40 55 65
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed on metal lath20 20 30 40 50
Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Solid calcium-silicate masonry 50 50 50 65 75
Solid clay masonry 50 50 50 75 100
Solid concrete masonry 50 50 50 75 100
Solid gypsum blocks 50 50 50 65 75
Hollow terracotta blocks — plastered 13 mm 50 50 50 75 100
Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Solid calcium-silicate masonry 50 50 50 - -
Solid clay masonry 50 50 65 - -
Solid concrete masonry 50 50 65 - -
Solid gypsum blocks 50 50 50 - -
Hollow terracotta blocks — plastered 13 mm 50 50 65 - -
Concrete type Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Prestressed See clause S1C2(d)(ii)
ReinforcedS1C2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 64
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2m: FRLs deemed to be achieved by hot -r olled steel beams (including an open -web joist,
girder, truss, etc.) e xposed on 4 sides
Table Notes
For the purposes of this table, each element must meet the requirements of Specification 2 .
Table S1C2n: FRLs deemed to be achieved by floor, roof or ceiling
S1C3 FRLs determined by calculation
[2019: Sch. 5: 3]
If the FRL of a building element is determined by calculation based on a tested prototype—
the building element may vary from the prototype in relation to— (a)
length and height if it is a wall; and (i)
height if it is a column; and (ii)
span if it is a floor, roof or beam; and (iii)
conditions of support; and (iv)
to a minor degree, cross-section and components; and (v)
the report must demonstrate by calculation that the building element would achieve the FRL if it is subjected to (b)
the regime of the Standard Fire Test in relation to—
structural adequacy (including deflection); and (i)
integrity ; and (ii)
insulation ; and (iii)
the calculations must take into account— (c)
the temperature reached by the components of the prototype and their effects on strength and modulus of (i)
elasticity; and Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed to contour20 25 35 50 55
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed on metal lath20 20 25 35 45
Fire protection Minimum thickness (mm) of principal material for FRLs
60/–/– 90/–/– 120/–/– 180/–/– 240/–/–
Concrete — cast in-situ 25 40 45 60 90
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed to contour20 30 40 55 65
Gypsum — perlite or gypsum-vermiculite plaster —
sprayed on metal lath20 20 35 40 50
Floor, roof or ceiling type Minimum thickness (mm) of principal material for FRLs
60/60/60 90/90/90 120/120/120 180/180/180 240/240/240
Prestressed See clause S1C2(d)(ii)
ReinforcedS1C2
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 65appropriate features of the building element such as support, restraint, cross-sectional shape, length, height, (ii)
span, slenderness ratio, reinforcement, ratio of surface area to mass per unit length, and fire protection;
and
features of the prototype that influenced its performance in the Standard Fire Test although these features (iii)
may not have been taken into account in the design for dead and live load; and
features of the conditions of test, the manner of support and the position of the prototype during the test, (iv)
that might not be reproduced in the building element if it is exposed to fire; and
the design load of the building element in comparison with the tested prototype. (v)
S1C4 Interchangeable materials
[2019: Sch. 5: 4]
(1) Concrete and plaster — An FRL achieved with any material of Group A, B, C, D or E as an ingredient in concrete or
plaster, applies equally when any other material of the same group is used in the same proportions:
Group A: any portland cement. (a)
Group B: any lime. (b)
Group C: any dense sand. (c)
Group D: any dense calcareous aggregate, including any limestone or any calcareous gravel. (d)
Group E: any dense siliceous aggregate, including any basalt, diorite, dolerite, granite, granodiorite or trachyte. (e)
(2) Perlite and vermiculite — An FRL achieved with either gypsum-perlite plaster or gypsum-vermiculite plaster applies
equally for each plaster.
S1C5 Columns covered with lightweight construction
[2019: Sch. 5: 5]
If the fire-resisting covering of a steel column is lightweight construction , the construction must comply with Volume One
C2D9 and C4D17.
S1C6 Non -loadbearing element s
[2019: Sch. 5: 6]
If a non- loadbearing element is able to be used for a purpose where the Deemed-to-Satisfy Provisions prescribe an FRL
for structural adequacy , integrity and insulation , that non- loadbearing element need not comply with the structural adequacy
criteria.S1C3
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 66
S2C1 Scope
[New for 2022]
This Specification sets out the descriptions of elements referred to in Tables S1C2a , S1C2b , S1C2c , S1C2e , S1C2f ,
S1C2g , S1C2h , S1C2i , S1C2j , S1C2l and S1C2m of Specification 1 .
S2C2 Mortar for masonry
[2019: Sch. 5 (Annex ): 1.1]
Masonry units of ashlar, calcium silicate, concrete or fired clay (including terracotta blocks) must be laid in cement mortar
or composition mortar complying with the relevant provisions of AS 3700.
S2C3 Gypsum blocks
[2019: Sch. 5 (Annex ): 1.2]
Gypsum blocks must be laid in gypsum-sand mortar or lime mortar.
S2C4 Gypsum-sand mor tar and plaster
[2019: Sch. 5 (Annex ): 1.3]
Gypsum-sand mortar and gypsum-sand plaster must consist of either—
not more than 3 parts by volume of sand to 1 part by volume of gypsum; or (a)
if lime putty is added, not more than 2.5 parts by volume of sand to 1 part by volume of gypsum and not more (b)
than 5% of lime putty by volume of the mixed ingredients.
S2C5 Gypsum-perlit e and gypsum -vermiculite plaster
[2019: Sch. 5 (Annex ): 1.4]
Gypsum-perlite or gypsum-vermiculite plaster must be applied—
in either one or 2 coats each in the proportions of 1 m3 of perlite or vermiculite to 640 kg of gypsum if the required (a)
thickness of the plaster is not more than 25 mm; and
in 2 coats if the required thickness is more than 25 mm, the first in the proportions of 1 m3 of perlite or vermiculite (b)
to 800 kg of gypsum and the second in the proportions of 1 m3 of perlite or vermiculite to 530 kg of gypsum.
S2C6 Plaster of cement and sand or cement, lime and sand
[2019: Sch. 5 (Annex ): 1.5]
Plaster prescribed in Tables S1C2c , S1C2e , S1C2f , S1C2g , S1C2h , S1C2i , S1C2j , S1C2l and S1C2m —
must consist of cement and sand or cement, lime and sand; and (a)
may be finished with gypsum, gypsum-sand, gypsum-perlite or gypsum-vermiculite plaster or with lime putty. (b)
S2C7 Plaster reinforcement
[2019: Sch. 5 (Annex ): 1.6]
If plaster used as fire protection on walls is more than 19 mm thick— Specification 2 Descriptions of elements referred to in Specification 1
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 67it must be reinforced with expanded metal lath that— (a)
has a mass per unit area of not less than 1.84 kg/m2; and (i)
has not fewer than 98 meshes per metre; and (ii)
is protected against corrosion by galvanising or other suitable method; or (iii)
it must be reinforced with 13 mm x 13 mm x 0.7 mm galvanised steel wire mesh securely fixed at a distance (b)
from the face of the wall of not less than ⅓ of the total thickness of the plaster .
S2C8 Ashlar stone masonry
[2019: Sch. 5 (Annex ): 2]
Ashlar masonry must not be used in a part of the building containing more than 2 storeys , and must not be of—
aplite, granite, granodiorite, quartz dacite, quartz diorite, quartz porphyrite or quartz porphyry; or (a)
conglomerate, quartzite or sandstone; or (b)
chert or flint; or (c)
limestone or marble. (d)
S2C9 Dimensions of masonry
[2019: Sch. 5 (Annex ): 3 ]
The thicknesses of masonry of calcium-silicate, concrete and fired clay are calculated as set out in S2C10 to S2C12 .
S2C10 Solid units
[2019: Sch. 5 (Annex ): 3.1]
For masonry in which the amount of perforation or coring of the units does not exceed 25% by volume (based on the
overall rectangular shape of the unit) the thickness of the wall must be calculated from the manufacturing dimensions of
the units and the specified thickness of the joints between them as appropriate.
S2C11 Hollow units
[2019: Sch. 5 (Annex ): 3.2]
For masonry in which the amount of perforation or coring of the units exceeds 25% by volume (based on the overall
rectangular shape of the unit) the thickness of the wall must be calculated from the equivalent thicknesses of the units
and the specified thickness of the joints between them as appropriate.
S2C12 Equivalent thickness
[2019: Sch. 5 (Annex ): 3.3]
The equivalent thickness of a masonry unit is calculated by dividing the net volume by the area of one vertical face.
S2C13 Height -to-t hickness ratio of certain walls
[2019: Sch. 5 (Annex ): 5]
The ratio of height between lateral supports to overall thickness of a wall of ashlar, no-fines concrete, unreinforced concrete ,
solid gypsum blocks, gypsum-perlite or gypsum-vermiculite plaster on metal lath and channel, must not exceed—
20 for a loadbearing wall; or (a)
27 for a non- loadbearing wall. (b)S2C7
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 68 S2C14 Increase in thickness by plastering — walls
[2019: Sch. 5 (Annex ): 6.1]
If a wall of ashlar, solid gypsum blocks or concrete is plastered on both sides to an equal thickness, the thickness of the
wall for the purposes of Tables S1C2b and S1C2c (but not for the purposes of S2C5 ) may be increased by the thickness
of the plaster on one side.
S2C15 Increase in thickness by plastering — columns
[2019: Sch. 5 (Annex ): 6.2]
(1) Where Tables S1C2e , S1C2f , S1C2g , S1C2h , S1C2i and S1C2j indicate that column-protection is to be plastered,
the tabulated thicknesses are those of the principal material.
(2) The thicknesses referred to in (1) do not include the thickness of plaster, which must be additional to the listed
thickness of the material to which it is applied.
S2C16 Gypsum-perlit e or gypsum -vermiculite plaster or metal lath — walls
[2019: Sch. 5 (Annex ): 7.1]
In walls fabricated of gypsum-perlite or gypsum-vermiculite plaster on metal lath and channel—
the lath must be securely wired to each side of 19 mm x 0.44 kg/m steel channels (used as studs) spaced at not (a)
more than 400 mm centres; and
the gypsum-perlite or gypsum-vermiculite plaster must be applied symmetrically to each exposed side of the (b)
lath.
S2C17 Gypsum-perlit e or gypsum -vermiculite plaster or metal lath — columns
[2019: Sch. 5 (Annex ): 7.2]
(1) For the fire protection of steel columns with gypsum-perlite or gypsum-vermiculite on metal lath—
the lath must be fixed at not more than 600 mm centres vertically to steel furring channels, and— (a)
if the plaster is to be 35 mm thick or more — at least 12 mm clear of the column; or (i)
if the plaster is to be less than 35 mm thick — at least 6 mm clear of the column; or (ii)
the plaster may be applied to self-furring lath with furring dimples to hold it not less than 10 mm clear of the (b)
column.
(2) For the purposes of (1), the thickness of the plaster must be measured from the back of the lath.
S2C18 Gypsum-perlit e or gypsum -vermiculite plaster or metal lath — beams
[2019: Sch. 5 (Annex ): 7.3]
For the fire protection of steel beams with gypsum-perlite or gypsum-vermiculite on metal lath—
the lath must be fixed at not more than 600 mm centres to steel furring channels and at least 20 mm clear of the (a)
steel; and
the thickness of the plaster must be measured from the back of the lath. (b)
S2C19 Exposure of columns
[2019: Sch. 5 (Annex ): 8.1]
A column incorporated in or in contact on one or more sides with a wall of solid masonry or concrete at least 100 mm thick
may be considered to be exposed to fire on no more than 3 sides. S2C14
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 69 S2C20 Exposure of beams
[2019: Sch. 5 (Annex ): 8.2]
A beam, open-web joist, girder or truss in direct and continuous contact with a concrete slab or a hollow block floor or roof
may be considered to be exposed to fire on no more than 3 sides.
S2C21 Filling of column spaces
[2019: Sch. 5 (Annex ): 9]
(1) The spaces between the fire-protective material and the steel (and any re-entrant parts of the column itself) must be
filled solid with a fire-protective material like concrete, gypsum or grout.
(2) The insides of hollow sections, including pipes, need not be filled.
S2C22 Hollow terracotta blocks
[2019: Sch. 5 (Annex ): 10 ]
The proportion of cored holes or perforations in a hollow terracotta block (based on the overall rectangular volume of the
unit) must not exceed the following:
For blocks up to 75 mm thick — 35%. (a)
For blocks more than 75 mm but not more than 100 mm thick — 40%. (b)
For blocks more than 100 mm — 50%. (c)
S2C23 Reinforcing for column and beam protection — masonry
[2019: Sch. 5 (Annex ): 11.1]
Masonry of calcium-silicate, fired clay and concrete for the protection of steel columns must have steel-wire or mesh
reinforcement in every second course and lapped at the corners.
S2C24 Reinforcing for column and beam protection — gypsum blocks and hollow
terracotta blocks
[2019: Sch. 5 (Annex ): 11.2]
Gypsum blocks and hollow terracotta blocks for the protection of steel columns must have steel-wire or mesh reinforcement
in every course and lapped at corners.
S2C25 Reinforcing for column and beam protection — structural concrete and
poured gypsum
[2019: Sch. 5 (Annex ): 11.3]
If a steel column or a steel beam is to be protected with structural concrete or poured gypsum, the concrete or gypsum
must be reinforced with steel-wire mesh or steel-wire binding placed about 20 mm from its outer surface, and—
for concrete or gypsum less than 50 mm thick, the steel wire must be— (a)
at least 3.15 mm in diameter; and (i)
spaced at not more than 100 mm vertically; or (ii)
for concrete or gypsum not less than 50 mm thick, the steel wire must be either— (b)
of a diameter and spacing in accordance with (a); or (i)
at least 5 mm in diameter and spaced at not more than 150 mm vertically. (ii)S2C20
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 70 S2C26 Reinforcing for column and beam protection — gypsum -perlit e or gypsum -
vermiculite plaster sprayed to contour
[2019: Sch. 5 (Annex ): 11.4]
(1) If a steel column or steel beam is protected with either gypsum-perlite or gypsum-vermiculite plaster sprayed to
contour and the construction falls within the limits of Table S2C26a or S2C26b , the plaster must be reinforced with—
expanded metal lath complying with S2C7 ; or (a)
galvanised steel wire mesh complying with S2C7 . (b)
(2) The reinforcement must be placed at a distance from the face of the plaster of at least 1/3 of the thickness of the
plaster and must be securely fixed to the column or beam at intervals of not more than the relevant listing in Tables
S2C26a and S2C26b .
(3) For the purposes of Tables S2C26a and S2C26b —
“vertical” includes a surface at not more than 10º to the vertical; and (a)
“horizontal” includes a surface at not more than 10º to the horizontal; and (b)
“underside” means the underside of any horizontal or non-vertical surface. (c)
Table S2C26a: Reinforcement of gypsum -perlit e or gypsum -vermiculite plaster sprayed to contour —
vertical members with H or I cross -section
Table S2C26b: Reinforcement of gypsum -perlit e or gypsum -vermiculite plaster sprayed to contour —
vertical members with other shapes
S2C27 Measurement of thickness of column and beam protection
[2019: Sch. 5 (Annex ): 12.1]
The thickness of the fire protection to steel columns and steel beams (other than fire protection of gypsum-perlite or
gypsum-vermiculite plaster sprayed on metal lath or sprayed to contour) is to be measured from the face or edge of the
steel, from the face of a splice plate or from the outer part of a rivet or bolt, whichever is the closest to the outside of th e
fire-protective construction, except that—
if the thickness of the fire protection is 40 mm or more, rivet heads may be disregarded; and (a)
if the thickness of the fire protection is 50 mm or more— (b)
any part of a bolt (other than a high-tensile bolt) may be disregarded; and (i)
a column splice plate within 900 mm of the floor may encroach upon the fire protection by up to a ¼ of the (ii)
thickness of the fire protection; and
the flange of a column or beam may encroach by up to 12 mm upon the thickness of the fire protection at right (c)Surface to be protected Reinforcement required if smaller
dimension of surface exceeds (mm)Max spacing of fixings of the mesh to
surface (mm)
Vertical 450 450
Non-vertical 300 300
Underside 300 300
Upper side of a horizontal surface Not required N/A
Surface to be protected Reinforcement required if smaller
dimensions of surface exceeds (mm)Max spacing of fixings of the mesh to
surface (mm)
Vertical Any size 450
Non-vertical Any size 300
Undersize Any size 300
Upper side of a horizontal surface Not required N/AS2C26
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 71angles to the web if—
the column or beam is intended to have an FRL of 240/240/240 or 240/–/–; and (
i)
the flange projects 65 mm or more from the web; and (
ii)
the thickness of the edge of the flange (inclusive of any splice plate) is not more than 40 mm. (iii)S2C27
(1 May 2023)
Governing requirements
NCC 2022 Volume Three - Plumbing Code of Australia Page 72
S3C1 Scope
[2019: Sch. 6: 1]
This Specification sets out the procedures for determining the fire hazard properties of assemblies tested to AS/NZS
1530.3.
S3C2 General requirement
[2019: Sch. 6: 2.1]
The fire hazard properties of assemblies and their ability to screen their core materials as required under Specification 7
must be determined by testing in accordance with S3C3 to S3C6 .
S3C3 Form of test
[2019: Sch. 6: 2.2]
Tests must be carried out in accordance with—
for the determination of the Spread-of-Flame Index and Smoke-Developed Index — AS/NZS 1530.3; and (a)
for the determination of the ability to prevent ignition and to screen its core material from free air — AS 1530.4. (b)
S3C4 Test specimens
[2019: Sch. 6: 2.3]
Test specimens must incorporate—
all types of joints; and (a)
all types of perforations, recesses or the like for pipes, light switches or other fittings, which are proposed to be (b)
used for the member or assembly of members in the building.
S3C5 Concession
[2019: Sch. 6: 2.4]
S3C4 does not apply to joints, perforations, recesses or the like that are larger than those in the proposed application and
have already been tested in the particular form of construction concerned and found to comply with the conditions of the
test.
S3C6 Smaller specimen permitted
[2019: Sch. 6: 2.5]
A testing laboratory may carry out the test specified in S3C3(b) at pilot scale if a specimen (which must be not less than
900 mm x 900 mm) will adequately represent the proposed construction in the building, but the results of that test do not
apply to construction larger than limits defined by the laboratory conducting the pilot examination.Specification 3 Fire hazard properties
Assemblies
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 73
Section B Water services
Part B1 Cold water services
Objectives
B1O1 Objective
Functional Statements
B1F1 Cold water supply
B1F2 Cold water service
B1F3 Fire sprinkler systems
Performance Requirements
B1P1 Cold water supply
B1P2 Velocity
B1P3 Access and isolation
B1P4 Water efficiency
B1P5 Pressure
B1P6 Uncontrolled discharge
Deemed-to-Satisfy Provisions
B1D1 Deemed -to -Satisfy Provisions
B1D2 Water efficiency
B1D3 General requirements
B1D4 Bushfire prone areas
B1D5 Cold water fire sprinkler systems
B1D6 Top -up lines
Part B2 Heated water services
Objectives
B2O1 Objective
Functional Statements
B2F1 Heated water supply
B2F2 Heated water installations
B2F3 Greenhouse gas emissions
Performance Requirements
B2P1 Heated water supply
B2P2 Scald prevention
B2P3 Velocity
B2P4 Access and isolation
B2P5 Pressure relief and temperature limitation
B2P6 Legionella control
B2P7 Energy use and source
B2P8 Temperature
B2P9 Pressure
B2P10 Uncontrolled discharge
B2P11 Water efficiency
Verification Methods
B2V1 Heated water storage temperature
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 74Deemed-to-Satisfy Provisions
B2D1 Deemed -to -Satisfy Provisions
B2D2 Water heater in a heated water supply system
B2D3 Layout of taps
B2D4 Water efficiency
B2D5 Maximum delivery temperature
B2D6 Temperature control devices
B2D7 Heated water storage
B2D8 Legionella control
B2D9 General requirements
B2D10 Bushfire prone areas
B2D11 Solar heated water
Part B3 Non-drinking water services
Objectives
B3O1 Objective
Functional Statements
B3F1 Non-drinking water supply
B3F2 Non-drinking water installations
Performance Requirements
B3P1 Non-drinking water supply
B3P2 Identification
B3P3 Velocity
B3P4 Access and isolation
B3P5 Pressure
B3P6 Uncontrolled discharge
B3P7 Water efficiency
Deemed-to-Satisfy Provisions
B3D1 Deemed -to -Satisfy Provisions
B3D2 Distribution of non -drinking water
B3D3 General requirements
B3D4 Bushfire prone areas
B3D5 Water efficiency
Part B4 Fire-fighting water services
Objectives
B4O1 Objective
Functional Statements
B4F1 Fire-fighting water supply
Performance Requirements
B4P1 Flow rate and pressure
B4P2 Access and isolation
B4P3 Fire-fighting water storage
B4P4 Uncontrolled discharge
Deemed-to-Satisfy Provisions
B4D1 Deemed -to -Satisfy Provisions
B4D2 General requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 75B4D3 Fire sprinkler systems
B4D4 Fire hydrants
B4D5 Fire hose reels
B4D6 Bushfire prone areas
Part B5 Cross-connection control
Objectives
B5O1 Objective
Functional Statements
B5F1 Design and installation
Performance Requirements
B5P1 Contamination control
Verification Methods
B5V1 Determination of individual and zone hazard ratings
Deemed-to-Satisfy Provisions
B5D1 Deemed -to -Satisfy Provisions
B5D2 Drinking water service
B5D3 Non-drinking water service
B5D4 Fire-fighting water service
B5D5 Unprotected water service
B5D6 Rainwater
Part B6 Rainwater services
Objectives
B6O1 Objective
Functional Statements
B6F1 Rainwater service
Performance Requirements
B6P1 Pressure
B6P2 Velocity
B6P3 Water efficiency
B6P4 Access and isolation
B6P5 Identification
B6P6 Uncontrolled discharge
Deemed-to-Satisfy Provisions
B6D1 Deemed -to -Satisfy Provisions
B6D2 General requirements
B6D3 Identification
B6D4 Water efficiency
B6D5 Access and isolation
B6D6 Bushfire prone areas
Part B7 Rainwater storage
Objectives
B7O1 Objective
Functional Statements
B7F1 Rainwater storage
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 76B7P1 Contamination control
B7P2 Uncontrolled discharge
B7P3 Access and isolation
B7P4 Identification
Deemed-to-Satisfy Provisions
B7D1 Deemed -to -Satisfy Provisions
B7D2 Collection of rainwater
B7D3 Identification
Specification 41 Cross-connection hazards
S41C1 Scope
S41C2 Application
S41C3 Protection types and hazard ratings
S41C4 Individual protection
S41C5 Zone protection
S41C6 Containment protection
S41C7 Fire-fighting water services
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 77
Introduction to this Part
This Part sets out the requirements for any part of a cold water service of a property that is connected to a drinking water
supply. It covers from the point of connection to the points of discharge.
This part also applies to a cold water service connected to an alternative water source and residential fire sprinklers
installed in accordance with FPAA101D Automatic Fire Sprinkler System Design and Installation - Drinking Water Supply.
B1O1 Objective
[2019: BO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a cold water (a)
installation; and
ensure that a cold water installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a cold water installation is designed and is capable of being maintained so that throughout its (f)
serviceable life it will continue to satisfy Objectives (a) to (e).
B1F1 Cold water supply
[2019: BF1.1]
Sanitary fixtures, sanitary appliances and supply outlets providing drinking water must have a safe and adequate piped
cold water supply.
B1F2 Cold water service
[2019: BF1.2]
The cold water service must be conveyed through plumbing installations in a way that minimises any adverse impact
on building occupants, the Network Utility Operator’s infrastructure, property and the environment.
B1F3 Fire sprinkler systems
[New for 2022]
Residential fire sprinkler equipment must be provided with adequate water supply and pressure for its intended purpose.
Part B1 Cold water services
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 78 B1P1 Cold water supply
[2019: BP1.1]
A cold water service must be connected to a drinking water supply.
Applications
B1P1 applies to cold water supplied for human consumption, food preparation, food utensil washing or personal (1)
hygiene.
B1P1 applies to automatic fire sprinkler systems when installed in accordance with FPAA101D Automatic Fire (2)
Sprinkler System Design and Installation - Drinking Water Supply.
Explanatory Information: Unintentional heating of cold water services
Where installed in a location subjected to extreme summer temperatures (such as the roof space of a building), •
cold water services have the potential to become unintentionally heated. This can pose a hazard as the cold water
supply may reach temperatures in excess of 45° Celsius, increasing the potential for scalding.
To reduce the likelihood of unintentional heating of cold water services, consideration should be given to— •
avoiding long runs of pipework in locations exposed to solar heat gain; or (i)
applying insulation, either directly to the pipework, or by using additional ceiling insulation material between (ii)
the pipework and the solar heat source.
Avoidance of unintentional heating of cold water services in known areas of extreme summer temperatures may •
also assist in reducing water usage through drawing off of water which has become excessively heated.
B1P2 Velocity
[2019: BP1.2]
Cold water service pipework must ensure that the pipework water velocity does not exceed 3 metres per second for more
than 1% of the time that water is required during the annual peak hour.
Explanatory Information
During the hour of heaviest usage expected to occur in a year, cold water service velocity of 3 metres per second must
not be exceeded for 99% of the time downstream fixtures are in use.
B1P3 Access and isolation
[2019: BP1.2]
(1) A cold water service must ensure access for maintenance of mechanical components and operational controls.
(2) A cold water service must ensure the system, appliances and devices can be isolated for testing and maintenance.
B1P4 Water efficiency
[2019: BP1.2]
A cold water service must ensure the efficient use of drinking water by—
limiting water usage from— (a)
a tap or outlet for a shower, basin, kitchen sink or laundry trough, to a flow rate of not more than 9 l/m; and (i)
a cistern or flushing device for a urinal, to a flush volume of not more than 2.5 litres for each— (ii)
single urinal stall; or (A)
600 mm length of a continuous urinal wall; and (B)B1P1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 79a dual flush cistern or flushing valve that is connected to a water closet pan to a flush volume of not more (iii)
than—
6 and 3 litres; or (A)
4.5 and 3 litres; or (B)
water saving measures equivalent to or greater than those described in (a). (b)
Applications
The flush volumes of B1P4 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of B1P4 do not apply to a vacuum drainage system.
TAS B1P5
B1P5 Pressure
[2019: BP1.2]
The points of discharge for a cold water service must—
have— (a)
a working pressure of not less than 50 kPa; and (i)
a static pressure within the building of not more than 500 kPa; or (ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside (b)
of (a)(i) and (a)(ii) are required.
B1P6 Uncontrolled discharge
[2019: BP1.2]
A cold water service must avoid failure or uncontrolled discharge .
B1D1 Deemed -to-Satisfy Pr ovisions
[2019: B1.1]
(1) Performance Requirement B1P1 is satisfied if the cold water service is connected to—
the Network Utility Operator’s drinking water supply; or (a)
an alternative drinking water supply. (b)
(2) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B1P2 to B1P6 are satisfied by
complying with B1D2 to B1D6 .
(3) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable. Deemed -to-Satisfy ProvisionsB1P4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 80 B1D2 Water efficiency
[2019: B1.2]
(1) A tap or outlet used for a shower, basin, kitchen sink or laundry trough must be a minimum of 3 Star WELS rated and
discharge not more than 9 litres per minute.
QLD B1D2(2)
(2) Cisterns or flushing devices for water closets must—
have a dual flushing mechanism; and (a)
be a minimum 3 Star WELS rating discharging not more than 6 litres or 4.5 litres for a full flush. (b)
(3) Cisterns or flushing devices for urinals must—
be a minimum 2 Star WELS rating discharging a volume of not more than 2.5 litres for each— (a)
single urinal stall; or (i)
600 mm length of continuous urinal wall; and (ii)
not be set-cycled or activated by any method other than manual or use activation. (b)
Applications
B1D2(1) applies to outlets that provide cold water only. The Deemed-to-Satisfy Provision for outlets that deliver a (1)
combination of cold water and heated water is B2D4 .
The flush volumes of B1D2(2) and B1D2(3) may be within a tolerance of— (2)
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of B1D2(1) do not apply to a shower intended to provide rapid drenching of a person for (1)
emergency purposes, such as chemical removal.
The requirements of B1D2(2) and B1D2(3) do not apply to a vacuum drainage system. (2)
The requirements of B1D2(3)(b) do not apply to a programmed solenoid operated flushing system if programmed (3)
to shut down during extended periods of non-occupancy of a building.
Explanatory Information
Prior to installing a programmed solenoid operated flushing system, further advice should be sought from the authority
having jurisdiction.
Where sensor control is used for urinal flushing, sensors should be located to avoid unnecessary ‘nuisance’ flushing
triggered by pedestrian traffic.
AS/NZS 6400 Water Efficient Products - Rating and labelling, provides the basis for the rating and labelling of a range
of products under the mandatory Water Efficiency Labelling and Standards (WELS) Scheme.
B1D2 outlines the minimum level of water efficiency for certain plumbing products and fixtures, however the adoption
of products and technologies of greater efficiency should be considered.
NSW B1D3
TAS B1D3
VIC B1D3 B1D2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 81 B1D3 General requirements
[2019: B1.4]
A cold water service must be in accordance with AS/NZS 3500.1.
B1D4 Bushfire prone areas
[New for 2022]
A cold water service in a designated bushfire prone area must be in accordance with AS 3959.
B1D5 Cold water fire sprinkler systems
[2019:B4.2]
A cold water service used for fire-fighting must be in accordance with—
the requirements of E1 of Volume One, where applicable; and (a)
FPAA 101D when installed in a Class 2 or Class 3 building with an effective height of not more than 25 m and a (b)
rise in storeys of 4; and
AS/NZS 3500.1. (c)
Exemptions
B1D5(b) does not apply to a residential care building .
Explanatory Information
For all other fire-fighting water services, see Part B4 .
B1D6 Top -up lines
[2019: B6.3]
A cold water service used to top up a rainwater tank must be in accordance with AS/NZS 3500.1.
TAS B1D7
Explanatory Information: Cross -v olume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to cold water
services. These include, but may not be limited to, those listed in Table B1.
Table B1: Cross -v olume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Excavations for pipework adjacent
to a building and footingsB1 Structural provisions H1 Structure
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 StructureB1D3
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 82 Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safety
Fixtures and fittings in a wet area F2 Wet areas and overflow
protectionH4 Health and amenity
Service pipework external to the
building and penetrations through
roof cladding in a bushfire prone
areaG5 Construction in bushfire prone
areasH7 Ancillary provisions and
additional construction requirements
Pipework sound insulation F7 Sound transmission and
insulationH4 Health and amenity
Flues, chimneys, pipes, gas storage,
domestic fuel tanks, cooling or
heating appliances or other servicesC4 Protection of openings H3 Fire safety
Power supply to boiling and/or
chilled water storage unitsJ7 Artificial lighting and power Not applicableB1D6
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 83
Introduction to this Part
This Part sets out the requirements for any part of a heated water service of a property that is connected to the drinking
water supply. It covers from the point of connection to the points of discharge.
B2O1 Objective
[2019: BO2]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a heated water (a)
installation; and
ensure that a heated water installation is suitable; and (b)
conserve water; and (c)
safeguard the environment; and (d)
reduce greenhouse gas emissions; and (e)
safeguard public and private infrastructure; and (f)
ensure that a heated water installation is designed and is capable of being maintained so that throughout its (g)
serviceable life it will continue to satisfy Objectives (a) to (f).
B2F1 Heated water supply
[2019: BF2.1]
Sanitary fixtures, sanitary appliances and supply outlets provided with heated water must have a safe and adequate
piped heated water supply.
B2F2 Heated water installations
[2019: BF2.2]
The heated water supply must be conveyed through plumbing installations in a way that—
minimises any adverse impact on building occupants, the Network Utility Operator’s infrastructure, property (a)
and the environment; and
facilitates the conservation of water. (b)
B2F3 Greenhouse gas emissions
[2019: BF2.3]
To reduce greenhouse gas emissions, to the degree necessary, a heated water service is to—
be capable of efficiently using energy; and (a)
obtain its heating energy from— (b)Part B2 Heated water services
Objectives
Functional Statements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 84a low greenhouse gas intensity energy source; or (i)
an on-site renewable energy source; or (ii)
another process as reclaimed energy. (iii)
Explanatory Information
The greenhouse gas intensity of energy sources vary. For example, natural gas has a low greenhouse gas intensity
compared with electricity generated from coal.
For the purposes of B2F3(b), the renewable energy source must be on-site (not GreenPower) and includes, but is not
limited to solar, wind, hydroelectric, wave action and geothermal.
B2P1 Heated water supply
[2019: BP2.1]
A heated water service must be connected to a drinking water supply.
Applications
B2P1 applies to a heated water service used for human consumption, food preparation, food utensil washing or personal
hygiene.
B2P2 Scald prevention
[2019: BP2.2]
Heated water supplied by a heated water service must be delivered from the point of discharge of fixtures and appliances
at a temperature which is unlikely to scald.
Applications
B2P2 applies to fixtures and appliances used primarily for personal hygiene.
B2P3 Velocity
[2019: BP2.3]
VIC B2P3(1)
The water velocity in heated water service pipework up to 65 °C must not exceed—
3.0 m/s for more than 1% of the time that water is required during the peak hour in reticulated heated water (a)
systems; and
1.2 m/s for the flow and 1.0 m/s for the return of a copper circulatory heated water service for more than 1% of (b)
the time that water is required during the peak hour; and
1.0 m/s for the flow and return of a circulatory heated water service using other materials for more than 1% of (c)
the time that the water is required during the peak hour.
Explanatory Information
High velocities in heated water services can be a contributing factor to the erosion/corrosion of pipework. Consideration
should be given to the appropriate velocities for the building based on water temperature, water chemistry and materials
used.
Performance RequirementsB2F3
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 85 B2P4 Access and isolation
[2019: BP2.3]
VIC B2P4(1)
(1) Access must be available to heated water service pipework for maintenance of mechanical components and
operational controls.
(2) Heated water service pipework, appliances and devices must be capable of being isolated for testing and
maintenance.
B2P5 Pressure relief and temperature limitation
[2019: BP2.4]
Containers used for producing and/or storing heated water are to relieve excessive pressure and avoid flash steam
production by—
relieving pressure so that the maximum rated working pressure, or 1400 kPa, whichever is the lesser, is not (a)
exceeded; and
limiting water temperatures to a maximum of 99 °C; or (b)
other suitable means providing an equivalent level of safety to (a) and (b). (c)
Applications
B2P5(a) has a tolerance of +5% or 14 kPa whichever is the greater.
B2P6 Legionella control
[2019: BP2.5]
Heated water must be stored and delivered under conditions which avoid the likelihood of the growth of a Legionella
bacteria count greater than or equal to 10 Legionella colony forming units (cfu) per millilitre.
Explanatory Information
A risk assessment should be undertaken for the control and management of Legionella in heated water systems in
aged care , health-care and other similar facilities with high risk occupants.
QLD B2P7
B2P7 Energy use and source
[2019: BP2.6]
(1) A heated water service, including any associated distribution system and components, must ensure the efficient use
of energy and water.
(2) Features in B2P7(1) must be appropriate to the following:
The heated water service and its usage. (a)
The geographic location of the building. (b)
The location of the heated water service. (c)
The energy or water source. (d)
VIC B2P7(3)
Explanatory Information
Excessive ‘dead water’ draw-off, i.e. where cooled water from the supply pipe is drained off prior to delivery of heated
water , can result in water and energy wastage. B2P4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 86To improve the efficiency of heated water systems, the design should consider factors such as the number of outlets,
their purpose and expected typical usage, and the distance between the water heater and each of the outlets. The
water heater should be positioned nearest to the most used outlets, or installed to provide consistent coverage of the
building. Where this is not viable, the use of multiple water heaters or a flow and return pipe loop may need to be
considered.
B2P7(2) permits the energy source of the heated water service to be considered. This means that the net energy
obtained from renewable energy sources such as solar, geothermal, wind, and biofuels may be considered as ‘free’
energy in calculating the energy consumption. Similarly, heat reclaimed from another ‘free’ source such as a by-product
from co-generation type processes as well as other industrial processes, which could otherwise be rejected from the
building, could be considered as ‘free’ energy in calculating the energy consumption.
B2P8 Temperature
[2019: BP2.3]
A heated water service must ensure that heated water is provided at appropriate temperatures for the correct functioning
of the fixture or appliance.
TAS B2P9
B2P9 Pressure
[2019: BP2.3]
The points of discharge for a heated water service must—
have— (a)
a working pressure of not less than 50 kPa; and (i)
a static pressure within the building of not more than 500 kPa; or (ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures are (b)
outside of (a)(i) and (a)(ii) are required.
B2P10 Uncontrolled discharge
[2019: BP2.3]
A heated water service must avoid failure or uncontrolled discharge .
B2P11 Water efficiency
[New for 2022]
A heated water service must ensure the efficient use of drinking water by limiting water use from a tap or outlet for a
shower, basin, kitchen sink or laundry trough to a flow rate of not more than 9 l/m.
B2V1 Heated water storage temperature
[2019: BV2.2]
Compliance with B2P6 is verified for each heated water storage system when the water heater is designed such that all
water is subjected to a temperature-dependent minimum exposure period as specified in Table B2V1 within 7 days before
passing through the water-heating appliance’s heated water outlet. Verification MethodsB2P7
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 87 Table B2V1: Heated water storage minimum exposure period
B2D1 Deemed -to-Satisfy Pr ovisions
[2019: B2.1]
(1) Performance Requirement B2P1 is satisfied if heated water is supplied by—
the Network Utility Operator’s drinking water supply; or (a)
an alternative drinking water supply. (b)
(2) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B2P2 to B2P11 are satisfied by
complying with B2D2 to B2D11 .
(3) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
(4) Where it is proposed to use a warm water system, Performance Requirement B2P6 must be complied with.
Notes
There are no Deemed-to-Satisfy Provisions for warm water systems.
NSW B2D2
QLD B2D2
SA B2D2 TAS B2D2
B2D2 Water heater in a heated water supply system
[2019: B2.2]
(1) In a new Class 1 or Class 10 building, a water heater in a heated water supply system must be—
a solar water heater complying with (2); or (a)
a heat pump water heater complying with (2); or (b)
a gas water heater complying with (3); or (c)
an electric resistance water heater only in the circumstances described in (4); or (d)
a wood fired thermosiphon water heater or direct fired water heater each complying with AS/NZS 3500.4. (e)
(2) In a new Class 1 or Class 10 building a solar water heater and a heat pump water heater must comply with either—
Table B2D2a , for the minimum Small-scale Technology Certificates for the installation zone; or (a)
Table B2D2b , for the minimum energy savings calculated in accordance with AS/NZS 4234. (b)
(3) In a new Class 1 or Class 10 building, a gas water heater must be rated not less than 5 Stars in accordance with AS
4552.
(4) In a new Class 1 or Class 10 building, an electric resistance water heater with no storage or a heated water delivery
of not more than 50 litres in accordance with AS 1056.1 may be installed when—
the building has— (a)Temperature Minimum exposure period
70 °C or greater 1 second
66 °C 2 minutes
60 °C 32 minutes
Deemed -to-Satisfy ProvisionsB2V1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 88not more than 1 bedroom; and (i)
not more than 1 electric resistance water heater installed; or (ii)
the building has— (b)
a water heater that complies with (2) or (3); and (i)
not more than 1 electric resistance water heater installed; or (ii)
the greenhouse gas emission intensity of the public electricity supply is low. (c)
VIC B2D2(5)
Table B2D2a: Minimum Small Scale Technology Certificates
Table B2D2b: Minimum energy savings
B2D3 Layout of taps
[2019: B2.3]
Where both a heated water tap and a cold water tap are installed, the heated water tap must be installed to the left of, or
above, the cold water tap if—
each tap controls a separate outlet; or (a)
both taps control a combined flow of water delivered through a single outlet. (b)
Explanatory Information
To reduce the likelihood of scalding in a bath, consideration should be given to installing taps out of reach of the bath
occupants. This would reduce the likelihood of children accidentally turning the heated water on or adjusting the water
temperature.
To reduce the likelihood of scalding, consideration should be given to the following when installing heated water taps
in a shower:
Heated water taps such as a quarter turn tap should be located in a manner, that to be turned on, requires the tap •
lever to be turned upwards, reducing the likelihood of accidentally turning the heated water on in the event of a slip
or fall. Likewise, cold water taps should be located in a manner, so that the lever operator is turned down to turn on
the cold water.
Mixing taps, where the lever is lifted to start the flow of water, should be considered because if a slip or fall occurred, •
there is greater likelihood that the temperature would either be reduced or the tap turned off.
The location of shower taps should be positioned at a height so that they cannot be operated by young children. •
Positioning the taps in a specific recess may reduce the likelihood of accidentally altering the water temperature in •
the event of a slip or fall and is considered a suitable recommendation for bathrooms provided for the elderly or
infirm.
Number of bedrooms
in the building2022 2023 2024 2025
1 or 2 12 11 9 8
3 or 4 19 17 15 13
4 or more 25 22 19 16
Number of bedrooms Minimum energy saving
1 or 2 40% for a ‘small load’ system
2 or 3 60% for a ‘medium load’ system
4 or more 60% for a ‘large load’ systemB2D2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 89 B2D4 Water efficiency
[2019: B2.4]
A tap or outlet used for a shower, basin, kitchen sink, or laundry trough must be a minimum of 3 Star WELS rated and
discharge not more than 9 litres per minute.
Exemptions
The requirements of B2D4 do not apply to a shower intended to provide rapid drenching of a person for emergency
purposes, such as chemical removal.
Applications
A heated water outlet includes an outlet which delivers any combination of heated water and cold water.
Explanatory Information
AS/NZS 6400 Water Efficient Products - Rating and labelling, provides the basis for the rating and labelling of a range
of products under the mandatory Water Efficiency Labelling and Standards (WELS) Scheme.
B2D4 outlines the minimum level of water efficiency for certain plumbing products and fixtures, however the adoption
of products and technologies of greater efficiency should be considered.
NSW B2D5
SA B2D5
VIC B2D5
B2D5 Maximum delivery temperature
[2019: B2.5]
The delivery temperature of heated water at the outlet of each sanitary fixture must be—
not more than 45 °C in any— (a)
residential part of an aged care building ; or (i)
patient care area in a health-care building ; or (ii)
part of an early childhood centre , or primary or secondary school , that is used by children; or (iii)
designated accessible facility in a common area of a Class 2 building, or in any part of a Class 3 , Class 5 , (iv)
Class 6 , Class 7 , Class 8 , Class 9a, Class 9b, Class 9c or Class 10 building; or
not more than 50 °C in all other cases. (b)
Applications
B2D5 applies to all heated water installations intended for personal hygiene.
Explanatory Information
Scenarios covered in B2D5 may include where—
a heated water service is installed on the premises for the first time; or •
the water heater forming part of an existing heated water service is— •
replaced with a like-for-like water heater; or ◾
replaced with a different type of water heater; or ◾
relocated, and is reconnected to, some or all of the sanitary fixtures to which it was previously connected; or ◾
more than one existing sanitary fixture is replaced with new similar fixtures; or •
an existing heated water service on the premises is altered or extended to serve additional sanitary fixtures. •B2D4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 90Consideration should be given to the intended occupants of a building when commissioning the heated water delivery
temperature. For example, if the occupants of a Class 1 building are older adults or young children, a lower temperature
than specified in B2D5(b) should be considered.
NSW B2D6
TAS B2D6
VIC B2D6
B2D6 Temperature control devices
[2019: B2.6]
(1) A temperature control device used to deliver heated water in accordance with B2D5(a) must be a—
thermostatic mixing valve; or (a)
thermostatically controlled tap. (b)
(2) A temperature control device used to deliver heated water in accordance with B2D5(b) must be a—
thermostatic mixing valve; or (a)
thermostatically controlled tap; or (b)
tempering valve; or (c)
temperature limited water heater. (d)
(3) The required maximum delivery temperature must be achieved in accordance with AS/NZS 3500.4.
Applications
B2D6 applies to all heated water installations intended for personal hygiene.
Explanatory Information
Scenarios covered by B2D6 may include where—
a heated water service is installed on the premises for the first time; or •
the water heater forming part of an existing heated water service is— •
replaced with a like-for-like water heater; or ◾
replaced with a different type of water heater; or ◾
relocated, and is reconnected to, some or all of the sanitary fixtures to which it was previously connected; or ◾
more than one existing sanitary fixture is replaced with new similar fixtures; or •
an existing heated water service on the premises is altered or extended to serve additional sanitary fixtures. •
B2D7 Heated water storage
[2019: B2.7]
Containers used for producing and/or storing heated water must be provided with a temperature and pressure relief device
in accordance with AS/NZS 3500.4.
B2D8 Legionella control
[2019: B2.8]
Legionella control for water heaters must be carried out in accordance with AS/NZS 3500.4.
B2D5
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 91SA B2D9
B2D9 General requirements
[2019: B2.9]
A heated water service must be in accordance with AS/NZS 3500.4.
B2D10 Bushfire prone areas
[New for 2022]
A heated water service in a designated bushfire prone area must be in accordance with AS 3959.
B2D11 Solar heated water
[2019: B2.9]
A solar heated water supply system for food preparation and sanitary purposes, where installed in a new building in climate
zones 1, 2 or 3, is not required to comply with
Section 8
of AS/NZS 3500.4.Explanatory Information: Cross -v olume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to a heated water
service. They include, but may not be limited to, those listed in Table B2.
Table B2: Cross -v olume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Excavations for pipework adjacent
to a building and footingsB1 Structural provisions H1 Structure
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 Structure
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safety
Fixtures and fittings in a wet area F2 Wet areas and overflow
protectionH4 Health and amenity
Service pipework external to the
building and penetrations through
roof cladding in a bushfire prone
areaG5 Construction in bushfire prone
areasH7 Ancillary provisions and
additional construction requirements
Pipework sound insulation F7 Sound transmission and
insulationH4 Health and amenity
Flues, chimneys, pipes, gas storage,
domestic fuel tanks, cooling or
heating appliances or other servicesC4 Protection of openings H3 Fire safetyB2D8
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 92 Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Central heating pipework J6 Air-conditioning and ventilation
systemsH6 Energy efficiency
Pool and spa heating and pumping -
energy efficiencyJ8 Heated water supply and
swimming pool and spa pool plantH6 Energy efficiency
Energy consumption monitoring for
water heatersJ9 Facilities for energy monitoring Not applicableB2D11
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 93
Introduction to this Part
This Part sets out the requirements for any part of a non-drinking water service of a property. It covers from the point of
connection to the points of discharge.
Rainwater is not classified as a non-drinking water service.
B3O1 Objective
[2019: BO3]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a non-drinking water (a)
installation; and
ensure that a non-drinking water installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a non-drinking water installation throughout its serviceable life will continue to satisfy the (f)
requirements of Objectives (a) to (e).
B3F1 Non -drinking wat er supply
[2019: BF3.1]
Sanitary fixtures, sanitary appliances and supply outlets provided with non-drinking water must be adequate.
B3F2 Non -drinking wat er installations
[2019: BF3.2]
Non-drinking water must be supplied through plumbing installations in a way that avoids the likelihood of inadvertent
contamination of any drinking water service, minimise any adverse impact on building occupants, the Network Utility
Operator’s infrastructure, property and the environment.
B3P1 Non -drinking wat er supply
[2019: BP3.1]
A non-drinking water service must not have a cross-connection with a drinking water service. Part B3 Non -drinking water services
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 94 B3P2 Identification
[2019: BP3.2]
(1) Pipes, pipe outlets, fittings, storage and holding tanks that are part of a non-drinking water service must be clearly
identified.
(2) A non-drinking water service must only be connected to outlets clearly identified for non-drinking use.
B3P3 Velocity
[2019: BP3.3]
VIC B3P3(1)
Non-drinking water service pipework must ensure that pipework water velocity does not exceed 3 m/s for more than 1%
of the time that the water is required during the annual peak hour.
Explanatory Information
During the hour of heaviest usage in reticulated non-drinking services, a water velocity of 3 m/s must not be exceeded
for 99% of the time that any downstream fixtures are in use.
B3P4 Access and isolation
[2019: BP3.3]
(1) A non-drinking water service must ensure access for maintenance of mechanical components and operational
controls.
(2) A non-drinking water service must ensure the system, appliances and devices can be isolated for testing and
maintenance.
B3P5 Pressure
[2019: BP3.3]
The points of discharge for a non-drinking water service must—
have— (a)
a working pressure of not less than 50 kPa; and (i)
a static pressure within the building of not more than 500 kPa: or (ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside (b)
of (a)(i) and (a)(ii) are required.
B3P6 Uncontrolled discharge
[2019: BP3.3]
A non-drinking water service must avoid failure or uncontrolled discharge .
B3P7 Water efficiency
[New for 2022]
A non-drinking water service must ensure the efficient use of non-drinking water by—
limiting water usage from— (a)
a cistern or flushing device for a urinal, to a flush volume of not more than 2.5 litres for each— (i)
single urinal stall; or (A)
600mm length of a continuous urinal wall; and (B)B3P2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 95a dual flush cistern or flushing valve that is connected to a water closet pan, to a flush volume of not more (ii)
than—
6 and 3 litres; or (A)
4.5 and 3 litres; or (B)
water saving measures equivalent to or greater than those described in (a). (b)
Applications
The flush volumes of B3P7 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
±0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of B3P7 do not apply to a vacuum drainage system.
B3D1 Deemed -to-Satisfy Pr ovisions
[2019: B3.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B3P1 to B3P7 are satisfied by
complying with B3D2 and B3D5 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
B3D2 Distribution of non -drinking wat er
[2019: B3.2]
A non-drinking water service must not be connected to any outlet that supplies water for—
human consumption; or (a)
food preparation; or (b)
food utensil washing; or (c)
personal hygiene. (d)
NSW B3D3
VIC B3D3
B3D3 General requirements
[2019: B3.3]
A non-drinking water service must be in accordance with
Section 9
of AS/NZS 3500.1.Explanatory Information
Requirements for a non-drinking water service used for fire-fighting purposes are contained in Part B4 .
Deemed -to-Satisfy ProvisionsB3P7
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 96 B3D4 Bushfire prone areas
[New for 2022]
A non-drinking water service in designated bushfire prone areas must be in accordance with AS 3959.
B3D5 Water efficiency
[New for 2022]
(1) Cisterns or flushing devices for water closets must—
have a dual flushing mechanism; and (a)
be a minimum 3 Star WELS rating, discharging not more than 6 litres or 4.5 litres for a full flush. (b)
(2) Cisterns or flushing devices for urinals must—
be a minimum 2 Star WELS rating, discharging a volume of not more than 2.5 litres for each— (a)
single urinal stall; or (i)
600mm length of continuous urinal wall; and (ii)
not be set-cycled or activated by any method other than manual or use activation. (b)
Applications
The flush volumes of B3D5(2) and B3D5(3) may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of B3D5(2) and B3D5(3) do not apply to a vacuum drainage system. (1)
The requirements of B3D5(3)(b) do not apply to a programmed solenoid operated flushing system if programmed (2)
to shut down during extended periods of non-occupancy of a building.
Explanatory Information
Prior to installing a programmed solenoid operated flushing system, further advice should be sought from the •
Authority having jurisdiction.
Where sensor control is used for urinal flushing, sensors should be located to avoid unnecessary ‘nuisance’ flushing •
triggered by pedestrian traffic.
AS/NZS 6400 Water Efficient Products - Rating and labelling, provides the basis for the rating and labelling of a •
range of products under the mandatory Water Efficiency Labelling and Standards (WELS) Scheme.
B3D5 Water efficiency outlines the minimum level of water efficiency for certain plumbing products and fixtures, •
however the adoption of products and technologies of greater efficiency should be considered.
Explanatory Information: Cross -v olume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to non-drinking
water services. These include, but may not be limited to, those listed in Table B3. B3D4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 97 Table B3 : Cross -volume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Excavations for pipework adjacent
to a building and footingsB1 Structural provisions H1 Structure
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 Structure
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safety
Fixtures and fittings in a wet area F2 Wet areas and overflow
protectionH4 Health and amenity
Flues, chimneys, pipes, gas storage,
domestic fuel tanks, cooling or
heating appliances or other servicesC4 Protection of openings H3 Fire safety
Service pipework external to the
building and penetrations through
roof cladding in a bushfire prone
areaG5 Construction in bushfire prone
areasH7 Ancillary provisions and
additional construction requirements
Pipework sound insulation F7 Sound transmission and
insulationH4 Health and amenityB3D5
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 98
NSW Part B4
QLD Part B4
Introduction to this Part
This Part sets out requirements for any part of a fire-fighting water service from the point of connection or other acceptable
source(s) of supply to the fire-fighting equipment, including hydrants, hose reels, sprinkler services, automatic fire
suppression systems and wall drencher systems.
B4O1 Objective
[2019: BO4]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a fire-fighting water (a)
installation; and
ensure that a fire-fighting water installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a fire-fighting water installation is designed and is capable of being maintained so that throughout (f)
its serviceable life it will continue to satisfy Objectives (a) to (e).
B4F1 Fire -fighting wat er supply
[2019: BF4]
Fire-fighting equipment must be provided with adequate water for its intended purpose.
B4P1 Flow rate and pressure
[2019: BP4.1]
A fire-fighting water service must ensure that the water supply flow and pressures to fire-fighting equipment are to be
based on a minimum 95th percentile system performance for the correct functioning of the fire-fighting equipment.
B4P2 Access and isolation
[2019: BP4.1]
(1) A fire-fighting water service must ensure access for maintenance of mechanical components and operational controls. Part B4 Fire-fighting water services
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 99VIC B4P2(2)
(2) A fire-fighting water service must ensure the system can be isolated for testing and maintenance.
B4P3 Fire -fighting wat er storage
[New for 2022]
Water storage supplying fire-fighting systems must be sized suitably for the level of risk and supply arrangements.
B4P4 Uncontrolled discharge
[2019: BP4.1]
A fire-fighting water service must avoid failure or uncontrolled discharge .
B4D1 Deemed -to-Satisfy Pr ovisions
[2019: B4.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B4P1 to B4P4 are satisfied by
complying with B4D2 to B4D6 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
VIC B4D2
B4D2 General requirements
[2019: B4.2]
Fire-fighting water services for Class 2 to Class 9 buildings and structures must comply with the requirements of Part E1
of Volume One of the NCC.
Explanatory Information
NCC Volume One requires the installation of fire-fighting equipment including fire hose reels, fire hydrants and automatic
fire suppression systems in certain types of buildings.
The installation of fire-fighting water services in Class 1 buildings is not required by NCC Volume Two, however, where
these services are installed voluntarily, they must be in accordance with Part B4.
B4D3 Fire sprinkler systems
[New for 2022]
(1) Automatic fire sprinkler systems must be in accordance with—
AS 2118.1 for general systems; or (a)
AS 2118.4 for accommodation buildings not exceeding four stories ; or (b)
AS 2118.5 for home fire sprinkler systems. (c)
(2) Automatic fire sprinkler systems for combined sprinkler and hydrant systems in multi-storey buildings must be in
accordance with—
AS 2118.1 for general systems; or (a)
AS 2118.6 for multi-storey buildings; or (b)
FPAA101H for buildings which are less than 25m in effective height and contain Class 2 and Class 3 parts. (c)Deemed -to-Satisfy ProvisionsB4P2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 100
Explanatory Information
For residential fire sprinklers to FPAA101D Automatic Fire Sprinkler System Design - Drinking water supply, see Part
B1 Cold water services.
B4D4 Fire hydrants
[New for 2022]
Fire hydrants must be in accordance with AS 2419.1.
B4D5 Fire hose reels
[New for 2022]
Fire hose reels must be in accordance with AS 2441.
B4D6 Bushfire prone areas
[New for 2022]
Fire-fighting water services in designated bushfire prone areas must be in accordance with AS 3959.
Explanatory Information: Cross -v olume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to fire-fighting water
services. These include, but may not be limited to, those listed in Table B4.
Table B4: Cross -v olume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Excavations for pipework adjacent
to a building and footingsB1 Structural provisions H1 Structure
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 Structure
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safety
Fixtures and fittings in a wet area F2 Wet areas and overflow
protection H4 Health and amenity
Service pipework external to the
building and penetrations through
roof cladding in a bushfire prone
areaG5 Construction in bushfire prone
areasH7 Ancillary provisions and
additional construction requirementsB4D3
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 101 Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Flues, chimneys, pipes, gas storage,
domestic fuel tanks, cooling or
heating appliances or other servicesC4 Protection of openings H3 Fire safety
Pipework sound insulation F7 Sound transmission and
insulationH4 Health and amenityB4D6
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 102
Introduction to this Part
This Part sets out cross-connection hazards and corresponding Hazard Ratings .
B5O1 Objective
[2019: BO5]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to contamination of a drinking water (a)
supply; and
ensure that a water service installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a water service installation throughout its serviceable life will continue to satisfy the requirements (f)
of Objectives (a) to (e).
B5F1 Design and installation
[2019: BF5]
Water services must be designed and installed so as to operate in a way that avoids the likelihood of contamination of
any part of the drinking water supply, and minimises any adverse impact on building occupants, the Network Utility
Operator’s infrastructure, property and the environment.
B5P1 Contamination control
[2019: BP5.1]
Water services must be designed, constructed and installed to avoid contamination.
Applications
B5P1 applies to cold water, heated water , non-drinking water and fire-fighting water services.
Part B5 Cross -connection control
Objectives
Functional Statements
Performance Requirements
Verification Methods
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 103 B5V1 Determination of individual and zone hazard ratings
[New for 2022]
(1) Compliance with Performance Requirement B5P1 for individual protection and zone protection is verified by
compliance with B5V1.
(2) A hazard exists wherever it is possible for water or contaminants to enter a non-drinking water service or supply via
any potential cross-connection between itself and another separate non-drinking water service on the same site.
(3) Each hazard must be—
assigned a Hazard Rating in accordance with (4); and (a)
isolated from the drinking water service by an appropriate backflow prevention device which is selected and (b)
installed for the appropriate Hazard Rating in accordance with
Section 4
of AS/NZS 3500.1.(4) To determine the Hazard Rating —
an assessment of the property or proposed installation must be undertaken using Tables B5V1a , B5V1b , B5V1c , (a)
B5V1d and B5V1e ; and
the scores allocated from each table are calculated; and (b)
the Hazard Rating is determined by the sum of the scores in accordance with B5V1(5). (c)
(5) A total score of—
0 to 3 presents no Hazard; and (a)
4 to 7 presents a Low Hazard ; and (b)
8 to 10 presents a Medium Hazard ; and (c)
11 or greater presents a High Hazard . (d)
(6) Notwithstanding the Hazard Rating determined in (4), where access to the site is restricted in a way that could limit
or prevent future testing or maintenance of a backflow prevention device , the site must be protected with a
containment device suitable for a High Hazard .
Explanatory Information
The intent of this Verification Method is to provide a consistent means of determining Hazard Ratings for situations •
not listed in Specification 41 .
This Verification Method is not intended to enable the lowering of any Hazard Ratings already prescribed in •
Specification 41 .
Table B5V1a: Building class
Site condition Common examples Notes Score
The property to which the water service
is installed contains a Class 1, 2, 7a, or
10 building where not more than 12
people reside.Domestic residences and
carparks with no
associated activities.Building may use small amounts of
cleaning products, etc.1
The property to which the water service
is installed contains a Class 3, 4, 5, 6
or 7b building where chemical products
are not stored.Hostel, hotel and multi-
level office.Building is likely to have greater
than 12 residents and/or
occupants, and may contain
moderate amounts of cleaning or
commercial chemicals.2
The property to which the water service
is installed contains a Class 7b, 8 or 9
building where chemical products are
stored.Mechanical workshop,
metal finisher, cleaning
product wholesaler.May contain large amounts of
hazardous or toxic commercial
chemicals.3B5V1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 104 Table B5V1b: On-sit e water services
Table B5V1c: Drinking water use
Table B5V1d: Cross -connection type Site condition Common examples Notes Score
There is only a drinking water supply
and no other water sources to the
property.The drinking water source may be
a rainwater tank connected to a
detached dwelling.Residential rainwater tanks
are considered drinking
water .0
There is one drinking water supply
and potentially other non-drinking
water supplies or a separate fire-
fighting water service available to the
property (not applicable if the non-
drinking water supply is Network
Utility Operator provided recycled
water with a sewerage source).Network Utility Operator drinking
water supply and a separate fire
water service.Network Utility Operator
supplied recycled water with
a sewerage source is
assessed separately due to
greater health risks.3
Commercial agriculture, farming , turf
irrigation , industrial, processing or
chemical industries. The property is
supplied with drinking water and non-
drinking water from multiple sources
with potential for health related
contamination.Property has a Network Utility
Operator drinking water source and
an on-site wastewater effluent
irrigation system , process water or
bore water source.Increased potential for cross-
connection between drinking
water and non-drinking water
with high consequences such
as chemicals, recycled
sewerage, medical or
biological contaminants .5
Site condition Common examples Notes Score
Drinking water use will not involve
commercial use of hazardous or toxic
substances and the site is unsuitable
for their use and unlikely to change.Domestic residences, offices and
restaurants.Minor use of cleaning and
other chemicals is permitted.
Professional or commercial
hazardous chemical use is
not permitted.1
Drinking water will be used with
commercial use hazardous
substances, but not Schedule 1 to 4
or Schedule 6 to 8 poisons. Drinking
water may be used with commercial
use hazardous substances without
major modification.Butchers, hairdressers. Hazardous substances and
scheduled poisons have
applicable warning labels.
Cleaning of floors and
benches with chlorine
solution puts butchers into
this category.2
Drinking water use may involve large
scale food or beverage processing,
human or animal biological or faecal
matter, Schedule 1 to 4 and
Schedule 6 to 8 poisons and have
potential for contamination. The
installation is suitable for these uses
without major modification. Also
included are areas likely to undergo
frequent changes of use or where the
future use in unknown.Chemical packaging facilities,
hospital facilities, pan washing
apparatus, fertiliser injection
systems, chemical dispensers (high
toxicity), food preparation fixtures
with clean in place systems,
industrial shed complexes and light
commercial properties.Wash down of spills puts
chemicals packaging /
storage into this category
even if liquid batching and
storage is not practised. Also
applies where there is no
certainty about the type of
activities to be practiced and
the materials used.3
Site condition Common examples Notes Score
The product or installation presents
no possibility of cross-connection
to food, drink or water or other
liquid vessels other than those
used for domestic purposes.Residential units and offices. There are no water storage
tanks, swimming pools ,
spas or commercial
kitchens on site or able to
be installed.0B5V1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 105
Table B5V1e: Extent of contamination Site condition Common examples Notes Score
The product or installation presents
a potential for a cross-connection
between a drinking water service
and a commercial food, drink or
water or other liquid vessel, or any
vessel intended for low hazard
chemicals.Small scale food processing facilities. Potential backflow from low
volume of non-hazardous
substances. Non-
hazardous chemicals are
any substances not
required to display a
hazardous substance label. 1
The product or installation presents
a potential for a cross-connection
between a drinking water service
and a non-drinking water service.Drinking water outlets within close
proximity to an alternative water source
such as a Network Utility Operator
drinking water supply, bore or irrigation
system .Potential connection of a
drinking water system and
a system identified with a
Low Hazard .2
The product or installation presents
a potential for cross-connection
between the drinking water service
and a swimming pool , water
storage tank used for commercial
purposes, large scale food and
drink processing operations, a
vessel, pipe or body of liquid
containing a hazardous substance
or Schedule 5 poison, recycled
water service with biological matter
or faecal contamination.Building header tanks, commercial
swimming pool make up water
connections, soft drink manufacturers.Potential connection of a
drinking water system and
a system containing an
hazardous substance or
low toxicity poison or large
quantities of food or drink
product. Hazardous
chemicals are any
substances required to
display a hazardous
substance label.3
The product or installation presents
the potential for cross-connection
between the drinking water service
and a bulk water service vessel
containing a hazardous substance
or Schedule 5 poison.Chemical make-up water connected to
a chemical batching process.Any potential connection to
a system containing large
volumes of hazardous
material or moderately
poisonous material.4
The product or installation has
potential for a cross-connection to
a sewerage source, a trade waste
source, a vessel with human or
animal biological or faecal matter, a
vessel pipe or body of liquid
containing any quantity of a
Schedule 1 to 4 or Schedule 6 to 8
poison.Recycled water irrigation system with
drinking water back up supply.Applies to potential
connections with a high
health risk.5
Site condition Common examples Notes Score
The product or installation presents a
cross-connection that will only affect
1 small property (fewer than 10
people).Domestic residences Small site where a cross-
connection will affect the
drinking water to fewer than 10
people.1
The product or installation presents a
cross-connection that will affect a
moderate size property or multiple
small sites within the same property
(fewer than 100 people).Cafes or small restaurants on a
single title property.Cross-connection will potentially
affect drinking water to fewer
than 100 people.2B5V1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 106
B5D1 Deemed -to-Satisfy Pr ovisions
[2019: B5.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirement B5P1 is satisfied by complying with
B5D2 to B5D6 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
B5D2 Drinking water service
[2019: B5.2]
(1) A hazard exists wherever it is possible for water or contaminants to enter a drinking water service or supply via any
potential cross-connection between—
the drinking water service; and (a)
any of the following: (b)
A non-drinking water service. (i)
A rainwater service . (ii)
An alternative water supply. (iii)
A swimming pool . (iv)
Pipes, fixtures or specialist equipment (including boilers and pumps) containing chemicals, liquids, gases (v)
or other substances which may be harmful to health or safety.
(2) Each hazard must—
be assigned an Individual protection Hazard Rating or Zone protection Hazard Rating in accordance with S41C4 (a)
and S41C5 ; and
be isolated from the drinking water service by an appropriate backflow prevention device which is selected and (b)
installed in accordance with
Section 4
of AS/NZS 3500.1.(3) Where a site is served by a Network Utility Operator’s drinking water supply, appropriate containment protection must
be selected and installed in accordance with
Section 4
of AS/NZS 3500.1.B5D3 Non -drinking wat er service
[2019: B5.3]
(1) A hazard exists wherever it is possible for water or contaminants to enter a non-drinking water service or supply via
any potential cross-connection between itself and another separate non-drinking water service on the same site.
(2) Each hazard must—
be assigned a Containment protection Hazard Rating in accordance with S41C6 ; and (a)
be isolated from the non-drinking water service by appropriate containment protection which is selected and (b)
installed in accordance with
Section 4
of AS/NZS 3500.1. Site condition Common examples Notes ScoreThe product or installation presents a
cross-connection that will affect a
large property or could allow
contaminants to enter other
properties.Tenancies within a shopping
complex, connected via water
meters without Containment
protection .Cross-connection will affect
drinking water to 100 people or
greater. Consideration is
needed as to whether water
meters may not have suitable
backflow protection or may not
be adequate to mitigate the risk.3
Deemed -to-Satisfy ProvisionsB5V1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 107
Explanatory Information
A ‘separate non-drinking water service’ means one which draws water from a different source. For example, on a site
connected to both recycled water and bore water, both may be considered non-drinking water services, but are drawn
from different sources. Therefore, each would be a ‘separate non-drinking water service’.
B5D4 Fire -fighting wat er service
[2019: B5.4]
Each fire-fighting water service must—
be assigned a Hazard Rating in accordance with S41C7 ; and (a)
be isolated from the drinking water service by an appropriate backflow prevention device which is selected and (b)
installed in accordance with
Section 4
of AS/NZS 3500.1.B5D5 Unprotected water service
[New for 2022]
Water downstream of a backflow prevention device protected by individual protection or zone protection is considered to
be an unprotected water service .
NSW B5D6
SA B5D6
B5D6 Rainwater
[New for 2022]
Protection of drinking water services from rainwater must be in accordance with AS/NZS 3500.1 (2018) Clause 16.4 and
Table 16.4.
Applications
B5D6 applies to scenarios not covered by S41C6(1)(b) .
NSW B5D7B5D3
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 108
Introduction to this Part
This Part sets out the requirements for any part of a rainwater service from the point of connection of the rainwater storage ,
to the rainwater points of discharge.
This Part applies to a rainwater service supplied by stored rainwater collected from a roof, where a separate cold water
service is provided for drinking and personal hygiene from a Network Utility Operator’s supply.
This Part does not apply to rainwater used only for irrigation purposes.
Where water provided by a Network Utility Operator is not available or not utilised as the primary water source for drinking
and personal hygiene, roof collected rainwater is considered to be a cold water service supplied by an alternative source.
B6O1 Objective
[2019: BO6]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a rainwater service ; (a)
and
conserve water; and (b)
safeguard the environment; and (c)
safeguard public and private infrastructure; and (d)
ensure that a rainwater service installation throughout its serviceable life will continue to satisfy the requirements (e)
of Objectives (a) to (d).
B6F1 Rainwater service
[2019: BF6]
A rainwater service must be designed and installed so as to operate in a way that avoids the likelihood of inadvertent
contamination of any drinking water service and minimises any adverse impact on building occupants, the Network
Utility Operator’s infrastructure, property and the environment.
B6P1 Pressure
[2019: BP6.2]
The points of discharge of a rainwater service must—
have— (a)
a working pressure of not less than 50 kPa; and (i)
a static pressure within a building of not more than 500 kPa; or (ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside (b)Part B6 Rainwater services
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 109of (a)(i) and (a)(ii) are required.
B6P2 Velocity
[2019: BP6.2]
A rainwater service must ensure pipework water velocity does not exceed 3 m/s for more than 1% of the time that the
water is required during the normal peak flow.
Explanatory Information
During the hour of heaviest usage in reticulated rainwater service pipework, a velocity of 3 m/s must not be exceeded
for 99% of the time that any downstream fixture is in use.
B6P3 Water efficiency
[2019: BP6.2]
A rainwater service must ensure the efficient use of water by—
limiting water usage from— (a)
a cistern or flushing device for a urinal, to a flush volume of not more than 2.5 litres for each— (i)
single urinal stall; or (A)
600 mm length of a continuous urinal wall; and (B)
a dual flush cistern or flushing valve that is connected to a water closet pan, to a flush volume of not more (ii)
than—
6 and 3 litres; or (A)
4.5 and 3 litres; and (B)other rainwater using fixtures and appliances, to an efficient level; or (iii)
other water saving measures which achieve
equivalent or greater efficiency than (a). (b)
Applications
The flush volumes of B6P3 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of B6P3(a)(ii) do not apply to a vacuum drainage system.
B6P4 Access and isolation
[2019: BP6.2]
A rainwater service must ensure access for maintenance of mechanical components and operational controls. (a)
A rainwater service must ensure the system, appliances and devices can be isolated for testing and maintenance. (b)
B6P5 Identification
[2019: BP6.4]
Pipes and pipe outlets that form part of a rainwater service must be clearly identified. B6P1
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 110 B6P6 Uncontrolled discharge
[2019: BP6.2]
A rainwater service must avoid the likelihood of failure and uncontrolled discharge .
VIC B6P7
B6D1 Deemed -to-Satisfy Pr ovisions
[2019: B6.1]
VIC B6D1(1)
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B6P1 to B6P6 are satisfied by
complying with B6D2 to B6D6 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
SA B6D2
VIC B6D2
B6D2 General requirements
[2019: B6.5]
A rainwater service must comply with
Section 15
of AS/NZS 3500.1.B6D3 Identification
[2019: B6.5]
Identification of rainwater pipework and outlets must be in accordance with
Section 15
of AS/NZS 3500.1.B6D4 Water efficiency
[New for 2022]
(1) Cisterns or flushing devices for water closet pans must—
be a minimum of 3 Star WELS rating, discharging not more than 6 litres or 4.5 litres for a full flush; and (a)
have a dual flushing mechanism. (b)
(2) Cisterns or flushing devices for urinals must—
be a minimum of 2 Stars WELS rating, discharging not more than 2.5 litres; and (a)
serve a single stall or 600 mm length of continuous urinal wall; and (b)
not be automatic or set-cycle. (c)
Applications
The flush volumes of B6D4 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Deemed -to-Satisfy ProvisionsB6P6
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 111Exemptions
The requirements of B6D4 do not apply to a vacuum drainage system. (1)
The requirements of B6D4(2)(c) do not apply to a programmed solenoid operated flushing system if programmed (2)
to shut down during extended periods of non-occupancy of a building.
Explanatory Information
Prior to installing a programmed solenoid operated flushing system, further advice should be sought from the •
authority having jurisdiction.
Where sensor control is used for urinal flushing, sensors should be located to avoid unnecessary ‘nuisance’ flushing •
triggered by pedestrian traffic.
AS/NZS 6400 Water Efficient Products - Rating and Labelling, provides the basis for the rating and labelling of a •
range of products under the mandatory Water Efficiency Labelling and Standards (WELS) scheme.
B6D4 Water efficiency outlines the minimum level of water efficiency for certain plumbing products and fixtures, •
however the adoption of greater efficiency products and technologies should be considered.
B6D5 Access and isolation
[New for 2022]
(1) Access for maintenance of mechanical components and operational controls must be provided in accordance with
AS/NZS 3500.1.
(2) Isolation of appliances and backflow prevention devices for testing and maintenance must be provided in accordance
with AS/NZS 3500.1.
B6D6 Bushfire prone areas
[New for 2022]
A rainwater service in a designated bushfire prone area must be in accordance with AS 3959.B6D4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 112
Introduction to this Part
This Part sets out the requirements for rainwater storage and applies from the point of rainwater entry to the rainwater
storage to the point of connection to the cold or rainwater service (as applicable).
This Part applies to the storage of water intended for drinking and personal hygiene use as an alternative water source
supplying a cold water service.
This Part applies to rainwater provided for non-drinking purposes where water for drinking and personal hygiene is provided
by the Network Utility Operator .
This Part does not apply to rainwater stored for the purposes of fire-fighting water services or an irrigation system .
State, Territory or Local Government Authorities may in some areas require the mandatory installation of rainwater tanks.
Consultation with the relevant authority having jurisdiction is recommended.
B7O1 Objective
[2019: B06]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a rainwater storage ; (a)
and
conserve water; and (b)
safeguard the environment; and (c)
safeguard public and private infrastructure; and (d)
ensure that the rainwater storage throughout its serviceable life will continue to satisfy the requirements of (e)
Objectives (a) to (d).
B7F1 Rainwater storage
[2019: BF6]
Rainwater storage systems must be designed and installed so as to operate in a way that avoids the likelihood of
inadvertent contamination of any drinking water service, and minimises any adverse impact on building occupants, the
Network Utility Operator’s infrastructure, property and the environment.
B7P1 Contamination control
[2019: BP6.1]
VIC B7P1(1)
(1) Stored rainwater must reduce the likelihood of contamination.
VIC B7P1(2)
(2) Stored rainwater must not pose a hazard to public health. Part B7 Rainwater storage
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 113 B7P2 Uncontrolled discharge
[2019: BP6.2]
Rainwater storage must avoid the likelihood of failure or uncontrolled discharge .
B7P3 Access and isolation
[2019: BP6.2]
(1) Rainwater storage must allow access for cleaning and maintenance.
(2) Rainwater storage must allow for the system to be isolated.
VIC B7P4
B7P4 Identification
[2019: BP6.4]
Rainwater storage and holding tanks used only for non-drinking purposes must be clearly identified.
Exemptions
Where rainwater storage is intended to supply water for drinking and personal hygiene, identification of the storage and
holding tanks is not required .
B7D1 Deemed -to-Satisfy Pr ovisions
[2019: B6.1]
VIC B7D1(1)
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B7P1 and B7P4 are satisfied by
complying with B7D2 and B7D3 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2 (3) and A2G4 (3) as applicable.
Notes
There are no Deemed-to-Satisfy Solutions for B7P2 and B7P3 .
TAS B7D2
B7D2 Collection of rainwater
[2019: B6.2]
Rainwater storage must only collect roof water.
Explanatory Information
The Environmental Health Committee (enHealth) has produced a document, Guidance on the use of rainwater tanks.
This guidance document includes information on design and installation as well as the potential contribution of rainwater
tanks to improved water conservation.
Any cold water service from a Network Utility Operator’s drinking water supply to a rainwater storage system top up or
switching device must comply with Part B1 .
Deemed -to-Satisfy ProvisionsB7P2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 114
VIC B7D3
B7D3 Identification
[2019: B6.5]
The rainwater storage must be identified as rainwater in accordance with AS/NZS 3500.1.
Exemptions
Where rainwater storage is intended to supply water for drinking and personal hygiene, identification of the storage and
holding tanks is not required.
VIC B7D4B7D2
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 115
S41C1 Scope
[2019: BS5.1.1]
This Specification sets out cross-connection hazards and corresponding Hazard Ratings .
Explanatory Information
This Specification only prescribes Hazard Ratings for a limited list of known hazards. It does not cover every potential
cross-connection that may arise from time to time.
Where a situation arises which is not listed in this Specification, the appropriate Hazard Rating may be determined as
a Performance Solution , such as a Performance Solution developed using Verification Method B5V1 .
S41C2 Application
[2019: BS5.1.2]
The Hazard Ratings prescribed in this Specification must be used for selecting the required backflow prevention device ,
for the purposes of compliance with the Deemed-to-Satisfy Provisions .
S41C3 Protection types and hazard ratings
[2019: BS5.1.3]
(1) Cross-connection hazards within the site must be rated in accordance with—
S41C4 for individual protection at the point of each individual hazard; or (a)
S41C5 for zone protection at the point where a group of hazards can be isolated. (b)
(2) The hazard posed by the site to the Network Utility Operator’s drinking water supply must be rated for containment
protection in accordance with S41C6 .
VIC S41C3(3)
(3) Pipework and outlets supplied by a drinking water source downstream of an individual protection backflow prevention
device are considered to convey drinking water from an unprotected water service .
S41C4 Individual protection
[2019: BS5.1.4]
(1) The following are Low Hazard for the purpose of individual protection :
Carbonated drink dispensing machines. (a)
Drinking fountains and bottle fillers. (b)
Coils and jackets in heat exchangers, in sealed and non-toxic environments only. (c)
Drink dispensing equipment including vending machines and coffee machines. (d)
External hose taps, with no hazards within 18 m. (e)
Fixtures used for ablutions including baths, basins, showers and bidettes with a minimum 25 mm air gap. (f)
Toilet douche seats where the outlet in all positions is at least 25 mm above the overflow level of the pan. (g)
Fixtures used for food preparation, including sinks. (h)
Flexible connections over domestic fixtures. (i)
Haemodialysis machines in Class 1 , Class 2 and Class 10 buildings. (j)Specification 41 Cross -connection hazards
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 116Hair salon basins or troughs. (k)
In-line water softeners and filters. (l)
Photographic processing machines without developer mixing. (m)
Emergency eye wash and shower stations for use with drinking water . (n)
Food preparation or food storage tanks, vats or vessels (without clean-in-place systems). (o)
(2) The following are Medium Hazard for the purpose of individual protection :
Chemical dispensers (low toxicity). (a)
Dental consoles. (b)
VIC S41C4(3)
(3) The following are High Hazard for the purpose of individual protection :
Chlorinators. (a)
Coils and jackets in heat exchangers, in unsealed and toxic environments. (b)
Steam calorifiers. (c)
Steam boilers . (d)
Antibiotic injectors (agricultural). (e)
Bidets and toilet douche seats where the outlet in any position is not 25 mm above the overflow level of the pan. (f)
Bidettes installed without a minimum 25 mm air gap. (g)
Handheld bidet hoses and trigger sprays. (h)
Chemical dispensers (high toxicity). (i)
Cooling towers. (j)
Demineralising equipment using ion-exchange resins with acid and alkali regeneration. (k)
Equipment used for handling, mixing, measuring and processing chemical and microbiological substances. (l)
Fogging and cleaning sprays with chemical injection or additives. (m)
Mixing of chemicals. (n)
Pan washing apparatus. (o)
Photographic developers with drinking water supply rinse tanks or mixing facilities. (p)
Plants with auxiliary non-drinking water supplies. (q)
Type D irrigation system injected with fertilisers, herbicides, nematicides, insecticides or weedicides. (r)
Weed and pest spraying and water cartage tanks. (s)
Portable and mobile tankers. (t)
Placenta / surgical waste disposal units. (u)
Food preparation or food storage tanks, vats or vessels (with clean-in-place systems). (v)
Explanatory Information: Clean -in-place syst ems
For the purposes of S41C4(1)(o) in individual protection , clean-in-place is a method of cleaning the internal surfaces of
pipes, vessels, process equipment, filters and associated fittings, without disassembly.
Explanatory Information
For the purposes of S41C4(3)(f), the high hazard backflow prevention device can be part of the toilet douche seat or
installed separately.
S41C4
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 117 S41C5 Zone protection
[2019: BS5.1.5]
(1) The following are Low Hazard for the purpose of zone protection :
Fire-fighting water storage tanks without chemical additives. (a)
Food storage tanks, vats or vessels. (b)
Hair salon basins or troughs. (c)
Type B irrigation systems . (d)
Water filtration equipment. (e)
(2) The following are Medium Hazard for the purpose of zone protection :
Type C irrigation systems . (a)
Beauty spas and foot salons. (b)
(3) The following are High Hazard for the purpose of zone protection :
Photographic laboratories. (a)
Aircraft facilities. (b)
Secondary school laboratories, including fume cupboards. (c)
Dental and medical procedure rooms and equipment using drinking water . (d)
Clean-in-place systems. (e)
Commercial laundries. (f)
Cooling or heating systems with recirculating water. (g)
Dockside facilities. (h)
Drinking nipples and troughs (agricultural). (i)
Food preparation or food storage tanks, vats or vessels. (j)
Vats and vessels (clean-in-place systems). (k)
In a Class 9 building— (l)
dissecting rooms; and (i)
utility rooms which contain fixtures other than hand basins; and (ii)
operating theatres. (iii)
Industrial and teaching laboratories. (m)
Industrial process water that has been recirculated. (n)
Mortuary equipment used in funeral parlours, mortuaries and autopsy areas. (o)
Sanitary dump points. (p)
Tanks, vats or vessels associated with electroplating, degreasing, descaling, stripping, pickling, dipping or the (q)
like.
Type D irrigation systems injected with fertilisers, herbicides, nematicides, insecticides or weedicides. (r)
VIC S41C6
S41C6 Containment protection
[2019: BS5.1.6]
(1) The following are Low Hazard for the purpose of containment protection :
A water service provided to a Class 1 , Class 2 , Class 7a or Class 10 building where— (a)
not more than 12 persons reside; and (i)
the building may only use non-commercial amounts of cleaning products. (ii)S41C5
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 118Premises served by a rainwater harvesting system, not including any rainwater storage tanks that are buried (b)
tanks .
A water service where there are no non-drinking water services within the property. (c)
(2) The following are Medium Hazard for the purpose of containment protection :
A water service provided to a Class 3 , Class 4 , Class 5 , Class 6 or Class 7b building where chemicals are not (a)
stored.
A water service provided to a property that has— (b)
other non-drinking water services; or (i)
a separate fire water service. (ii)
(3) The following are High Hazard for the purpose of containment protection :
A water service provided to a Class 7b building where chemicals may be stored. (a)
A water service provided to a Class 8 or Class 9 building. (b)
A water service provided to a property used for commercial agriculture, farming, turf irrigation, industrial, (c)
processing or chemical industries.
A water service provided to a property that has non-drinking water services from multiple sources with potential (d)
for health related contamination.
Applications
Medium Hazard properties for the purpose of containment protection include the following— (a)
Caravan parks. (i)
Food and beverage processing plants. (ii)
Marinas. (iii)
Premises that are connected to a grey water re-use system or a reticulated and disinfected reclaimed water (iv)
system.
Public swimming pools . (v)
High Hazard properties for the purpose of containment protection include the following— (b)
Abattoirs. (i)
Car and plant washing facilities. (ii)
Chemical laboratories. (iii)
Chemical plants. (iv)
Factories using, processing or manufacturing toxic chemicals. (v)
Hospitals, mortuaries, dental surgeries, clinics or day surgeries and the like containing patient care areas (vi)
such as an operating theatre, minor procedures consultation room, resuscitation, intensive care and coronary
care.
Metal finishing plants. (vii)
Pathology laboratories. (viii)
Petroleum processing and storage plants and facilities. (ix)
Piers, docks and other waterfront facilities. (x)
Premises where access to conduct inspections is restricted. (xi)
Sanitary depots. (xii)
Sewerage treatment plants and sewerage lift stations. (xiii)
Universities. (xiv)
Premises containing wastewater dump points. (xv)
Industrial processing. (xvi)
Chemical industries. (xvii)
S41C6
(1 May 2023)
Water services
NCC 2022 Volume Three - Plumbing Code of Australia Page 119Exemptions
Clause (1)(b) does not apply to a non-drinking water service provided to the property by a Network Utility Operator (1)
as part of a dual water supply.
Clause (2)(b)(i) does not apply to a non-drinking water service provided to the property by a Network Utility (2)
Operator .
Explanatory Information
Clause (2)(a); building Classes 3, 4, 5, 6, and 7b are likely to have greater than 12 occupants (residents and/or •
workers) and may contain moderate amounts of cleaning or commercial chemicals, or a separate fire-fighting water
service.
Clause (3)(b) and (3)(c); a property presents a risk from wastewater effluent irrigation system , process water and/or •
bore water. The property has an increased potential for cross-connection between drinking water and non-drinking
water with high consequences such as chemicals, recycled sewerage, medical, biological, toxic or hazardous
substances.
In some jurisdictions, regulations issued under water supply legislation, and/or rules set by a Network Utility •
Operator , may prescribe containment protection which differs from this Specification. If this occurs then those
regulations and/or rules should be followed in place of this Specification. This Specification only applies for the
purposes of compliance with Volume Three of the NCC. It is not intended to limit or extend the application of other
regulations.
S41C7 Fire -fighting wat er services
[2019: BS5.1.7]
(1) The following fire-fighting water services are Low Hazard :
A fire-fighting water service which has— (a)
a direct connection to a Network Utility Operator’s water supply; and (i)
does not contain a tank, reservoir, connection to another water supply, antifreeze or other additives, or fire (ii)
brigade booster connection from an auxiliary water supply,
Domestic fire sprinkler systems installed in Class 1 buildings. (b)
FPAA101D fire sprinkler systems. (c)
Fire-fighting water storage tanks. (d)
(2) Any fire-fighting water services not referred to in (1) are Medium Hazard .
Notes
Fire hose reels located within an area where a cross-connection hazard exists have a Hazard Rating the same as the
areas within reach of the hose. S41C6
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 120
Section C Sanitary plumbing and drainage systems
Part C1 Sanitary plumbing systems
Objectives
C1O1 Objective
Functional Statements
C1F1 Disposal system
Performance Requirements
C1P1 Disposal
C1P2 Access
C1P3 Water efficiency
C1P4 Uncontrolled discharge
C1P5 Ventilation
C1P6 Contamination
C1P7 Damage
Verification Methods
C1V1 Determination of sanitary plumbing wastewater flowrates
C1V2 System 1 - Common discharge design
C1V3 System 2 - Common discharge design
C1V4 System 3 - Branch design
C1V5 Stack design
Deemed-to-Satisfy Provisions
C1D1 Deemed -to -Satisfy Provisions
C1D2 Invert levels
C1D3 General requirements
C1D4 Bushfire prone areas
C1D5 Water efficiency
Part C2 Sanitary drainage systems
Objectives
C2O1 Objective
Functional Statements
C2F1 Disposal system
C2F2 Swimming pool wastewater disposal
Performance Requirements
C2P1 Disposal
C2P2 Swimming pool drainage
C2P3 Access
C2P4 Ventilation
C2P5 Contamination
C2P6 Uncontrolled discharge
C2P7 Damage
Verification Methods
C2V1 Velocity and liquid -to -air ratio
C2V2 Pressure testing
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 121C2V3 Determination of sanitary drainage wastewater flowrates
Deemed-to-Satisfy Provisions
C2D1 Deemed -to -Satisfy Provisions
C2D2 Invert levels
C2D3 Swimming pool drainage
C2D4 General requirements
C2D5 Bushfire prone areas
Part C3 On-site wastewater management
Objectives
C3O1 Objective
Functional Statements
C3F1 On-site wastewater management
Performance Requirements
C3P1 Health impacts
C3P2 Environmental impacts
C3P3 Community systems
C3P4 Discharge to a Network Utility Operator sewer
C3P5 General requirements
C3P6 Land application systems
C3P7 Access for maintenance
C3P8 Uncontrolled discharge
C3P9 Identification
Deemed-to-Satisfy Provisions
C3D1 Deemed -to -Satisfy Provisions
C3D2 Septic tanks
C3D3 Composting toilets
C3D4 Secondary treatment systems
C3D5 Domestic grey water treatment systems
C3D6 Land application systems
C3D7 Common effluent drainage systems
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 122
Introduction to this Part
This Part sets out the requirements for any part of a sanitary plumbing system of a property including from sanitary fixtures
and appliances from the point of connection to a sanitary drainage system.
C1O1 Objective
[2019: CO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a sanitary plumbing (a)
installation; and
ensure that a sanitary plumbing installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a sanitary plumbing installation is designed and is capable of being maintained so that throughout (f)
its serviceable life it will continue to satisfy Objectives (a) to (e).
C1F1 Disposal system
[2019: CF1]
Sanitary fixtures and sanitary appliances must be provided with an adequate disposal system that does not impact
adversely on the occupants of the premises, property, the environment or the Network Utility Operator’s infrastructure.
C1P1 Disposal
[2019: CP1.1]
A sanitary plumbing system must ensure sewage or sullage is transferred to a sanitary drainage system or an approved
disposal system .
Explanatory Information: Non -flushing (wat erless ) urinals
Where a non-flushing (waterless) urinal is to be installed to a sanitary plumbing system comprising copper, copper alloy
or other metallic piping, undiluted discharge transported through such pipework may increase the likelihood of corrosion.
Practitioners should also be aware that undiluted discharge, transported through pipework of any material, can cause
a build-up of struvite (ammonium magnesium phosphate) inside the pipework, potentially causing blockage within the
sanitary plumbing system.
Part C1 Sanitary plumbing systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 123 C1P2 Access
[2019: CP1.1]
A sanitary plumbing system must ensure access for maintenance of mechanical components, operational controls and for
clearing blockages .
C1P3 Water efficiency
[2019: CP1.1]
A sanitary plumbing system must ensure efficient use of drinking water by—
limiting water usage from— (a)
a cistern or flushing device for a urinal, to a flush volume of not more than 2.5 litres for each— (i)
single urinal stall; or (A)
600 mm length of a continuous urinal wall; and (B)
a dual flush cistern or flushing valve that is connected to a water closet pan to a flush volume of not more (ii)
than—
6 and 3 litres; or (A)
4.5 and 3 litres; or (B)
water saving measures equivalent to or greater than those described in (a). (b)
Applications
The flush volume of C1P3 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (b)
±0.2 litres for a 4.5/3 litre cistern. (c)
Exemptions
The requirements of C1P3 do not apply to a vacuum drainage system.
C1P4 Uncontrolled discharge
[2019: CP1.1]
A sanitary plumbing system must avoid blockage or uncontrolled discharge .
C1P5 Ventilation
[2019: CP1.1]
A sanitary plumbing system must ensure that ventilation is provided to avoid hydraulic load imbalance such that—
there is less than a 1% likelihood during the annual peak hour that when any fixture discharges, air pressure at (a)
any trap seal exceeds ±375 Pa difference from atmospheric pressure; or
an equivalent level of safety to human health is achieved as a system complying to (a). (b)
Exemptions
C1P5 Ventilation does not apply to vacuum drainage systems.
C1P2
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 124 C1P6 Contamination
[2019: CP1.1]
A sanitary plumbing system must avoid—
entry of water, sewerage and sullage from the system into buildings; and (a)
entry of foul gases from the system into buildings, such that— (b)
at pressures of up to ±375 Pa, water trap seals will not be reduced to depths less than 70 mm for trap seals (i)
in pressurised rooms and 25 mm for all other applications; or
an equivalent level of safety to human health is achieved as a system complying to (i); and (ii)
entry of surface water , subsurface water and stormwater into the system. (c)
C1P7 Damage
[2019: CP1.1]
A sanitary plumbing system must avoid damage from superimposed loads, ground movement or root penetration.
C1V1 Determination of sanitary plumbing wastewater flowrates
[New for 2022]
(1) Compliance with C1P3 for pipe sizing is verified for each sanitary plumbing pipework section when the discharge
flowrate is not less than the greater of—
the probable simultaneous wastewater flowrate calculated in accordance with (2); or (a)
the Discharge Unit (DU) value of the highest fixture connected upstream of the pipework section as given in (b)
Table C1V1b , in litres per second.
(2) For the purposes of (1)(a), for each pipework section, the design probable simultaneous wastewater flowrate must
be calculated in accordance with the following:
(3) In the equation shown at (2)—
= the probable simultaneous wastewater flowrate for that pipework section (l/s); and (a)
= the sum of any other wastewater flowrates such as pumped discharges (l/s); and (b)
= the frequency factor given in Table C1V1a (dimensionless); and (c)
= the sum of the discharge units as given in Table C1V1b , connected upstream of that pipework section (d)
(dimensionless).
Table C1V1a: Frequency factors
Verification Methods
QTot alKDUQOt he r
QTotal
QOt he r
K
DU
Fixture usage NCC building classes Frequency factor (K)
Intermittent use e.g. dwelling,
guesthouse or officeClass 1, Class 2, Class 3 or Class 4 0.5
Frequent use e.g. hospital, restaurant
or hotelClass 5, Class 6, Class 7, Class 8,
Class 9a or Class 9c0.7
Congested use e.g. open to general
public, schoolClass 9b 1.0
Special use e.g. laboratory Not applicable 1.2C1P6
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 125 Table C1V1b: Discharge units
Explanatory Information
System types referred to in Table C1V1b are as follows:
System 1 - A sanitary plumbing system where branch discharge pipes are designed with a filling degree of 50%. •
System 2 - A sanitary plumbing system where branch discharge pipes are designed with a filling degree of 70%. •
System 3 - A sanitary plumbing system where branch discharge pipes are designed with a filing degree of 100%. •
Systems 1 and 2 are similar to the fully vented modified system and System 3 is similar to the single stack system •
detailed in AS/NZS 3500.2.
Filling degree is defined as the ratio between the height of fluid in a pipe (h) and the diameter of the pipe (D), or •
h/D.
C1V2 System 1 - Common discharge design
[New for 2022]
(1) Compliance with C1P5 for pipe sizing is verified for each common discharge branch when—
pipework is in accordance with (2); and (a)
ventilation is in accordance with (3). (b)
(2) Each unvented common discharge pipe within the system must have—
a pipe length from trap weir to stack less than 4 m; and (a)
no more than three 90º bends, excluding the first bend after the trap outlet; and (b)
no vertical drops of greater than 45º inclination between the trap weir and the stack greater than 1 m; and (c)
a gradient greater than 1.00%; and (d)
a pipe size in accordance with Table C1V2 . (e)
(3) Each vented common discharge pipe within the system must have—
a pipe length from trap weir to the stack of less than 10 m; and (a)
no vertical drops of greater than 45º inclination, between the trap weir and the stack greater than 3 m; and (b)
a gradient greater than 0.50%; and (c)
a pipe size in accordance with Table C1V2 ; and (d)
a group vent sized in accordance with Table C1V2 ; and (e)
each group vent either— (f)
terminates to atmosphere or interconnects with another vent in accordance with AS/NZS 3500.2; or (i)
terminates at an air admittance valve with a minimum airflow rate equal to the wastewater design flowrate. (ii)
Fixture System 1 System 2 System 3
Basin 0.5 0.3 0.3
Shower 0.6 0.4 0.4
Urinal 0.8 0.5 0.4
Bath 0.8 0.6 1.3
Kitchen sink 0.8 0.6 1.3
Water closet 2.0 1.8 1.2
Washing machine - up to 6
kg0.8 0.6 0.6
Domestic dishwasher 0.8 0.6 0.2C1V1
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 126Limitations
Water closets must only be connected to a DN 80 or DN 100 discharge pipe.
Table C1V2 : Common discharge pipe capacity
C1V3 System 2 - Common discharge design
[New for 2022]
(1) Compliance with C1P5 relating to pipe sizing is verified for each common discharge branch when—
pipework is in accordance with (2); and (a)
ventilation is provided in accordance with (3). (b)
(2) Each unvented common discharge pipe within the system must have—
a pipe length from trap weir to stack less than 10 m; and (a)
no more than one 90º bend, excluding the first bend after the trap outlet; and (b)
no vertical drops of greater than 45º inclination between the trap weir and the stack, greater than— (c)
1 m, where a water closet is connected to the branch; or (i)
3 m, where no water closets are connected to the branch; and (ii)
a gradient greater than 1.50%; and (d)
a pipe size in accordance with Table C1V3 . (e)
(3) Each vented common discharge pipe within the system has—
no vertical drops of greater than 45º inclination between the trap weir and the stack greater than 3 m; and (a)
a gradient greater than 1.50%; and (b)
a pipe size in accordance with Table C1V3 ; and (c)
a group vent sized in accordance with Table C1V3 ; and (d)
each group vent either— (e)
terminates to atmosphere or interconnects with another vent in accordance with AS/NZS 3500.2; or (i)
terminates to an air admittance valve with a minimum airflow rate equal to 2 times the wastewater design (ii)
flowrate.
Limitations
Water closets must only be connected to a DN 80 or DN 100 discharge pipe. (1)
No more than one water closet can be connected to a DN 80 discharge pipe. (2)
Table C1V3 : System 2 - Common discharge pipe capacity
Common discharge pipe -
Nominal diameter (DN)Unvented capacity QTotal -
Litres per second (l/s)Vented capacity QTotal -
Litres per second (l/s)Group vent - Nominal
diameter (DN)
40 0.50 0.75 32Common discharge pipe
size - Nominal diameter
(DN)Unvented capacity QTotal -
Litres per second (l/s)Vented capacity QTotal -
Litres per second (l/s)Group vent - Nominal
diameter (DN)
40 0.50 N/A N/A
50 0.80 0.75 40
65 1.00 1.50 40
80 2.00 3.00 50
100 2.50 3.75 65C1V2
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 127
C1V4 System 3 - Branch design
[New for 2022]
(1) Compliance with C1P5 relating to pipe sizing is verified for each discharge branch when—
each unvented fixture, or combination of fixtures, connects independently to the stack in accordance with Table (a)
C1V4a ; and
each vented fixture, or combination of fixtures, connects to the stack in accordance with Table C1V4b . (b)
(2) Ventilation requirements must be in accordance with the following:
Each trap vent must be— (a)
not less than DN 50, where the connection of the vent to the branch is liable to blockage due to splashing (i)
or submergence; or
DN 32, where the connection of the vent to the branch is not liable to blockage due to splashing or (ii)
submergence.
Each trap vent connects within 750 mm of the fixture it serves. (b)
Each trap vent must— (c)
terminate at atmosphere or interconnect with another vent in accordance with AS/NZS 3500.2; or (i)
connect to a common trap vent at least 40 mm in diameter; or (ii)
connect to the stack above the flood level of the highest fixture; or (iii)
terminate to an air admittance valve with a minimum airflow rate equal to 2 times the wastewater design (iv)
flowrate.
(3) Each branch connection must use a sweep or 45° junction where the branch is—
an equal diameter to the stack; and (a)
the stack is DN 80 or larger. (b)
Table C1V4a: System 3 - Unvented fixture connections
Fixture Waste Nominal
Diameter (DN)Maximum
length, in
metres (m)Minimum
gradient (%)Maximum gradient (%) Maximum number of
bendsMaximum
vertical drop, in
metres (m)
Basin 32 1.7 2.2 2.2 0 0
Basin 32 1.1 4.4 4.4 0 0
Basin 32 0.7 8.7 8.7 0 0
Basin 40 3 1.8 4.4 2 0
Basin group ≤4
basins50 4 1.8 4.4 0 0
Bidet 32 1.7 2.2 2.2 0 0
Bidet 32 1.1 4.4 4.4 0 0
Bidet 32 0.7 8.7 8.7 0 0
Bidet 40 3 1.8 4.4 2 0
Shower 40 No limit 1.8 9 No limit 1.5Common discharge pipe -
Nominal diameter (DN)Unvented capacity QTotal -
Litres per second (l/s)Vented capacity QTotal -
Litres per second (l/s)Group vent - Nominal
diameter (DN)
50 1.00 1.50 32
65 1.50 2.25 40
80 2.25 3.40 40
100 2.50 3.75 50C1V3
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 128
Table C1V4b: System 3 - Vented fixture connections
Fixture Waste Nominal
Diameter (DN)Maximum
length, in
metres (m)Minimum
gradient (%)Maximum gradient (%) Maximum number of bends Maximum vertical drop, in
metres (m)
Basin 32 3 1.8 No limit 2 3
Basin 40 3 1.8 No limit No limit 3
Basin group ≤5
basins50 7 1.8 4.4 No limit No limit
Basin group
≤10 basins50 10 1.8 4.4 No limit No limit
Bidet 32 3 1.8 No limit 2 3
Bidet 40 3 1.8 No limit No limit 3
Shower 40 No limit 1.8 No limit No limit No limit
Bath 40 No limit 1.8 No limit No limit No limit
Single urinal 40 3 1.8 No limit No limit 3
>1 Single
urinal 50 No limit 1.8 No limit No limit No limitFixture Waste Nominal
Diameter (DN)Maximum
length, in
metres (m)Minimum
gradient (%)Maximum gradient (%) Maximum number of
bendsMaximum
vertical drop, in
metres (m)
Bath 40 No limit 1.8 9 No limit 1.5
Single urinal 40 3 1.8 9 No limit 1.5
Slab urinal 65 3 1.8 9 No limit 1.5
Sink - kitchen 40 No limit 1.8 9 No limit 1.5
Trough -
laundry40 3 1.8 9 No limit 1.5
Domestic
dishwasher40 3 1.8 4.4 No limit 1.5
Domestic
clothes washing
machine - up
to 6 kg40 3 1.8 4.4 No limit 1.5
Water closet 80 No limit 1.8 No limit No limit 1.5
Water closet 100 No limit 1.8 No limit No limit 1.5
Water closet
group ≤8 water
closets100 15 0.9 9 2 1.5
Food waste
disposal unit40 3 13.5 No limit No limit 1.5
Sanitary
napkin
disposal unit40 3 5.4 No limit No limit 1.5
Floor waste
gully50 No limit 1.8 No limit No limit 1.5
Floor waste
gully80 No limit 1.8 No limit No limit 1.5
Floor waste
gully100 No limit 1.8 No limit No limit 1.5C1V4
(1 May 2023)
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NCC 2022 Volume Three - Plumbing Code of Australia Page 129
Limitations
The maximum number of bends permitted is measured from the fixture trap weir to the connection to the stack, (1)
excluding the first bend after the trap weir.
The maximum pipe length is measured from the fixture trap weir to the connection to the stack. (2)
A slab urinal must not cater for more than 7 people. Additional waste outlets may be required for longer urinals. (3)
Where a water closet is connected, sweep or 45º junctions must be used to connect to the stack. (4)
Bottle and resealing traps are not permitted for food waste disposal units or sanitary napkin disposal units. (5)
C1V5 Stack design
[New for 2022]
(1) Compliance with C1P5 relating to pipe sizing is verified for the stack system when—
each stack has a pipe size in accordance with (2); and (a)
ventilation is provided in accordance with (3). (b)
(2) Each stack must have a pipe size in accordance with—
Table C1V5a , where a separate relief vent is not provided; or (a)Fixture Waste Nominal
Diameter (DN)Maximum
length, in
metres (m)Minimum
gradient (%)Maximum gradient (%) Maximum number of
bendsMaximum
vertical drop, in
metres (m)
Trough urinal 50 3 1.8 No limit No limit 3
Slab urinal 65 3 1.8 No limit No limit 3
Sink - kitchen 40 No limit 1.8 No limit No limit No limit
Trough -
laundry40 3 1.8 No limit No limit No limit
Domestic
dishwasher40 No limit 1.8 No limit No limit No limit
Domestic clothes washing
machine (up to
6 kg)40 No limit 1.8 No limit No limit No limit
Water closet 80 No limit 1.8 No limit No limit No limit
Water closet 100 No limit 1.8 No limit No limit No limit
Water closet group ≤8 100 15 0.9 No limit No limit No limit
Food waste disposal unit 40 3 13.5 No limit No limit 3
Sanitary
napkin
disposal unit40 3 5.4 No limit No limit 3
Floor waste
gully50 No limit 1.8 No limit No limit No limit
Floor waste
gully80 No limit 1.8 No limit No limit No limit
Floor waste
gully100 No limit 1.8 No limit No limit No limit
Small potato
peeler40 3 13.5 No limit No limit 3C1V4
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 130Table C1V5b , where a separate relief vent is provided. (b)
(3) Ventilation must comply with the following:
Each stack vent must terminate either to— (a)
the atmosphere or interconnect with another vent in accordance with AS/NZS 3500.2; or (i)
an air admittance valve with a minimum airflow rate equal to 8 times the wastewater design flowrate. (ii)
Each stack vent must be sized in accordance with— (b)
Clause 8.5.4 of AS/NZS 3500.2 for stack vents; or (i)
Clause 8.5.3 of AS/NZS 3500.2 for relief vents. (ii)Each relief vent must interconnect with the stack vent at each floor. (c)
Applications
Water closets must be connected to a DN 80 or DN 100 discharge pipe. (1)
Water closets must not be connected to DN 80 where a C1V2 System 1 or C1V4 System 3 is used. (2)
Table C1V5a: Stack capacity without a relief vent
Table C1V5b: Stack capacity with a relief vent
C1D1 Deemed -to-Satisfy Pr ovisions
[2019: C1.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirement C1P1 to C1P7 is satisfied by complying
with C1D2 and C1D5 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
C1D2 Invert levels
[2019: C1.2]
The invert level of a trap or gully weir must be a minimum of 10 mm higher than the soffit of the pipe to which it connects.
Stack Nominal Diameter (DN) Capacity with square or 88° junction,
in litres per second (l/s)Capacity with sweep or 45° junction,
in litres per second (l/s)
65 0.5 0.7
80 2.0 2.5
100 4.0 5.2
150 9.5 12.4
Stack Nominal Diameter (DN) Capacity with square or 88° junction,
in litres per second (l/s)Capacity with sweep or 45° junction,
in litres per second (l/s)
65 0.7 0.9
80 2.6 3.4
100 5.6 7.3
150 12.4 18.3
Deemed -to-Satisfy ProvisionsC1V5
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 131SA C1D3
VIC C1D3
C1D3 General requirements
[2019: C1.3]
A sanitary plumbing system must be in accordance with AS/NZS 3500.2.
C1D4 Bushfire prone areas
[New for 2022]
A sanitary plumbing system in a designated bushfire prone area must be in accordance with AS 3959.
C1D5 Water efficiency
[New for 2022]
A sanitary plumbing system must ensure the efficient use of drinking water by—
limiting water usage from— (
a)
a cistern or flushing device for a urinal, to a flush volume of not more than 2.5 litres for each— (
i)
single urinal stall; or (
A)
600 mm length of a continuous urinal wall; and (
B)
a dual flush cistern or flushing valve that is connected to a water closet pan to a flush volume of not more (
ii)
than—
6 and 3 litres; or (
A)
4.5 and 3 litres; or (
B)
water saving measures equivalent to or greater than those described in (a). ( b)
Applications
The flush volumes of C1D5 may be within a tolerance of—
±0.5 litres for the full flush of a 6/3 litre cistern; or (
a)
+0.5 litres for the reduced flush of a 6/3 litre cistern; or (
b)
±0.2 litres for a 4.5/3 litre cistern. (
c)
Exemptions
The requirements of C1D5 do not apply to a vacuum drainage system.
Explanatory Information: Cross-volume considerations
NCC V
olumes One and Two deal with a number of areas of on-site construction which are relevant to sanitary plumbing
services. These include, but are not limited to, those listed in Table C1.
Table C1 : Cross-v olume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 StructureC1D2
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 132Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safety
Fixtures and fittings in a wet area F2 Wet areas and overflow
protection H4 Health and amenity
Service pipework external to the
building and penetrations through
roof cladding in a bushfire prone
areaG5 Construction in bushfire prone
areasH7 Ancillary provisions and
additional construction requirements
Flues, chimneys, pipes, gas storage,
domestic fuel tanks, cooling or
heating appliances or other servicesC4 Protection of openings H3 Fire safety
Pipework sound insulation F7 Sound transmission and
insulationH4 Health and amenityC1D5
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 133
Introduction to this Part
This Part sets out the requirements for any part of a sanitary drainage system of a property including from sanitary fixtures,
appliances and sanitary plumbing systems from the point of connection to an approved disposal system .
C2O1 Objective
[2019: CO2]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a sanitary drainage (a)
installation; and
ensure that a sanitary drainage installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
safeguard people from illness caused by the discharge of swimming pool waste water; and (f)
protect other property from damage caused by the discharge of swimming pool waste water; and (g)
ensure that a sanitary drainage installation is designed and is capable of being maintained so that throughout (h)
its serviceable life it will continue to satisfy Objectives (a) to (g).
C2F1 Disposal system
[2019: CF2.1]
Sanitary fixtures and sanitary appliances must be provided with an adequate disposal system that does not impact
adversely on occupants of the premises, property, the environment or the Network Utility Operator’s infrastructure.
C2F2 Swimming pool wastewater disposal
[2019: CF2.2]
Adequate means for the disposal of swimming pool water and drainage is to be provided for each swimming pool .
C2P1 Disposal
[2019: CP2.1]
A sanitary drainage system must ensure sewage is transferred from a sanitary plumbing system to an approved disposal
system .
Part C2 Sanitary drainage systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 134NT C2P2
C2P2 Swimming pool drainage
[2019: CP2.2]
A swimming pool must have adequate means of draining the pool in a manner that will not—
cause illness to people; or (a)
affect other property . (b)
C2P3 Access
[2019: CP2.1]
A sanitary drainage system must ensure there is access for maintenance and clearing a blockage .
C2P4 Ventilation
[2019: CP2.1]
(1) A sanitary drainage system must ensure there is adequate ventilation to avoid foul air and gases accumulating in the
sanitary drainage and sewerage system.
(2) A sanitary drainage system must ensure that ventilation is provided to avoid hydraulic load imbalance such that—
there is less than a 1% likelihood during the annual peak hour that when any fixture discharges, air pressure at (a)
any trap seal exceeds ±375 Pa difference from atmospheric pressure; or
an equivalent level of safety to human health is achieved as a system complying to (a). (b)
C2P5 Contamination
[2019:CP2.1]
(1) A sanitary drainage system must ensure protection against internal contamination.
(2) A sanitary drainage system must avoid the entry of water, foul air and gases from the system into buildings.
(3) A sanitary drainage system must avoid the entry of surface water , sub-surface water and stormwater into the system.
C2P6 Uncontrolled discharge
[2019: CP2.1]
A sanitary drainage system must avoid blockage and uncontrolled discharge .
C2P7 Damage
[2019: CP2.1]
(1) A sanitary drainage system must avoid damage from root penetration, superimposed loads or ground movement.
(2) A sanitary drainage system must avoid damage to existing buildings or siteworks .
(3) A sanitary drainage system must avoid damage to the Network Utility Operator’s sewerage system or other approved
disposal system .
Notes
There are no Deemed-to-Satisfy Provisions for sanitary drainage systems to address ground movement.
VIC C2P8 C2P1
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 135
C2V1 Velocity and liquid -to-air r atio
[2019: CV2.1]
Compliance with C2P1 is achieved if the sanitary drainage system is designed to operate with—
a liquid-to-air ratio of between 1 to 1 and 0.65 to 0.35; and (a)
a minimum velocity of 0.8 m/s; and (b)
a maximum velocity of— (c)
2 m/s under normal operating conditions; and (i)
3.5 m/s under surge conditions. (ii)
Explanatory Information
The purpose of the minimum velocity is to minimise the likelihood of blockage in the sanitary drainage system. •
The maximum velocity is intended to minimise the likelihood of damage to the system. •
VIC C2V2
C2V2 Pressure testing
[2019: CV2.2]
Compliance with C2P1 is achieved if the sanitary drainage system passes one or more of the pressure tests set out in
Section 15
of AS/NZS 3500.2.C2V3 Determination of sanitary drainage wastewater flowrates
[New for 2022]
(1) Compliance with C2P1 for pipe sizing is verified for each sanitary drainage pipework section when the design flow
rate is not less than—
the probable simultaneous wastewater flow rate calculated in accordance with (2); or (a)
the Discharge Unit (DU) value of the highest fixture connected upstream of the pipework section as given by (b)
Table C2V3b , in litres per second, whichever is greater.
(2) For the purposes of (1)(a), for each pipework section, the design probable simultaneous wastewater flow rate must
be calculated in accordance with the following:
(3) In the equation shown at (2):
= the probable simultaneous wastewater flowrate for that pipework section (l/s). (a)
= the sum of any other wastewater flowrates such as pumped discharges (l/s). (b)
= the frequency factor given in Table C2V3a (dimensionless). (c)
= the sum of the discharge units as given in Table C2V3b connected upstream of that pipework section (d)
(dimensionless).
Explanatory Information
System types referred to in Table C2V3b are as follows:
System 1 - A sanitary drainage system where branch discharge pipes are designed with a filling degree of 50%. •Verification Methods
QTot alKDUQOt he r
QTotal
QOt he r
K
DUC2P7
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 136System 2 - A sanitary drainage system where branch discharge pipes are designed with a filling degree of 70%. •
System 3 - A sanitary drainage system where branch discharge pipes are designed with a filling degree of 100%. •
Systems 1 and 2 are similar to the fully vented modified system and System 3 is similar to the single stack system, •
as detailed in AS/NZS 3500.2.
Filling degree is defined as the ratio between the height of fluid in a pipe (h) and the diameter of the pipe (D), or •
h/D.
Table C2V3a: Frequency factors
Table C2V3b: Discharge units
C2D1 Deemed -to-Satisfy Pr ovisions
[2019: C2.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements C2P1 to C2P7 are satisfied by
complying with C2D2 to C2D5 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
C2D2 Invert levels
[2019: C2.2]
The invert level of a trap or gully weir must be a minimum of 10 mm higher than the soffit of the pipe to which it connects. Fixture usage NCC building class Frequency factor (K)
Intermittent use e.g. dwelling,
guesthouse or officeClass 1, Class 2, Class 3 or Class 4 0.5
Frequent use e.g. hospital, restaurant
or hotelClass 5, Class 6, Class 7, Class 8,
Class 9a or Class 9c0.7
Congested use e.g. open to the
general public, schoolClass 9b 1.0
Special use e.g. laboratory Not applicable 1.2
Fixture System 1 - Discharge Units
(DU)System 2 - Discharge Units
(DU)System 3 - Discharge Units
(DU)
Basin 0.5 0.3 0.3
Shower 0.6 0.4 0.4
Urinal 0.8 0.5 0.4
Bath 0.8 0.6 1.3
Kitchen sink 0.8 0.6 1.3
Water closet 2.0 1.8 1.2
Washing machine - Up to 6
kg0.8 0.6 0.6
Domestic dishwasher 0.8 0.6 0.2
Deemed -to-Satisfy ProvisionsC2V3
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 137 C2D3 Swimming pool drainage
[2019: C2.3]
Pumped discharge from a swimming pool must connect to the sanitary drainage system in accordance with AS/NZS
3500.2.
NSW C2D4
SA C2D4
VIC C2D4
C2D4 General requirements
[2019: C2.4]
A sanitary drainage system must be in accordance with AS/NZS 3500.2.
TAS C2D4(2)
C2D5 Bushfire prone areas
[New for 2022]
A sanitary drainage system in a designated bushfire prone area must be in accordance with AS 3959.
TAS C2D6
Explanatory Information: Cross -v olume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to a sanitary drainage
system. These include, but are not limited to, those listed in Table C2.
Table C2: Cross -v olume considerations
Item NCC Volume One Class 2 to 9
buildingsNCC Volume Two Class 1 and 10
buildings
Excavations for pipework adjacent
to a building and footingsB1 Structural provisions H1 Structure
Termite management for
attachments to buildings and
penetrations through a slabB1 Structural provisions H1 Structure
Penetrations for pipework through a
vapour barrierB1 Structural provisions H1 Structure
Pipework in timber bearers and
joists of solid timber or engineered
wood productsB1 Structural provisions H1 Structure
Fittings, fixtures and pipework
installations in steel framed
constructionB1 Structural provisions H1 Structure
Penetrations through a fire-resisting
wall or floorC1 Fire resistance Performance
Requirements and C4 Protection of
openingsH3 Fire safetyC2D3
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 138
NSW Part C3
Introduction to this Part
This Part sets out the requirements for any part of an on-site wastewater management system from the point of connection
of a sanitary drainage system up to and including the appropriate means of waste disposal.
C3O1 Objective
[New for 2022]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of an on-site (a)
wastewater management system installation; and
ensure that an on-site wastewater management system installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that an on-site wastewater management system installation is designed and is capable of being (f)
maintained so that throughout its serviceable life it will continue to satisfy Objectives (a) to (e).
C3F1 On-sit e wastewater management
[New for 2022]
On-site wastewater management systems must collect, contain, treat, assimilate and process wastewater, human
excreta, or both so that public health and environmental standards required by the authority having jurisdiction are
achieved.
C3P1 Health impacts
[New for 2022]
VIC C3P1(1)
On-site wastewater management systems must protect public health by ensuring that—
risks associated with the discharge of treated wastewater and/or the end product from a composting toilet to the (a)
environment are minimised; and
foul air and gasses are prevented from accumulating within or entering into buildings; and (b)
the likelihood of contamination of the drinking water supply is avoided. (c)
Part C3 On-site wastewater management
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 139Explanatory Information
Wastewater contains a range of pathogens that can cause illness in humans. A well designed, maintained, and operated
wastewater system improves sanitation and reduces the risk to public and environmental health. Poorly designed and
maintained wastewater systems can result in, contamination of drinking water and recreational water sources, including
those used for food production, as well as increased risks of direct wastewater contact by the public.
C3P2 Environmental impacts
[New for 2022]
On-site wastewater management systems must protect the environment by ensuring that—
surface water and ground water are not polluted: and ( a)
soil productivity is maintained or enhanced; and (
b)
the likelihood of contamination of soils, ground water and waterways is avoided. (
c)
C3P3 Community systems
[New for 2022]
On-site wastewater management systems must minimise the impacts on and maintain and enhance community amenity .
They must ensure that the on-site wastewater management system design and its implementation contribute to improving
and sustaining aesthetic values within individual properties and groups of properties.
C3P4 Discharge to a Network Utility Operator sewer
[New for 2022]
Where an on-site wastewater management system discharges to the point of connection of a Network Utility Operator’s
sewer system, the connection must comply with the Network Utility Operator requirements.
TAS C3P5
VIC C3P5
C3P5 General requirements
[New for 2022]
On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater must
be designed and constructed—
with required treatment and storage capacity for the volume and make up of waste and frequency of discharge ( a)
for disposal; and
with required size, strength and rigidity for the nature, flow rates, volume of wastes and/or waste products which ( b)
must be processed; and
using materials which are impervious both to the waste for which disposal is required and to water; and (
c)
to avoid the likelihood of surface water and stormwater entering the system. ( d)
VIC C3P6
C3P6 Land application systems
[New for 2022]
(1) On-site wastewater management systems and associated land application systems must—
complete the treatment, uptake and absorption of the final ef
fluent within the boundaries of the approved area; (
a)
andC3P1
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 140protect against internal contamination; and (b)
provide ventilation to avoid the likelihood of foul air and gases from accumulating in the system. (c)
(2) On-site wastewater management systems and associated land application systems must—
avoid the likelihood of the creation of unpleasant odours or the accumulation of offensive matter; and (a)
avoid the likelihood of stormwater run-off entering the system; and (b)
avoid the likelihood of root penetration or ingress of ground water entering the system; and (c)
avoid the likelihood of unintended or uncontrolled discharge ; and (d)
avoid the likelihood of blockage and leakage; and (e)
avoid the likelihood of damage from superimposed loads or ground movement. (f)
VIC C3P7
C3P7 Access for maintenance
[New for 2022]
(1) On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater
must—
provide vehicle access for collection, if necessary; and (a)
avoid the likelihood of unauthorised access by people; and (b)
permit cleaning, maintenance, measurement and performance sampling. (c)
(2) Land application systems must—
provide access, as required, for maintenance; and (a)
incorporate provisions, as required, for effective cleaning. (b)
C3P8 Uncontrolled discharge
[New for 2022]
On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater must
avoid blockage or uncontrolled discharge .
C3P9 Identification
[New for 2022]
On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater must
permit the manufacturer model, serial number and designed capacity to be easily accessed and identifiable after
installation.
C3D1 Deemed -to-Satisfy Pr ovisions
[New for 2022]
(1) Performance Requirements C3P1 to C3P9 are satisfied by complying with C3D2 to C3D7 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
Deemed -to-Satisfy ProvisionsC3P6
(1 May 2023)
Sanitary plumbing and drainage systems
NCC 2022 Volume Three - Plumbing Code of Australia Page 141SA C3D2
C3D2 Septic tanks
[New for 2022]
A septic tank must be in accordance with AS/NZS 1546.1.
SA C3D3
C3D3 Composting toilets
[New for 2022]
A waterless composting toilet must be in accordance with AS/NZS 1546.2.
SA C3D4
C3D4 Secondary treatment systems
[New for 2022]
A secondary treatment system must be in accordance with AS 1546.3.
SA C3D5
C3D5 Domestic grey water treatment systems
[New for 2022]
A domestic grey water treatment system must be in accordance with AS/NZS 1546.4.
SA C3D6
TAS C3D6
C3D6 Land application systems
[New for 2022]
A domestic land application system must be in accordance with AS/NZS 1547.
SA C3D7
C3D7 Common effluent drainage systems
[New for 2022]
A common effluent drainage system must be in accordance with AS/NZS 3500.2.C3D1
(1 May 2023)
Excessive noise
NCC 2022 Volume Three - Plumbing Code of Australia Page 142
Section D Excessive noise
Part D1 Excessive noise
Objectives
D1O1 Objective
Functional Statements
D1F1 Excessive noise
Performance Requirements
D1P1 Undue noise
D1P2 Excessive noise
Deemed-to-Satisfy Provisions
D1D1 Deemed -to -Satisfy Provisions
D1D2 Undue noise
D1D3 Sound insulation
(1 May 2023)
Excessive noise
NCC 2022 Volume Three - Plumbing Code of Australia Page 143
Introduction to this Part
This Part sets out the requirements to prevent excessive noise being generated from a plumbing and drainage system
that could cause illness or loss of amenity to occupants in a building.
D1O1 Objective
[2019: DO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to excessive noise of a plumbing (a)
and drainage system; and
ensure that a plumbing and drainage system installation throughout its serviceable life will continue to satisfy (b)
the requirements of Objective (a).
D1F1 Excessive noise
[2019: DF1]
VIC D1F1(1)
A plumbing and drainage system must operate in a way that avoids the likelihood of excessive noise of any part of the
plumbing and drainage system, and minimises any adverse impact on building occupants.
D1P1 Undue noise
[2019: DP1.1]
A plumbing and drainage system must not create undue noise.
D1P2 Excessive noise
[2019: DP1.2]
(1) A plumbing and drainage system must reduce the transmission of airborne and/or impact generated sound which
may cause illness or loss of amenity to occupants.
(2) The required sound insulation of a floor or wall must not be compromised by the incorporation or penetration of a
plumbing or drainage system.
Applications
D1P2 only applies to a plumbing or drainage system that is located in—
a separating wall of a Class 1 building; or (a)
a Class 2 , Class 3 or Class 9c building that is required to be sound rated. (b)Part D1 Excessive noise
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Excessive noise
NCC 2022 Volume Three - Plumbing Code of Australia Page 144Notes
Part F7 in V
olume One of the NCC contains Performance Requirements F7P1 through to F7P4 which cover sound ( 1)
transmission and insulation in walls and floors of Class 2 , Class 3 and Class 9c buildings.
Part H4 in V
olume Two of the NCC contains Performance Requirement H4P6 which covers sound insulation of ( 2)
walls in Class 1 buildings.
D1D1 Deemed-to -Satisfy Pro visions
[2019: D1.1]
NT D1D1(1)
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirement —
D1P1 is satisfied by complying with D1D2 ; and ( a)
D1P2 is satisfied by complying with D1D3 . ( b)
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable.
D1D2 Undue noise
[2019: D1.2]
VIC D1D2(1)
To prevent undue noise, plumbing and drainage systems must comply with—
B1D3 for cold water services. ( a)
B2D9 for heated water services. ( b)
B3D3 for non-drinking water services. ( c)
B4D2 for fire-fighting water services. ( d)
B6D2 for rainwater services . ( e)
C1D3 for sanitary plumbing systems. ( f)
C2D4 for sanitary drainage systems. ( g)
NT D1D3
D1D3 Sound insulation
[2019: D1.3]
(1) If a plumbing or drainage system serves or passes through more than one sole-occupancy unit in a Class 2 , Class 3
or Class 9c building, it must be separated from the rooms of any other sole-occupancy unit by construction with an
Rw + Ctr (airborne) not less than—
40 if the adjacent room is a habitable room (other than a kitchen); or ( a)
25 if the adjacent room is a kitchen or a non- habitable room . ( b)
(2) In Class 2 , Class 3 or Class 9c buildings, a flexible coupling must be used to connect a pump to a plumbing or
drainage system.
(3) If a plumbing or drainage system is located in (or passes through) a separating wall in a Class 1 building, it must—
only be installed in discontinuous construction ; and ( a)
not be fixed to the wall of a dwelling that it does not serve; and (
b)
have a gap not less than 10 mm between the pipe and a wall of a dwelling that it does not serve; and (
c)Deemed -to-Satisfy ProvisionsD1P2
(1 May 2023)
Excessive noise
NCC 2022 Volume Three - Plumbing Code of Australia Page 145not be chased in if the separating wall is made of concrete or masonry. (d)
Explanatory Information
Specification 28 lists sound ratings for some common forms of construction. If any of these common forms of
construction are used, the plumbing or drainage system must be installed in accordance with the requirements of that
Specification. D1D3
(1 May 2023)
Facilities and ancillary additions
NCC 2022 Volume Three - Plumbing Code of Australia Page 146
Section E Facilities and ancillary additions
Part E1 Facilities
Objectives
E1O1 Objective
Functional Statements
E1F1 Facilities
Performance Requirements
E1P1 Facilities for people with disability
Deemed-to-Satisfy Provisions
E1D1 Deemed -to -Satisfy Provisions
E1D2 General requirements
(1 May 2023)
Facilities and ancillary additions
NCC 2022 Volume Three - Plumbing Code of Australia Page 147
Introduction to this Part
This Part sets out the requirements to allow people with disability to use the facilities provided by a plumbing and drainage
system.
E1O1 Objective
[2019: EO1]
The Objective of this Part is to—
ensure that the facility of a plumbing and drainage system (including an installation provided for use by people (a)
with disability) is suitable; and
ensure that the facility of a plumbing and drainage system installation throughout its serviceable life will continue (b)
to satisfy the requirements of Objective (a).
E1F1 Facilities
[2019: EF1]
The facility of a plumbing and drainage system must be designed and installed so as to be operable by people with
disability.
E1P1 Facilities for people with disability
[2019: EP1.1]
Where a plumbing and drainage system is provided, supply taps or other operational controls must be accessible and
suitable for use.
E1D1 Deemed -to-Satisfy Pr ovisions
[2019: E1.1]
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirement E1P1 is satisfied by complying with
E1D2 .
(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in
accordance with A2G2(3) and A2G4(3) as applicable. Part E1 Facilities
Objectives
Functional Statements
Performance Requirements
Deemed -to-Satisfy Provisions
(1 May 2023)
Facilities and ancillary additions
NCC 2022 Volume Three - Plumbing Code of Australia Page 148 E1D2 General requirements
[2019: E1.2]
Where supply taps or other operational controls are provided in sanitary facilities for people with disability they must be in
accordance with—
AS 1428.1 (2001) and AS 1428.2 for passenger use areas of Class 9b and Class 10 public transport buildings; (a)
and
AS 1428.1 (2009) for all other buildings. (b)
Explanatory Information: Cross -v olume considerations
Part F4 of NCC Volume One sets out the requirements for the design and construction of accessible sanitary facilities
in Class 1b, 2 to 9 and 10a buildings. E1D2
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 149
Schedule 1 Definitions
Abbreviations
Symbols
Glossary
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 150
Abbreviation Definitions
ABCB Australian Building Codes Board
AC Alternating Current
ACC Acrylic conformal coating
ACL Acrylic latex
ACP Aluminium Composite Panel
AIRAH Australian Institute of Refrigeration, Air conditioning and Heating
ANSI American National Standards Institute
AS Australian Standard
ASET Available Safe Egress Time
ASHRAE American Society of Heating, Refrigerating and Air Conditioning Engineers
ASTM American Society for Testing and Materials
BAL Bushfire Attack Level
BCA Building Code of Australia
BE Fire blocks evacuation route
CAN National Standard of Canada
CCT Correlated Colour Temperature
CF Challenging fire
CHF Critical Heat Flux
CIBSE Chartered Institution of Building Services Engineers
CRF Critical Radiant Flux
CRI Colour Rendering Index
CS Fire starts in a concealed space
CSHGCConstant for solar heat gain
CSIRO Commonwealth Scientific and Industrial Research Organisation
CUConstant for conductance
DC Direct Current
FED Fractional Effective Dose
FI Fire brigade intervention
FRL Fire Resistance Level
FZ Flame Zone
GEMS Greenhouse and Energy Minimum Standards
GRP Glass fibre reinforced polyester
HDG Hot dip galvanising
HRR Heat Release Rate
HS Horizontal fire spread
IS Rapid fire spread involving internal surface linings
ISO International Organisation for Standardisation
IZS Inorganic zinc silicate
LED Light-Emitting Diode
MEPS Minimum Energy Performance StandardsAbbreviations
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 151Abbreviation Definitions
NABERS National Australian Built Environment Rating System
NASH National Association of Steel-Framed Housing
NATA National Association of Testing Authorities Australia
NatHERS Nationwide House Energy Rating Scheme
NCC National Construction Code
NSF National Sanitation Foundation
PBDB Performance-based design brief
PCA Plumbing Code of Australia
PMV Predicted Mean Vote
ppm parts per million
PUR Polyurethane
PVC Polyvinyl chloride
RC Robustness check
RSET Required Safe Egress Time
RWWeighted sound reduction index
SF Smouldering fire
SHGC Solar Heat Gain Coefficient
SL Square mesh
SS Structural stability and other property
STC Sound Transmission Class
TM Trench mesh
UF Unexpected catastrophic failure
UPVC Unplasticized polyvinyl chloride
UT Fire in normally unoccupied room threatening occupants of other rooms
U-Value Thermal transmittance
VS Vertical fire spread involving external cladding or external openings
WC Water closet
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 152
Symbols Definitions
° degree(s)
°C degree(s) Celsius
°CDB degree(s) Celsius Dry Bulb
°CWB degree(s) Celsius Wet Bulb
-e/MJ equivalent per Megajoule(s)
μm micrometre
µg/N.s Micrograms per newton-second
dB(A) decibels “A” scale weighting network
f’c Characteristic compressive strength of concrete at 28 days
f’y Yield stress used in design
G Permanent load
J Joule(s)
J/kg.K Joules per kilogram degree Kelvin
J/s.m2Joules per second square metre
K Kelvin(s)
kg kilogram(s)
kg/m kilogram(s) per metre
kg/m2kilogram(s) per square metre
kg/m3kilogram(s) per cubic metre
kJ/m2.hour kilojoules per square metre hour
km kilometre(s)
kPa kilopascal(s)
kW/m2kilowatt(s) per square metre
kWheatingkilowatt(s) of heating
kWr kilowatt(s) of refrigeration
L litre(s)
L/min litre(s) per minute
L/s litre(s) per second
L/s.m2litre(s) per second square metre
Lumens/W Lumens per Watt
lx lux
m metre(s)
m/s metre(s) per second
m2square metre(s)
m2.K/W square metre Kelvin(s) per Watt
m3cubic metre(s)
m3/hour cubic metre(s) per hour
m3/s cubic metre(s) per second
mcd/m2millicandelas per square metre
min minute(s)Symbols
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 153Symbols Definitions
MJ/hour Megajoules per hour
MJ/m2.annum Megajoules per square metre annum
mm millimetre(s)
mm2square millimetre(s)
MW megawatt(s)
N newton(s)
N/m Newton(s) per metre
Pa pascal(s)
Pa/m pascal(s) per metre
Q Imposed load
s second(s)
ULS Ultimate limit state
V Volt(s)
W Watt(s)
Winput powerWatts of input power
Wr/Winput powerWatts of thermal refrigeration per watt of input power
W/kWrejWatts per kilowatt of heat rejected
Wm-1K-1Watts per metre degree Kelvin
W/m2Watts per square metre
°south degree south
% percent
> greater than
< less than
≤ less than or equal to
≥ equal to or more than
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 154
Above ground rainwater tank: A rainwater tank that is not in any way set into the ground.
Accessible: Having features to enable use by people with a disability.
Accessway: A continuous accessible path of travel (as defined in AS 1428.1) to, into or within a building.
Accredited Testing Laboratory: One of the following:
An organisation accredited by the National Association of Testing Authorities Australia (NATA) to undertake the (a)
relevant tests.
An organisation outside Australia accredited to undertake the relevant tests by an authority recognised by NATA (b)
through a mutual recognition agreement.
An organisation recognised as being an Accredited Testing Laboratory under legislation at the time the test was (c)
undertaken.
Activity support level: The degree to which occupants can undertake activities with respect to the likely activity traits
and occupant traits .
Explanatory Information
This term is used to articulate whether the height of a room or space is sufficient and by what degree. This is achieved
by having regard to the room or space’s intended use by occupants, through consideration of the defined terms ‘ activity
traits ’ and ‘ occupant traits ’.
Activity traits: For the purposes of—
Volume One, the features of the activities that will be undertaken in a habitable room or space; or (a)
Volume Two, the features of the activities that will be undertaken in a room or space. (b)
Explanatory Information
This term is used to describe the characteristics of the activities that will be undertaken in a room or space.
For example, the activities likely to be undertaken in a bedroom, and the associated features are—
sleeping — a person laying horizontally; and •
resting — a person laying horizontally or sitting upright on the bed; and •
leisure activities, such as reading a book — a person sitting upright on the bed, with enough space to stretch •
their arms vertically; and
dressing/changing clothes — a person standing with enough space to stretch their arms vertically. •
Administering body: The body responsible for administering the WaterMark Certification Scheme .
Aged care building: A Class 9c building for residential accommodation of aged persons who, due to varying degrees of
incapacity associated with the ageing process, are provided with personal care services and 24 hour staff assistance
to evacuate the building during an emergency.
NSW Aisle
SA Agriculture
Air-conditioning: For the purposes of Section J of Volume One, a service that actively cools or heats the air within a
space, but does not include a service that directly—
cools or heats cold or hot rooms; or (a)
maintains specialised conditions for equipment or processes, where this is the main purpose of the service . (b)
Alarm zone: For the purposes of Specification 23, an area of a building protected by one or more smoke alarms connected
to one alarm circuit.
Alpine area: An area given in Figure 1 and in Table 1 for specific locations, and is—
likely to be subject to significant snowfalls; and (a)Glossary
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 155in New South Wales, the ACT or Victoria more than 1200 m above the Australian Height Datum; and (b)
in Tasmania more than 900 m above the Australian Height Datum. (c)
Table 1 : Alpine areas where snow loads are significant
Location Map identifier
Kiandra (NSW) 1
Mount Kosciuszko (NSW) 2
Perisher Valley (NSW) 3
Thredbo (NSW) 4
Cabramurra (NSW) 5
Charlotte Pass Village (NSW) 6
Diggers Creek (NSW) 7
Guthega Village (NSW) 8
Mount Blue Cow (NSW) 9
Mount Selwyn (NSW) 10
Perisher Range (NSW) 11
Rules Point (NSW) 12
Sawpit Creek (NSW) 13
Smiggin Holes (NSW) 14
Smiggin Range (NSW) 15
Three Mile Dam (NSW) 16
Wilsons Valley (NSW) 17
Falls Creek (Vic.), including Summit Area, Sun Valley and
Village Bowl18
Mount Baw Baw (Vic.) 19
Mount Buffalo (Vic.), including Chalet, Dingo Dell and
Tatra20
Mount Buller (Vic.), including Baldy and Village 21
Mount Hotham (Vic.), including Davenport and Village
Centre22
Dinner Plain (Vic.) 23
Lake Mountain (Vic.) 24
Mount Stirling (Vic.) 25
Ben Lomond Ski Field (Tas.) 26
Cradle Valley (Tas.) 27
Great Lake Area (Tas.) 28
Mount Field Ski Field (Tas.) 29
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 156 Figure 1 : Alpine areas
Figure Notes
This map is approximate only and altitude above Australian Height Datum must be used to determine whether the building
falls into an alpine area region.
Explanatory Information
Alpine areas are located in New South Wales, Victoria and Tasmania.
Alpine areas are areas 1200 m or more above Australian Height Datum (AHD) for New South Wales, Australian Capital
Territory and Victoria, and 900 m or more above AHD for Tasmania, as shown in Figure 1.
Alpine areas are considered to receive significant snowfalls (snowfalls that result in an average snow accumulation on Northern Tableland
Central Tableland
Sydney32º
34º
36º
38º150º 148º148º144º
142º40º
42ºMelbourne21
24
1925222023185161
6
210
12
89
41711 151413Southern Tableland73
Alpine >1200 m (NSW, ACT
and Vic), >900 m (Tas)
2728
26
29
HobartLEGEND:
Alpine
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 157the ground of 175 mm or greater). Regions in New South Wales, the Australian Capital Territory and Victoria between
600 – 1200 m AHD are considered to be sub-alpine areas and may receive significant snowfalls, however unlike alpine
areas the snow is unlikely to accumulate.
It is recommended that the appropriate authority be consulted to determine whether the building is located in an alpine
area. AS/NZS 1170.3 also contains further detail in the identification of alpine areas and the altitude of the alpine regions
of Australia.
In the Australian Capital Territory, Canberra is not designated as an alpine area as snow loads are not considered
significant.
Alteration: In relation to a building, includes an addition or extension to a building.
Aluminium Composite Panel (ACP): Flat or profiled aluminium sheet material in composite with any type of materials.
Amenity: An attribute which contributes to the health, physical independence, comfort and well-being of people.
Ancillary element: An element that is secondary to and not an integral part of another element to which it is attached.
Annual exceedance probability: The probability that a given rainfall total accumulated over a given duration will be
exceeded in any one year.
Annual greenhouse gas emissions: The theoretical amount of greenhouse gas emissions attributable to the energy
used annually by a building’s services , excluding kitchen exhaust and the like.
Appropriate authority: For the purposes of the Fire Safety Verification Method, means the relevant authority with the
statutory responsibility to determine the particular matter satisfies the relevant Performance Requirement .
Explanatory Information
The Appropriate Authority is typically the building surveyor or building certifier charged with the statutory responsibility
to determine building compliance and issue the building permit / approval and occupancy certificate / approval.
NSW Appropriate authority
Appropriate authority: The relevant authority with the statutory responsibility to determine the particular matter.
Appropriately qualified person: A person recognised by the appropriate authority as having qualifications and/or
experience in the relevant discipline in question.
Approved disposal system: A system for the disposal of sewage, sullage or stormwater approved by an authority having
jurisdiction.
Articulated masonry: Masonry construction in which special provisions have been made for movement by articulation.
NSW Assembly building
SA Assembly building
Assembly building: A building where people may assemble for—
civic, theatrical, social, political or religious purposes including a library, theatre, public hall or place of worship; (
a)
or
educational purposes in a school , early childhood centre , preschool, or the like; or ( b)
entertainment, recreational or sporting purposes including— (
c)
a discotheque, nightclub or a bar area of a hotel or motel providing live entertainment or containing a dance (
i)
floor; or
a cinema; or (
ii)
a sports stadium, sporting or other club; or (
iii)
transit purposes including a bus station, railway station, airport or ferry terminal. (
d)
Assessment Method: A method that can be used for determining that a Performance Solution or Deemed-to-Satisfy
Solution complies with the Performance Requirements .
Assumed cooling thermostat set point: The cooling thermostat set point used to calculate cooling degree hours , and
equal to , where is the mean January outdoor air temperature measured in degrees Celsius.
Atrium: A space within a building that connects 2 or more storeys and— 178031Tm Tm
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 158is enclosed at the top by a floor or roof (including a glazed roof structure); and ( a)
includes any adjacent part of the building not separated by an appropriate barrier to fire; but (
b)
does not include a stairwell, rampwell or the space within a shaft ; and ( c)
for the purposes of (a) a space is considered enclosed if the area of the enclosing floor or roof is greater than (
d)
50% of the area of the space, measured in plan, of any of the storeys connected by the space.
Atrium well:
A space in an atrium bounded by the perimeter of the openings in the floors or by the perimeter of the floors
and the external walls .
NSW Auditorium
Automatic: Designed to operate when activated by a heat, smoke or fire sensing device.
Available safe egress time (ASET)
The time between ignition of a fire and the onset of untenable conditions in a specific part of a building. (
1)
The time referred to in (1) is the calculated interval between the time of ignition of a fire and the time at which (
2)
conditions become such that the occupant is unable to take effective action to escape to a place of safety.
A
verage daylight factor: The ratio of the illumination level within a room provided by daylight to the level of daylight
outside the building during overcast conditions.
Average specific extinction area: The average specific extinction area for smoke as determined by AS 5637.1.
Backflow prevention device: An air gap, break tank or mechanical device that is designed to prevent the unplanned
reversal of flow of water or contaminants into the water service or a Network Utility Operator’s water supply.
Backpressure: A reversal of water flow caused by the downstream pressure becoming greater than the supply pressure.
Backsiphonage: A reversal of flow of water caused by negative pressure in the distributing pipes of a water service or
supply.
Backstage: A space associated with, and adjacent to, a stage in a Class 9b building for scenery, props, equipment,
dressing rooms, or the like.
Battery system: One or more chemical cells connected in series, parallel or a combination of the two for the purpose of
electrical energy storage.
Blockage: An obstruction within a water service or sanitary plumbing or drainage system.
Boiler: A vessel or an arrangement of vessels and interconnecting parts, wherein steam or other vapour is generated, or
water or other liquid is heated at a pressure above that of the atmosphere, by the application of fire, the products of
combustion, electrical power, or similar high temperature means, and—
includes superheaters, reheaters, economisers, boiler piping, supports, mountings, valves, gauges, fittings, (
a)
controls, the boiler settings and directly associated equipment; but
excludes a fully flooded or pressurised system where water or other liquid is heated to a temperature lower than (
b)
the normal atmospheric boiling temperature of the liquid.
Bond breaker:
A material used as part of a waterproofing system that prevents the membrane bonding to the substrate,
bedding or lining.
Breaking surf: Any area of salt water in which waves break on an average of at least 4 days per week but does not
include white caps or choppy water.
Explanatory Information
Breaking surf normally occurs in areas exposed to the open sea. Breaking surf does not normally occur in sheltered
areas, such as that which occurs around Port Phillip Bay, Sydney Harbour, Swan River, Derwent River and similar
locations.
Building complexity criteria: Are used to determine the building complexity level of all or part of a building in accordance
with Table 2 , where building complexity criteria are as follows:
Attributes — the building is designed or constructed with any of the following sub-criteria: (
a)
An effective height of more than 25 m. ( i)
One or more Performance Solutions are used to demonstrate compliance with the Performance (ii)
Requirements relating to material and systems for structural safety.
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 159One or more Performance Solutions are used to demonstrate compliance with the Performance (iii)
Requirements relating to material and systems for fire safety.
Is located in an area prone to natural disaster or adverse environmental conditions. (
iv)
Class 2 — all or part of the building is Class 2 of three or more storeys . ( b)
Occupant numbers — the building is to be occupied by more than 100 people determined in accordance with (
c)
D2D18.
Occupant characteristics — the building is to be occupied by more than 10 people who will require assistance (
d)
to evacuate the building in an emergency.
Importance Level — the building is determined to be Importance Level 4 or 5. (
e)
Notes
The NCC currently does not include corresponding technical requirements relating to the defined term ‘building
complexity criteria’ and the various building complexity levels. It is intended that these terms will be integrated into future
editions of the NCC.
Table 2: Building complexity level
Buried rainwater tank:
A rainwater tank that is set into and completely covered by earth.
Burnout: Exposure to fire for a time that includes fire growth , full development, and decay in the absence of intervention
or automatic suppression, beyond which the fire is no longer a threat to building elements intended to perform
loadbearing or fire separation functions, or both.
SA Brush fence
SA Bulk grain storage facility
Carpark: A building that is used for the parking of motor vehicles but is neither a private garage nor used for the servicing
of vehicles, other than washing, cleaning or polishing.
Cavity: A void between 2 leaves of masonry, or in masonry veneer construction, a void between a leaf of masonry and
the supporting frame.
Cavity wall: For the purposes of F3V1 and H2V1, a wall that incorporates a drained cavity.
SA Cell type silo
TAS Centre-based care class 4 facility
TAS Centre-based care class 5 facility
Certificate of Accreditation: A certificate issued by a State or Territory accreditation authority stating that the properties
and performance of a building material or method of construction or design fulfil specific requirements of the NCC.
Certificate of Conformity: A certificate issued under the ABCB scheme for products and systems certification stating
that the properties and performance of a building material or method of construction or design fulfil specific
requirements of the NCC.
Certification body: A person or organisation operating in the field of material, product, form of construction or design Building complexity level Criteria
Low The building meets only one of the following building
complexity criteria : (a) (Attributes), (b) (Class 2), (c)
(Occupant numbers) or (d) (Occupant characteristics)
Medium The building meets two of the following building
complexity criteria : (a) (Attributes), (b) (Class 2), (c)
(Occupant numbers) or (d) (Occupant characteristics)
High The building meets three of the following building
complexity criteria : (a) (Attributes), (b) (Class 2), (c)
(Occupant numbers) or (d) (Occupant characteristics)
Very high The building meets all of the following building complexity
criteria : (a) (Attributes), (b) (Class 2), (c) (Occupant
numbers) and (d) (Occupant characteristics); or (e)
(Building Importance Level 4 or 5)
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 160certification that has been accredited by the Joint Accreditation System of Australia and New Zealand (JAS-ANZ),
and is accredited for a purpose other than as part of the CodeMark Australia Certification Scheme or WaterMark
Certification Scheme .
Characteristic: The occupant data to be used in the modelling of access solutions which define how an occupant interacts
with a building, i.e. occupant movement speeds, turning ability, reach capability, perception of luminance contrast
and hearing threshold.
VIC Children’s service
Clad frame: Timber or metal frame construction with exterior timber or sheet wall cladding that is not sensitive to minor
movement and includes substructure masonry walls up to 1.5 m high.
Climate zone: An area defined in Figure 2 and in Table 3 for specific locations, having energy efficiency provisions based
on a range of similar climatic characteristics.
Table 3 : Climate zones for thermal design
State Location Climate zone
ACT Canberra 7
NSW Albury 4
NSW Armidale 7
NSW Batemans Bay 6
NSW Bathurst 7
NSW Bega 6
NSW Bellingen Shire - Dorrigo Plateau 7
NSW Bellingen Shire - Valley & seaboard 2
NSW Bourke 4
NSW Broken Hill 4
NSW Byron Bay 2
NSW Cobar 4
NSW Coffs Harbour 2
NSW Dubbo 4
NSW Goulburn 7
NSW Grafton 2
NSW Griffith 4
NSW Ivanhoe 4
NSW Lismore 2
NSW Lord Howe Island 2
NSW Moree 4
NSW Newcastle 5
NSW Nowra 6
NSW Orange 7
NSW Perisher - Smiggins 8
NSW Port Macquarie 5
NSW Sydney East 5
NSW Sydney West 6
NSW Tamworth 4
NSW Thredbo 8
NSW Wagga Wagga 4
NSW Williamtown 5
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 161State Location Climate zone
NSW Wollongong 5
NSW Yass 6
NT Alice Springs 3
NT Darwin 1
NT Elliot 3
NT Katherine 1
NT Renner Springs 3
NT Tennant Creek 3
QLD Birdsville 3
QLD Brisbane 2
QLD Bundaberg 2
QLD Cairns 1
QLD Cooktown 1
QLD Cunnamulla 3
QLD Gladstone 2
QLD Hervey Bay 2
QLD Hughenden 3
QLD Longreach 3
QLD Mackay 2
QLD Mount Isa 3
QLD Normanton 1
QLD Rockhampton 2
QLD Roma 3
QLD Southport 2
QLD Toowoomba 5
QLD Townsville 1
QLD Warwick 5
QLD Weipa 1
SA Adelaide 5
SA Bordertown 6
SA Ceduna 5
SA Cook 4
SA Elliston 5
SA Kingscote 6
SA Leigh Creek 5
SA Lobethal 6
SA Loxton 5
SA Naracoorte 6
SA Marree 4
SA Mount Gambier 6
SA Murray Bridge 6
SA Oodnadatta 4
SA Port Augusta 4
SA Port Lincoln 5
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 162State Location Climate zone
SA Renmark 5
SA Tarcoola 4
SA Victor Harbour 6
SA Whyalla 4
TAS Burnie 7
TAS Bicheno 7
TAS Deloraine 7
TAS Devonport 7
TAS Flinders Island 7
TAS Hobart 7
TAS Huonville 7
TAS King Island 7
TAS Launceston 7
TAS New Norfolk 7
TAS Oatlands 7
TAS Orford 7
TAS Rossarden 7
TAS Smithton 7
TAS St Marys 7
TAS Zeehan 7
VIC Anglesea 6
VIC Ararat 7
VIC Bairnsdale 6
VIC Ballarat 7
VIC Benalla 6
VIC Bendigo 6
VIC Bright 7
VIC Colac 6
VIC Dandenong 6
VIC Echuca 4
VIC Geelong 6
VIC Hamilton 7
VIC Horsham 6
VIC Melbourne 6
VIC Mildura 4
VIC Portland 6
VIC Sale 6
VIC Shepparton 4
VIC Swan Hill 4
VIC Traralgon 6
VIC Wangaratta 7
VIC Warrnambool 6
VIC Wodonga 6
WA Albany 6
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 163
Figure 2: Climate zones for thermal design
Figure Notes
This map can be viewed in enlargeable form on the ABCB website at abcb.gov.au . (1)
A Zone 4 area in South Australia, other than a council area, at an altitude greater than 300 m above the (2)State Location Climate zone
WA Balladonia 4
WA Broome 1
WA Bunbury 5
WA Carnarvon 3
WA Christmas Island 1
WA Cocos Island 1
WA Derby 1
WA Esperance 5
WA Exmouth 1
WA Geraldton 5
WA Halls Creek 3
WA Kalgoorlie-Boulder 4
WA Karratha 1
WA Meekatharra 4
WA Northam 4
WA Pemberton 6
WA Perth 5
WA Port Hedland 1
WA Wagin 4
WA Wyndham 1
Lord Howe Island
SydneyBrisbaneDarwin
Perth
Adelaide
Canberra
HobartMelbourneWollongongNewcastle
Launceston
Swansea
SouthportDevonport
StrahanAlice Springs
Whyalla
Burra
Renmark
Mount GambierBunbury
Margaret RiverYalgoo
Merredin
NewdegateEuclaW arbur ton
Wiluna
Kalgoorlie–BoulderGeraldton
Mildura
Horsham
Lakes EntranceBallaratBroken Hill
Albury–Wodonga
SheppartonPort Macquarie
DubboMount IsaTownsville
Mackay
Rockhampton
Maryborough
Bourke
Ivanhoe
GriffithBathurstCoffs HarbourCoober Pedy
Leigh Creek
NullarborWyndham
BroomeDerby
NewmanTelfer
NorsemanPort Hedland
CarnarvonExmouthDampier
Gascoyne
Junction
Esperance
AlbanyCeduna
Port Lincoln
Kingscote
Kingston SEKatherine
Tennant CreekCairnsCooktown
GoondiwindiTaroomLongreach
CharlevilleBirdsvilleBurketown
Thargomindah
TibooburraTimber Creek
Borroloola
Elliot
Yulara
Amata
Oodnadatta
InnaminckaKulgeraOenpelliNhulunbuy
Zone 1
Zone 2
Zone 3
Zone 4Zone 5
Zone 6
Zone 7
Zone 8
Local Government Area boundary
Developed from a map produced
by the Bureau of Meteorology
VC00031.340°
145°145°
140°140°
135°135°
130°130°
125°125°
120°120°
115°115°
110°110°
105° 150°150°
155°155°
160°160°
165°40°35°35°30°30°25°25°20°20°15°15°10°10°
Last amended: August 2015Halls Creek
Climate Zones
www.abcb.gov.auTamworthWeipa
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 164Australian Height Datum is to be considered as Zone 5.
The areas referred to in (2) have been defined in an enlarged format on the following maps produced by the (3)
Department of Planning, Transport and Infrastructure (these maps can be viewed on the Government of South
Australia website at www.sa.gov.au ):
Adelaide Hills Climate Zone Map. (a)
Barossa Council Climate Zone Map. (b)
Regional Council of Goyder Climate Zone Map. (c)
Locations in climate zone 8 are in alpine areas . (4)
Combustible: Applied to—
a material — means combustible as determined by AS 1530.1; and (a)
construction or part of a building — means constructed wholly or in part of combustible materials. (b)
VIC Combustible cladding product
Common wall: For the purposes of—
Volume One, a wall that is common to adjoining buildings. (a)
Volume Two and the ABCB Housing Provisions, a wall that is common to adjoining buildings other than Class 1 (b)
buildings.
Condensation: The formation of moisture on the surface of a building element or material as a result of moist air coming
into contact with a surface which is at a lower temperature.
Conditioned space: For the purposes of—
Volume One, a space within a building, including a ceiling or under-floor supply air plenum or return air plenum, (a)
where the environment is likely, by the intended use of the space, to have its temperature controlled by air-
conditioning ; or
Volume Two, a space within a building that is heated or cooled by the building’s domestic services , excluding a (b)
non-habitable room in which a heater with a capacity of not more than 1.2 kW or 4.3 MJ/hour is installed.
Construction activity actions: Actions due to stacking of building materials or the use of equipment, including cranes
and trucks, during construction or actions which may be induced by floor to floor propping.
Containment protection: The installation of a backflow prevention device at the point of connection of a Network Utility
Operator’s water supply to a site.
Contaminant: Any substance (including gases, liquids, solids or micro-organisms), energy (excluding noise) or heat, that
either by itself or in combination with the same, similar or other substances, energy or heat, changes or is likely to
change the physical, chemical or biological condition of water.
NSW Continental seating
Controlled fill: Material that has been placed and compacted in layers with compaction equipment (such as a vibrating
plate) within a defined moisture range to a defined density requirement.
Cooling degree hours: For any one hour when the mean outdoor air temperature is above the assumed cooling
thermostat set point , the degree Celsius air temperature difference between the mean outdoor air temperature and
the assumed cooling thermostat set point .
Cooling load: The calculated amount of energy removed from the cooled spaces of the building annually by artificial
means to maintain the desired temperatures in those spaces.
Critical radiant flux (CRF): The critical heat flux at extinguishment (CHF in kW/m2) as determined by AS ISO 9239.1.
Cross-connection: Any actual or potential connection between a water supply and any contaminant .
NSW Cross-over
Curtain wall: A non- loadbearing external wall that is not a panel wall .
Daily outdoor temperature range: The difference between the maximum and minimum temperatures that occur in a
day.
Damp-proof course (DPC): A continuous layer of impervious material placed in a masonry wall or pier, or between a wall
or pier and a floor, to prevent the upward or downward migration of water.
Deemed-to-Satisfy Provisions: Provisions which are deemed to satisfy the Performance Requirements .
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 165Deemed-to-Satisfy Solution: A method of satisfying the Deemed-to-Satisfy Provisions .
Defined flood event (DFE): The flood event selected for the management of flood hazard for the location of specific
development as determined by the appropriate authority .
Defined flood level (DFL): The flood level associated with a defined flood event relative to a specified datum (see Figure
3).
Figure 3: Identification of defined flood level, flood hazard level and freeboard
Dehumidification gram hours:
For any one hour when the mean humidity is more than 15.7g/kg, the grams per kilogram
of absolute humidity difference between the mean outdoor absolute humidity and 15.7g/kg.
NSW Designated bushfire prone area
Designated bushfire prone area: Land which has been designated under a power of legislation as being subject, or
likely to be subject, to bushfires.
Design bushfire: The characteristics of a bushfire, its initiation, spread and development, which arises from weather
conditions, topography and fuel (vegetation) in a given setting, used to determine fire actions .
Design fire: The quantitative description of a representation of a fire within the design scenario .
Design scenario: The specific scenario of which the sequence of events is quantified and a fire safety engineering analysis
is conducted against.
WA Design wind speed
Design wind speed: The design gust wind speed for the area where the building is located, calculated in accordance
with AS/NZS 1170.2 or AS 4055 (see Table 4 for wind classes). Habitable floor area
Non-habitable floor areaHabitable floor level
Non-habitable floor levelFlood
hazard level
Definedflood levelFreeboard
Not more
than 1.0 m
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 166 Table 4 : Wind classes
Table Notes
Wind classification map identifying wind regions is contained in ABCB Housing Provisions Part 2.2 (see Figure (1)
2.2.3).
Information on wind classes for particular areas may be available from the appropriate authority . (2)
“N” = non-cyclonic winds and “C” = cyclonic winds. (3)
Detention centre: A building in which persons are securely detained by means of the built structure including a prison,
remand centre, juvenile detention centre, holding cells or psychiatric detention centre.
NSW Development consent
Direct fix cladding wall: For the purposes of F3V1 and H2V1, means a wall with cladding attached directly to the wall
framing without the use of a drained cavity.
Discontinuous construction: Means—
a wall having a minimum 20 mm cavity between 2 separate leaves, and— (a)
for masonry, where wall ties are used to connect leaves, the ties are of the resilient type; and (i)
for other than masonry, there is no mechanical linkage between the leaves, except at the periphery; and (ii)
a staggered stud wall is not deemed to be discontinuous construction. (b)
Display glazing: Glazing used to display retail goods in a shop or showroom directly adjacent to a walkway or footpath,
but not including that used in a café or restaurant.
Domestic services: The basic engineering systems that use energy or control the use of energy; and—
includes— (a)
heating, air-conditioning , mechanical ventilation and artificial lighting; and (i)
pumps and heaters for swimming pools and spa pools; and (ii)
heated water systems; and (iii)
on-site renewable energy equipment; but (iv)
excludes cooking facilities and portable appliances. (b)
Drainage: Any part of—
a sanitary drainage system, including any liquid trade waste drainage; or (a)
a stormwater drainage system. (b)
Drainage flange: A flange connected to a waste pipe, at the point at which it passes through the floor substrate, to prevent
leakage and which enables tile bed drainage into the waste pipe.
Drainage riser: A waste pipe between the floor waste and the drainage system.
Drinking water: Water intended primarily for human consumption but which has other domestic uses.
Explanatory Information
See also the Australian Drinking Water Guidelines produced by the National Health and Medical Research Council.
TAS Early childhood centre
VIC Early childhood centre
Early childhood centre: Any premises or part thereof providing or intending to provide a centre-based education and
care service within the meaning of the Education and Care Services National Law Act 2010 (Vic), the Education and
Care Services National Regulations and centre-based services that are licensed or approved under State and Territory
children’s services law, but excludes education and care primarily provided to school aged children in outside school Non-cyclonic Region A and B Cyclonic Region C and D
N1, N2, N3 C1
N4, N5, N6 (these wind classes are covered in the ABCB
Housing Provisions Part 2.2).C2, C3, C4 (these wind classes are covered in the ABCB
Housing Provisions Part 2.2).
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 167hours settings.
Effective height: The vertical distance between the floor of the lowest storey included in the calculation of rise in storeys
and the floor of the topmost storey (excluding the topmost storey if it contains only heating, ventilating, lift or other
equipment, water tanks or similar service units).
Efficacy: The degree to which a system achieves a design objective given that it performs to a level consistent with the
system specification during the relevant fire scenario.
Electricity network substation: A building in which high voltage supply is converted or transformed and which is
controlled by a licensed network service provider designated under a power of legislation.
Electric passenger lift: A power-operated lift for raising or lowering people in a car in which the motion of the car is
obtained from an electric motor mechanically coupled to the hoisting mechanism.
Electrohydraulic passenger lift: A power-operated lift for raising or lowering people in a car in which the motion of the
car is obtained from the action of liquid under pressure acting on a piston or ram, the pressure being generated by a
pump driven by an individual electric motor.
Energy value: The net cost to society including, but not limited to, costs to the building user, the environment and energy
networks.
Engaged pier: A pier bonded to a masonry wall by course bonding of masonry units or by masonry ties.
NSW Entertainment venue
Envelope: For the purposes of—
Section J in NCC Volume One, the parts of a building’s fabric that separate a conditioned space or habitable (a)
room from—
the exterior of the building; or (i)
a non- conditioned space including— (ii)
the floor of a rooftop plant room, lift-machine room or the like; and (A)
the floor above a carpark or warehouse; and (B)
the common wall with a carpark , warehouse or the like; or (C)
Part H6 in NCC Volume Two and
Section 13
of the ABCB Housing Provisions, the parts of a building’s fabric (b)that separate artificially heated or cooled spaces from—
the exterior of the building; or (i)
other spaces that are not artificially heated or cooled. (ii)
Equivalent: Equivalent to the level of health, safety and amenity provided by the Deemed-to-Satisfy Provisions .
Evacuation route: The continuous path of travel (including exits, public corridors and the like) from any part of a building,
including within a sole-occupancy unit in a Class 2 or 3 building or Class 4 part, to a safe place .
Evacuation time: The time calculated from when the emergency starts for the occupants of the building to evacuate to a
safe place .
Exit: Means—
Any, or any combination of the following if they provide egress to a road or open space : (a)
An internal or external stairway. (i)
A ramp. (ii)
A fire-isolated passageway . (iii)
A doorway opening to a road or open space ; or (iv)
A horizontal exit or a fire-isolated passageway leading to a horizontal exit . (b)
TAS Expert judgement
Expert judgement: The judgement of an expert who has the qualifications and experience to determine whether a
Performance Solution or Deemed-to-Satisfy Solution complies with the Performance Requirements .
Explanatory Information
Contemporary and relevant qualifications and/or experience are necessary to determine whether a Performance
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 168Solution complies with the Performance Requirements . The level of qualification and/or experience may differ depending
on the complexity of the proposal and the requirements of the regulatory authority. Practitioners should seek advice
from the authority having jurisdiction or appropriate authority for clarification as to what will be accepted.
External wall: For the purposes of—
Volume One, an outer wall of a building which is not a common wall ; or (a)
Volume Two, an outer wall of a building which is not a separating wall . (b)
Extra-low voltage: A voltage not exceeding 50 V AC or 120 V ripple-free DC.
Fabric: The basic building structural elements and components of a building including the roof, ceilings, walls, glazing
and floors.
SA Farm building
Farm building: A Class 7 or 8 building located on land primarily used for farming —
that is— (a)
used in connection with farming ; or (i)
used primarily to store one or more farm vehicles ; or (ii)
a combination of (i) and (ii); and (iii)
in which the total number of persons accommodated at any time does not exceed one person per 200 m² of (b)
floor area or part thereof, up to a maximum of 8 persons; and
with a total floor area of not more than 3500 m². (c)
Farming: Includes—
cultivating, propagating and harvesting plants or fungi or their products or parts, including seeds, spores, bulbs (a)
or the like, but does not include forestry; or
maintaining animals in any physical environment for the purposes of— (b)
breeding them; or (i)
selling them; or (ii)
acquiring and selling their bodily produce such as milk, wool, eggs or the like; or (iii)
a combination of (a) and (b), (c)
but does not include forestry or maintaining animals for sport or recreational purposes.
Farm shed: A single storey Class 7 or 8 building located on land primarily used for farming —
that is— (a)
used in connection with farming ; or (i)
used primarily to store one or more farm vehicles ; or (ii)
a combination of (i) and (ii); and (iii)
occupied neither frequently nor for extended periods by people; and (b)
in which the total number of persons accommodated at any time does not exceed 2; and (c)
with a total floor area of more than 500 m² but not more than 2000 m². (d)
Farm vehicle: A vehicle used in connection with farming .
NSW Film
Finished ground level: The ground level adjacent to footing systems at the completion of construction and landscaping.
Fire actions: Each of the following:
airborne embers; and (a)
burning debris and/or accumulated embers adjacent to building elements; and (b)
heat transfer from combustible materials within the site; and (c)
radiant heat from a bushfire front; and (d)
flame contact from a bushfire front; and (e)
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 169the period of time post fire front subject to collapsing vegetation due to persistent combustion. ( f)
Fire brigade: A statutory authority constituted under an Act of Parliament having as one of its functions, the protection of
life and property from fire and other emergencies.
Fire brigade station: For the purposes of E1D2(1)(b) and I3D9, means a state or territory government operated premises
which is a station for a fire brigade .
Fire compartment: Either—
the total space of a building; or (
a)
when referred to in— (
b)
the Performance Requirements — any part of a building separated from the remainder by barriers to fire ( i)
such as walls and/or floors having an appropriate resistance to the spread of fire with any openings
adequately protected; or
the Deemed-to-Satisfy Provisions — any part of a building separated from the remainder by walls and/or ( ii)
floors each having an FRL not less than that required for a fire wall for that type of construction and where
all openings in the separating construction are protected in accordance with the Deemed-to-Satisfy
Provisions of the relevant Part.
Fire growth: The stage of fire development during which the heat release rate and the temperature of the fire are generally
increasing.
Fire hazard: The danger in terms of potential harm and degree of exposure arising from the start and spread of fire and
the smoke and gases that are thereby generated.
Fire hazard properties: The following properties of a material or assembly that indicate how they behave under specific
fire test conditions:
Average specific extinction area , critical radiant flux and Flammability Index , determined as defined in Schedule ( a)
1.
Smoke-Developed Index , smoke development rate and Spread-of-Flame Index , determined in accordance with ( b)
Specification 3 .
Group number and smoke growth rate index (SMOGRARC), determined in accordance with Specification 7. ( c)
Fire intensity: The rate of release of calorific energy in watts, determined either theoretically or empirically, as applicable.
Fire-isolated passageway: A corridor, hallway or the like, of fire-resisting construction , which provides egress to or from
a fire-isolated stairway or fire-isolated ramp or to a road or open space .
Fire-isolated ramp: A ramp within a fire-resisting enclosure which provides egress from a storey .
Fire-isolated stairway: A stairway within a fire-resisting shaft and includes the floor and roof or top enclosing structure.
Fire load: The sum of the net calorific values of the combustible contents which can reasonably be expected to burn
within a fire compartment , including furnishings, built-in and removable materials, and building elements.
Notes
The calorific values must be determined at the ambient moisture content or humidity (the unit of measurement is MJ).
Fire-protected timber: Fire-resisting timber building elements that comply with Specification 10.
Fire-protective covering: Any one or more of the following:
13 mm fire-protective grade plasterboard. (
a)
12 mm cellulose cement flat sheeting complying with AS/NZS 2908.2 or ISO 8336. (
b)
12 mm fibrous plaster reinforced with 13 mm x 13 mm x 0.7 mm galvanised steel wire mesh located not more (
c)
than 6 mm from the exposed face.
Other material not less fire-protective than 13 mm fire-protective grade plasterboard, fixed in accordance with (
d)
the normal trade practice for a fire-protective covering.
Fire-resistance level (FRL):
The grading periods in minutes determined in accordance with Specifications 1 and 2, for
the following criteria—
structural adequacy ; and ( a)
integrity ; and ( b)
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 170insulation , (c)
and expressed in that order.
Notes
A dash means there is no requirement for that criterion. For example, 90/–/– means there is no requirement for an FRL
for integrity and insulation , and –/–/– means there is no requirement for an FRL.
Fire-resisting construction: For the purposes of Volume One, means one of the Types of construction referred to in Part
C2 of Volume One.
Fire-resisting: For the purposes of—
Volume One, applied to a building element, having an FRL appropriate for that element; or (a)
Volume Two, applied to a structural member or other part of a building, having the FRL required for that structural (b)
member or other part.
Fire safety engineering: Application of engineering principles, rules and expert judgement based on a scientific
appreciation of the fire phenomenon, often using specific design scenario , of the effects of fire and of the reaction
and behaviour of people in order to—
save life, protect property and preserve the environment and heritage from destructive fire; and (a)
quantify the hazards and risk of fire and its effects; and (b)
mitigate fire damage by proper design, construction, arrangement and use of buildings, materials, structures, (c)
industrial processes and transportation systems; and
evaluate analytically the optimum protective and preventive measures, including design, installation and (d)
maintenance of active and passive fire and life safety systems, necessary to limit, within prescribed levels, the
consequences of fire.
Fire safety system: One or any combination of the methods used in a building to—
warn people of an emergency; or (a)
provide for safe evacuation; or (b)
restrict the spread of fire; or (c)
extinguish a fire, (d)
and includes both active and passive systems.
Fire-source feature: Any one or more of the following:
The far boundary of a road, river, lake or the like adjoining the allotment. (a)
A side or rear boundary of the allotment. (b)
An external wall of another building on the allotment which is not a Class 10 building. (c)
Fire wall: A wall with an appropriate resistance to the spread of fire that divides a storey or building into fire compartments .
Fixed wired: For the purposes of Specification 23, a system of electrical wiring (either AC or DC), in which cables are
fixed or supported in position.
Flammability Index: The index number as determined by AS 1530.2.
VIC Flashing
Flashing: A strip or sleeve of impervious material dressed, fitted or built-in to provide a barrier to water movement, or to
divert the travel of water, or to cover a joint where water would otherwise penetrate to the interior of a building, and
includes the following:
Perimeter flashing: a flashing used at the floor-wall junction. (a)
Vertical flashing: a flashing used at wall junctions within shower areas . (b)
Flashover: In relation to fire hazard properties , means a heat release rate of 1 MW.
Flight: That part of a stair that has a continuous series of risers , including risers of winders , not interrupted by a landing
or floor.
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 171Explanatory Information
A flight is the part of a stair that has a continuous slope created by the nosing line of treads. The length of a flight is
limited to restrict the distance a person could fall down a stair.
Quarter landings , as shown in Explanatory Figure 1 , are considered sufficient to halt a person’s fall and therefore are
considered for the purposes of NCC Volume Two and the ABCB Housing Provisions not to be part of the flight .
Figure 1 ( explanat ory): Identification of stair flights — Plan view
VIC Flood hazard area
Flood hazard area: The site (whether or not mapped) encompassing land lower than the flood hazard level which has
been determined by the appropriate authority .
Flood hazard level (FHL): The flood level used to determine the height of floors in a building and represents the defined
flood level plus the freeboard (see Figure 3 ).
Floor area: For the purposes of—
Volume One— (
1)
in relation to a building — the total area of all storeys ; and ( a)
in relation to a storey — the area of all floors of that storey measured over the enclosing walls, and includes— ( b)
the area of a mezzanine within the storey , measured within the finished surfaces of any external walls ; ( i)
and
the area occupied by any internal wall or partitions, any cupboard, or other built-in furniture, fixture or ( ii)
fitting; and
if there is no enclosing wall, an area which has a use that contributes to the fire load or impacts on the ( iii)
safety, health or amenity of the occupants in relation to the provisions of the BCA; and
in relation to a room — the area of the room measured within the internal finished surfaces of the walls, and (
c)
includes the area occupied by any cupboard or other built-in furniture, fixture or fitting; and
in relation to a fire compartment — the total area of all floors within the fire compartment measured within ( d)
the finished internal surfaces of the bounding construction, and if there is no bounding construction, includes
an area which has a use which contributes to the fire load ; and
in relation to an atrium — the total area of all floors within the atrium measured within the finished surfaces ( e)(a) Quarter landing stairway – 2 flights (b) Continuous stairway – 1 flight
(90º change in direction)
(c) Half landing stairway – 2 flights (d) Continuous stairway – 1 flight
(180º change in direction)Quarter
Landing
Flight number 2
Flight number 1Max. 3 winders
Flight
number 1
Half LandingFlight
number 2
Max. 6winders30°30°30°
12345612 34 5
1234567 89 1 0 11 12 13 14 6
30°30°30°
12345678
30°30°30°
16151413121110 9
17123456
654321winders
windersFlight
Flight FlightFlightFlight
LandingLanding
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 172of the bounding construction and if no bounding construction, within the external walls .
Volume Two and the ABCB Housing Provisions, in relation to a room, the area of the room measured within the (
2)
finished surfaces of the walls, and includes the area occupied by any cupboard or other built-in furniture, fixture
or fitting (see Figure 4 ).
Figur
e 4: Identification of floor area of a room
Floor waste: A
grated inlet within a graded floor intended to drain the floor surface.
NSW Flying scenery
Foundation: The ground which supports the building (see Figure 5 ).
Figure 5: Identification of foundation
Fractional effective dose (FED): The fraction of the dose (of thermal ef
fects) that would render a person of average
susceptibility incapable of escape.
Explanatory Information
The definition for FED has been modified from the ISO definition to be made specific for the Fire Safety Verification
Method . The use of CO or CO2 as part of FED is not part of that Verification Method . This is because the ability to
measure CO in a repeatable test varies by two orders of magnitude for common cellosic fuel.
VIC Freeboard
Freeboard: The height above the defined flood level as determined by the appropriate authority , used to compensate for
effects such as wave action and localised hydraulic behaviour.
Fully developed fire: The state of total involvement of the majority of available combustible materials in a fire.
NSW Garage top dwelling
Glazing: For the purposes of—
Section J of Volume One, except for a sole-occupancy unit of a Class 2 building or a Class 4 part of a building— ( a)
a transparent or translucent element and its supporting frame located in the envelope ; and ( i)
includes a window other than a roof light ; or ( ii)
Section J of NCC Volume One, for a sole-occupancy unit of a Class 2 building or a Class 4 part of a building— ( b)Built in wardrobe
Measured from the
inner surface of thewallsBuilt in desk
Floor area tobe measured
Footing
Foundation
Section
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 173a translucent element and its supporting frame located in the external fabric of the building; and ( i)
includes a window other than a roof light ; or ( ii)
Part H6 of NCC Volume Two and
Section 13
of the ABCB Housing Provisions— (c)
a transparent or translucent element and its supporting frame located in the external fabric of the building; ( i)
and
includes a window other than a roof light . ( ii)
Going: The horizontal dimension from the front to the back of a tread less any overhang from the next tread or landing
above (see Figure 11.2.2f in the ABCB Housing Provisions).
Green Star: The building sustainability rating scheme managed by the Green Building Council of Australia.
NSW Grid
Group number: The number of one of 4 groups of materials used in the regulation of fire hazard properties and applied
to materials used as a finish, surface, lining, or attachment to a wall or ceiling.
Habitable room: A room used for normal domestic activities, and—
includes a bedroom, living room, lounge room, music room, television room, kitchen, dining room, sewing room, (
a)
study, playroom, family room, home theatre and sunroom; but
excludes a bathroom, laundry
, water closet, pantry, walk-in wardrobe, corridor, hallway, lobby, photographic (
b)
darkroom, clothes-drying room, and other spaces of a specialised nature occupied neither frequently nor for
extended periods.
Hazard Rating:
A level of potential toxicity that may cause contamination in a drinking water system, having a rating of
Low Hazard , Medium Hazard or High Hazard , determined in accordance with NCC Volume Three.
Health-care building: A
building whose occupants or patients undergoing medical treatment generally need physical
assistance to evacuate the building during an emergency and includes—
a public or private hospital; or (
a)
a nursing home or similar facility for sick or disabled persons needing full-time care; or (
b)
a clinic, day surgery or procedure unit where the effects of the predominant treatment administered involve (
c)
patients becoming non-ambulatory and requiring supervised medical care on the premises for some time after
the treatment.
Heated water:
Water that has been intentionally heated; normally referred to as hot water or warm water.
Heating degree hours: For any one hour when the mean outdoor air temperature is less than 15°C, the degrees Celsius
temperature difference between the mean outdoor air temperature and 15°C.
Heating load:
The calculated amount of energy delivered to the heated spaces of the building annually by artificial means
to maintain the desired temperatures in those spaces.
Heat release: The thermal energy produced by combustion (measured in kJ).
Heat release rate (HRR): The rate of thermal energy production generated by combustion, measured in kW (preferred)
or MW.
High Hazard: Any condition, device or practice which, in connection with a water supply, has the potential to cause death.
High wind area: A region that is subject to design wind speed more than N3 or C1 (see Table 4 ).
Hob: The upstand at the perimeter of a shower area .
Horizontal exit: A required doorway between 2 parts of a building separated from each other by a fire wall .
VIC Hotel offering shared accommodation
Hours of operation: The number of hours when the occupancy of the building is greater than 20% of the peak occupancy.
House energy rating software: For the purposes of—
Volume One, software accredited under the Nationwide House Energy Rating Scheme (NatHERS); or (
a)
Volume Two— (
b)
applied to H6V2—software accredited or previously accredited under the Nationwide House Energy Rating (
i)
Scheme (NatHERS) and the additional functionality provided in non-regulatory mode; and
applied to Specification 42—software accredited under the Nationwide House Energy Rating Scheme (
ii)
(NatHERS).
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 174Explanatory Information
The Nationwide House Energy Rating Scheme (NatHERS) refers to the
Australian Governments’ scheme that facilitates
consistent energy ratings from software tools which are used to assess the potential thermal efficiency of dwelling
envelopes.
Illuminance: The luminous flux falling onto a unit area of surface.
Illumination power density: The total of the power that will be consumed by the lights in a space, including any lamps,
ballasts, current regulators and control devices other than those that are plugged into socket outlets for intermittent
use such as floor standing lamps, desk lamps or work station lamps, divided by the area of the space, and expressed
in W/m2.
Explanatory Information
Illumination power density relates to the power consumed by the lighting system and includes the light source or
luminaire and any control device. The power for the lighting system is the illumination power load. This approach is
more complicated than the lamp power density approach but provides more flexibility for a dwelling with sophisticated
control systems.
The area of the space refers to the area the lights serve. This could be considered a single room, open plan space,
verandah, balcony or the like, or the total area of all these spaces.
Inclined lift: A power-operated device for raising or lowering people within a carriage that has one or more rigid guides
on an inclined plane.
Individual protection: The installation of a backflow prevention device at the point where a water service connects to a
single fixture or appliance.
NSW Information and education facility
Insulation: In relation to an FRL, the ability to maintain a temperature on the surface not exposed to the furnace below
the limits specified in AS 1530.4.
Integrity: In relation to an FRL, the ability to resist the passage of flames and hot gases specified in AS 1530.4.
Internal wall: For the purposes of—
Volume One, excludes a common wall or a party wall; or ( a)
Volume Two, excludes a separating wall , common wall or party wall. ( b)
Interstitial condensation: The condensation of moisture on surfaces between material layers inside the building
component.
Irrigation system: An irrigation system of the following types:
Type A— all permanently open outlets and piping more than 150 mm above finished surface level, not subject (
a)
to ponding or backpressure and not involving injection systems.
T
ype B— irrigation systems in domestic or residential buildings with piping or outlets installed less than 150 mm (
b)
above finished surface level and not involving injection systems.
T
ype C— irrigation systems in other than domestic or residential buildings with piping outlets less than 150 mm (
c)
above finished surface level and not involving injection systems.
T
ype D— irrigation systems where fertilizers, herbicides, nematicides or the like are injected or siphoned into (
d)
the system.
JAS-ANZ:
The Joint Accreditation System of Australia and New Zealand.
Lamp power density: The total of the maximum power rating of the lamps in a space, other than those that are plugged
into socket outlets for intermittent use such as floor standing lamps, desk lamps or work station lamps, divided by the
area of the space, and expressed in W/m2.
Explanatory Information
Lamp power density is a simple means of setting energy consumption at an efficient level for Class 1 and associated
Class 10a buildings.
Lamp refers to the globe or globes that are to be installed in a permanently wired light fitting. The maximum power of
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 175a lamp is usually marked on the fitting as the maximum allowable wattage.
The area of the space refers to the area the lights serve. This could be considered a single room, open plan space,
verandah, balcony or the like, or the total area of all these spaces.
Landing: An area at the top or bottom of a flight or between two flights .
Latent heat gain: The heat gained by the vapourising of liquid without change of temperature.
Lateral support: A support (including a footing, buttress, cross wall, beam, floor or braced roof structure) that effectively
restrains a wall or pier at right angles to the face of the wall or pier.
Lead free: Where a plumbing product or material in contact with drinking water has a weighted average lead content of
not more than 0.25%.
NSW Licensed premises
WA Licensed premises
Lightweight construction: Construction which incorporates or comprises—
sheet or board material, plaster, render, sprayed application, or other material similarly susceptible to damage (
a)
by impact, pressure or abrasion; or
concrete and concrete products containing pumice, perlite, vermiculite, or other soft material similarly susceptible (
b)
to damage by impact, pressure or abrasion; or
masonry having a width of less than 70 mm. (
c)
Loadbearing: Intended to resist vertical forces additional to those due to its own weight.
Loadbearing wall: For the purposes of H1D4 and H2D3 of NCC Volume Two and
Section 4
of the ABCB HousingProvisions, means any wall imposing on the footing a load greater than 10 kN/m.
Loss: Physical damage, financial loss or loss of amenity .
Low Hazard: Any condition, device or practice which, in connection with a water supply, would constitute a nuisance by
colour, odour or taste but does not have the potential to injure or endanger health.
Low rainfall intensity area: An area with a 5 minute rainfall intensity for an annual exceedance probability of 5% of not
more than 125 mm/hour.
Explanatory Information
Rainfall intensity figures can be obtained from Table 7.4.3d in the ABCB Housing Provisions.
Low-rise, low-speed constant pressure lift: A power-operated low-rise, low-speed device for raising or lowering people
with limited mobility on a carriage that is controlled by the application of constant pressure to a control.
Low-rise platform lift: A power-operated device for raising or lowering people with limited mobility on a platform, that is
controlled automatically or by the application of constant pressure to a control.
Low voltage: A voltage exceeding extra-low voltage , but not exceeding 1000 V AC or 1500 V DC.
Luminance contrast: The light reflected from one surface or component, compared to the light reflected from another
surface or component.
Main water heater: The domestic hot water unit in a dwelling that is connected to at least one shower and the largest
number of hot water outlets.
Main space conditioning: Either—
the heating or cooling equipment that serves at least 70% of the conditioned space of a dwelling; or ( a)
if no one heating or cooling equipment serves at least 70% of the conditioned space of the dwelling, the ( b)
equipment that results in the highest net equivalent energy usage when calculated in accordance with
J3D14(1)(a) of NCC V
olume One or 13.6.2(1)(a) of the ABCB Housing Provisions.
Notes
If a multi-split air-conditioning unit is installed, it is considered to be a single heating or cooling service . ( 1)
A series of separate heaters or coolers of the one type can be considered a single heater or cooler type with a (
2)
performance level of that of the unit with the lowest efficiency.
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 176Explanatory Information
The purpose of defining for main space conditioning is to provide criteria upon which the heating or cooling equipment
should be selected when showing compliance with J3D14(1)(a) of NCC Volume One and 13.6.2(1)(a) of the ABCB
Housing Provisions when more than one type and efficiency of equipment is present. In J3D14(1)(a) the formula that
determines ER allows the selection of only one heating or cooling system. This definition requires that if any one system
serves at least 70% of the floor area that is heated or cooled it should be used as the basis of determining ER. If,
however, no one system serves at least 70% of the floor area , then the appliance that results in the highest net equivalent
energy usage, when calculated in accordance with J3D14(1)(a)/13.6.2(1)(a), should be selected.
Massive timber: An element not less than 75 mm thick as measured in each direction formed from solid and laminated
timber.
Maximum retained water level: The point where surface water will start to overflow out of the shower area .
Medium Hazard: Any condition, device or practice which, in connection with a water supply, has the potential to injure or
endanger health.
Membrane: A barrier impervious to moisture.
Explanatory Information
A barrier may be a single or multi-part system.
Mezzanine: An intermediate floor within a room.
Minimum Energy Performance Standards (MEPS): The Minimum Energy Performance Standards for equipment and
appliances established through the Greenhouse and Energy Minimum Standards Act 2012.
NSW Minimum lateral clearance
Mixed construction: A building consisting of more than one form of construction, particularly in double-storey buildings.
Mould: A fungal growth that can be produced from conditions such as dampness, darkness, or poor ventilation.
NABERS Energy: The National Australian Built Environment Rating Systems for energy efficiency, which is managed by
the New South Wales Government.
Network Utility Operator: A person who—
undertakes the piped distribution of drinking water or non-drinking water for supply; or ( a)
is the operator of a sewerage system or a stormwater drainage system. ( b)
Explanatory Information
A Network Utility Operator in most States and Territories is the water and sewerage authority licensed to supply water
and receive sewage and/or stormwater. The authority operates or proposes to operate a network that undertakes the
distribution of water for supply and undertakes to receive sewage and/or stormwater drainage. This authority may be a
licensed utility, local government body or council.
Non-combustible: Applied to—
a material — means not deemed combustible as determined by AS 1530.1 — Combustibility Tests for Materials; ( a)
or
construction or part of a building — means constructed wholly of materials that are not deemed combustible . ( b)
Non-drinking water: Water which is not intended primarily for human consumption.
Occupant traits:
For the purposes of—
Volume One, the features, needs and profile of the occupants in a habitable room or space; or ( a)
Volume Two, the features, needs and profile of the occupants in a room or space. (
b)
Explanatory Information
For the purpose of Volume Two, this term is used to describe the characteristics of the occupants and their associated
requirements in relation to a room or space.
For example, in relation to a bedroom, the following occupant characteristics and associated requirements should be
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 177considered:
Characteristics: height, mobility and how often the space will be used. •
Requirements: a sleeping space and a space to undertake leisure activities. •
Occupiable outdoor area: A space on a roof, balcony or similar part of a building—
that is open to the sky; and (a)
to which access is provided, other than access only for maintenance; and (b)
that is not open space or directly connected with open space . (c)
VIC On-site wastewater management system
On-site wastewater management system: A system that receives and/or treats wastewater generated and discharges
the resulting effluent to an approved disposal system or re-use system.
Open-deck carpark: A carpark in which all parts of the parking storeys are cross-ventilated by permanent unobstructed
openings in not fewer than 2 opposite or approximately opposite sides, and—
each side that provides ventilation is not less than 1/6 of the area of any other side; and (a)
the openings are not less than ½ of the wall area of the side concerned. (b)
Open space: A space on the allotment, or a roof or similar part of a building adequately protected from fire, open to the
sky and connected directly with a public road.
Open spectator stand: A tiered stand substantially open at the front.
Other property: All or any of the following—
any building on the same or an adjoining allotment; and (a)
any adjoining allotment; and (b)
a road. (c)
Outdoor air: Air outside the building.
Outdoor air economy cycle: A mode of operation of an air-conditioning system that, when the outdoor air thermodynamic
properties are favourable, increases the quantity of outdoor air used to condition the space.
Outfall: That part of the disposal system receiving surface water from the drainage system and may include a natural
water course, kerb and channel, or soakage system.
Overflow device: A device that provides relief to a water service, sanitary plumbing and drainage system, rainwater
service or stormwater system to avoid the likelihood of uncontrolled discharge .
Panel wall: A non- loadbearing external wall , in frame or similar construction, that is wholly supported at each storey .
Partially buried rainwater tank: A rainwater tank that is not completely covered by earth but is partially set into the
ground.
Patient care area: A part of a health-care building normally used for the treatment, care, accommodation, recreation,
dining and holding of patients including a ward area and treatment area .
Performance-based design brief (PBDB): The report that defines the scope of work for the performance-based analysis,
the technical basis for analysis, and the criteria for acceptance of any relevant Performance Solution as agreed by
stakeholders.
Performance Requirement: A requirement which states the level of performance which a Performance Solution or
Deemed-to-Satisfy Solution must meet.
Performance Solution: A method of complying with the Performance Requirements other than by a Deemed-to-Satisfy
Solution .
Perimeter of building: For the purposes of
Section 8
of the Housing Provisions, means the external envelope of a building.TAS Permit Authority
Personal care services: Any of the following:
The provision of nursing care. (a)
Assistance or supervision in— (b)
bathing, showering or personal hygiene; or (i)
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 178toileting or continence management; or ( ii)
dressing or undressing; or (
iii)
consuming food. (
iv)
The provision of direct physical assistance to a person with mobility problems. (
c)
The management of medication. (
d)
The provision of substantial rehabilitative or development assistance. (
e)
Piping: For the purposes of Section J in Volume One or Part H6 in Volume Two, and
Section 13
of the Housing Provisions,means an assembly of pipes, with or without valves or other fittings, connected together for the conveyance of liquids
and gases.
NSW Planning for Bush Fire Protection
Pliable building membrane: A water barrier as classified by AS 4200.1.
VIC Plumbing
Plumbing: Any water service plumbing or sanitary plumbing system.
Plumbing or Drainage Solution: A solution which complies with the Performance Requirement and is a—
Performance Solution ; or ( a)
Deemed-to-Satisfy Solution ; or ( b)
combination of (a) and (b). (
c)
Point of connection: Any of the following:
For a cold water service, means the point where the cold water service connects to— (
a)
the Network Utility Operator’s water supply system; or ( i)
the point of isolation to an alternative water source where there is no Network Utility Operator’s water supply ( ii)
available or is not utilised.
For a heated water service, means the point where the water heater connects to the cold water service ( b)
downstream of the isolation valve.
For sanitary drainage , means the point where the on-site sanitary drainage system connects to— ( c)
the Network Utility Operator’s sewerage system; or ( i)
an on-site wastewater management system . ( ii)
For sanitary plumbing , means the point where the sanitary plumbing system connects to the sanitary drainage (d)
system.
For a rainwater service , means the point where the rainwater service — ( e)
connects to the point of isolation for the rainwater storage ; or ( i)
draws water from the rainwater storage . ( ii)
For stormwater disposal, means the point where the on-site stormwater drainage system connects to— ( f)
the Network Utility Operator’s stormwater system; or ( i)
an approved on-site disposal system. (
ii)
For a fire-fighting water service, means the point where the service connects to— (
g)
a cold water service, downstream of a backflow prevention device ; or ( i)
the Network Utility Operator’s water supply system; or ( ii)
the point of isolation to an alternative water source. (
iii)
Notes
A domestic fire sprinkler service conforming to FPAA101D is considered part of the cold water service.
Explanatory Information
The point of connection is usually determined by the Network Utility Operator according to the water and sewerage
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 179Acts, Regulations and codes that apply within the Network Utility Operator’s licensed area and/or jurisdiction.
WA Potable water
Predicted Mean Vote (PMV): The Predicted Mean Vote of the thermal perception of building occupants determined in
accordance with ANSI/ASHRAE Standard 55.
Preformed shower base: A preformed, prefinished vessel installed as the finished floor of a shower compartment, and
which is provided with a connection point to a sanitary drainage system.
Explanatory Information
Preformed shower bases are commonly made of plastics, composite materials, vitreous enamelled pressed steel, or
stainless steel.
Pressure vessel: A vessel subject to internal or external pressure, including interconnected parts and components, valves,
gauges and other fittings up to the first point of connection to connecting piping, and—
includes fire heaters and gas cylinders; but (
a)
excludes— (
b)
any vessel that falls within the definition of a boiler ; and ( i)
storage tanks and equipment tanks intended for storing liquids where the pressure at the top of the tank is (
ii)
not exceeding 1.4 kPa above or 0.06 kPa below atmospheric pressure; and
domestic-type hot water supply heaters and tanks; and (
iii)
pressure vessels installed for the purposes of fire suppression or which serve a fire suppression system. (
iv)
QLD Primary building element
Primary building element: For the purposes of—
Volume One, a member of a building designed specifically to take part of the loads specified in B1D3 and includes (
a)
roof, ceiling, floor, stairway or ramp and wall framing members including bracing members designed for the
specific purpose of acting as a brace to those members; or
Part 3.4 of the
ABCB Housing Provisions, a member of a building designed specifically to take part of the building (
b)
loads and includes roof, ceiling, floor, stairway or ramp and wall framing members including bracing members
designed for the specific purpose of acting as a brace to those members.
Explanatory Information
The loads to which a building may be subjected are dead, live, wind, snow and earthquake loads. Further information
on building loads can be found in the AS 1170 series of Standards.
Primary insulation layer: The most interior insulation layer of a wall or roof construction.
Private bushfire shelter: A structure associated with, but not attached to, or part of a Class 1a dwelling that may, as a
last resort, provide shelter for occupants from immediate life threatening effects of a bushfire.
Private garage: For the purposes of—
Volume One— (
a)
any garage associated with a Class 1 building; or (
i)
any single storey of a building of another Class containing not more than 3 vehicle spaces, if there is only ( ii)
one such storey in the building; or
any separate single storey garage associated with another building where such garage contains not more ( iii)
than 3 vehicle spaces; or
V
olume Two— (
b)
any garage associated with a Class 1 building; or (
i)
any separate single storey garage associated with another building where such garage contains not more ( ii)
than 3 vehicle spaces.
Product: Plumbing and drainage items within the scope of Volume Three including but not limited to—
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 180materials, fixtures and components used in a plumbing or drainage installation; and (a)
appliances and equipment connected to a plumbing or drainage system. (b)
Product Technical Statement: A form of documentary evidence stating that the properties and performance of a building
material, product or form of construction fulfil specific requirements of the NCC, and describes—
the application and intended use of the building material, product or form of construction; and (a)
how the use of the building material, product or form of construction complies with the requirements of the NCC (b)
Volume One and Volume Two; and
any limitations and conditions of the use of the building material, product or form of construction relevant to (b). (c)
Professional engineer: A person who is—
if legislation is applicable — a registered professional engineer in the relevant discipline who has appropriate (a)
experience and competence in the relevant field; or
if legislation is not applicable— (b)
registered in the relevant discipline on the National Engineering Register (NER) of the Institution of (i)
Engineers Australia (which trades as ‘Engineers Australia’); or
eligible to become registered on the Institution of Engineers Australia’s NER and has appropriate experience (ii)
and competence in the relevant field.
NSW Projection suite
TAS Public
WA Public building
Public corridor: An enclosed corridor, hallway or the like which—
serves as a means of egress from 2 or more sole-occupancy units to a required exit from the storey concerned; (a)
or
is required to be provided as a means of egress from any part of a storey to a required exit. (b)
Rainwater service: A water service which distributes water from the isolation valve of the rainwater storage to the rainwater
points of discharge for purposes such as for clothes washing, urinal and water closet flushing and external hose
cocks.
Rainwater storage: Any storage of rainwater collected from a roof catchment area which is used to supply water for the
primary purposes of drinking, personal hygiene or other uses.
Explanatory Information
Generally this applies to alternative water sources not supplied by a Network Utility Operator . This does not include
rainwater storage for non-drinking purposes.
SA Rainwater tank
Rapid roller door: A door that opens and closes at a speed of not less than 0.5 m/s.
Recognised expert: A person with qualifications and experience in the area of plumbing or drainage in question
recognised by the authority having jurisdiction.
Explanatory Information
A recognised expert is a person recognised by the authority having jurisdiction as qualified to provide evidence under
A5G4(5) . Generally, this means a hydraulic consultant or engineer, however the specific requirements are determined
by the authority having jurisdiction.
Under A5G4(5) , a report from a recognised expert may be used as evidence of suitability that a product listed on the
WaterMark Schedule of Excluded Products , or a plumbing or drainage system, complies with a Performance
Requirement or Deemed-to-Satisfy Provisions .
Reference building: For the purposes of—
Volume One, a hypothetical building that is used to calculate the maximum allowable— (a)
annual greenhouse gas emissions for the common area of a Class 2 building or a Class 3 to 9 building; or (i)
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 181heating load , cooling load and energy value for a sole-occupancy unit of a Class 2 building or a Class 4 ( ii)
part of a building; or
V
olume Two, a hypothetical building that is used to determine the maximum allowable heating load and cooling (b)
load for the proposed building.
Reflective insulation: A
building membrane with a reflective surface such as a reflective foil laminate, reflective barrier,
foil batt or the like capable of reducing radiant heat flow.
Explanatory Information
For Volume Two:
Typical R-Values achieved by adding reflective insulation are given in the explanatory information accompanying •
Section 13
of the ABCB Housing Provisions. Information on specific products may be obtained from reflectiveinsulation manufacturers.
The surface of reflective insulation may be described in terms of its emittance (or infra-red emittance) or in terms •
of its reflectance (or solar reflectance). Generally, for the surface of a particular reflective insulation : emittance
+ reflectance = 1.
Some types of reflective insulation may also serve the purposes of waterproofing or vapour proofing. •
Regulated energy: The energy consumed by a building’s services minus the amount of renewable energy generated
and used on site.
Reinforced masonry: Masonry reinforced with steel reinforcement that is placed in a bed joint or grouted into a core to
strengthen the masonry.
Reliability: The probability that a system performs to a level consistent with the system specification.
Renewable energy: Energy that is derived from sources that are regenerated, replenished, or for all practical purposes
cannot be depleted and the energy sources include, but are not limited to, solar, wind, hydroelectric, wave action and
geothermal.
Required: Required to satisfy a Performance Requirement or a Deemed-to-Satisfy Provision of the NCC as appropriate.
Required safe egress time (RSET): The time required for safe evacuation of occupants to a place of safety prior to the
onset of untenable conditions.
Residential aged care building: A Class 3 or 9a building whose residents, due to their incapacity associated with the
ageing process, are provided with physical assistance in conducting their daily activities and to evacuate the building
during an emergency.
Residential care building: A Class 3, 9a or 9c building which is a place of residence where 10% or more of persons who
reside there need physical assistance in conducting their daily activities and to evacuate the building during an
emergency (including any aged care building or residential aged care building ) but does not include a hospital.
VIC Residential care building (Vic)
Resident use area: Part of a Class 9c building normally used by residents, and—
includes sole-occupancy units , lounges, dining areas, activity rooms and the like; but ( a)
excludes offices, storage areas, commercial kitchens, commercial laundries and other spaces not for the use of (
b)
residents.
Resistance to the incipient spread of fire: In relation to a ceiling membrane, means the ability of the membrane to
insulate the space between the ceiling and roof, or ceiling and floor above, so as to limit the temperature rise of
materials in this space to a level which will not permit the rapid and general spread of fire throughout the space.
Explanatory Information
Resistance to the incipient spread of fire refers to the ability of a ceiling to prevent the spread of fire and thermally
insulate the space between the ceiling and the roof or floor above. “Resistance to the incipient spread of fire” is superior
to “fire-resistance” because it requires a higher standard of heat insulation.
The definition is used in Volume Two for separating floors/ceilings for a Class 1a dwelling located above a non-
appurtenant private garage .
Rise in storeys: The greatest number of storeys calculated in accordance with C2D3 of Volume One.
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 182Riser: The height between consecutive treads and between each landing and continuous tread.
VIC Restricted children’s service
Rolled fill: Material placed in layers and compacted by repeated rolling by an excavator.
SA Roof catchment area
Roof light: For the purposes of Section J and Part F6 in NCC Volume One, Part H6 in NCC Volume Two, and Part 10.5
and
Section 13
of the ABCB Housing Provisions, a skylight, window or the like installed in a roof—to permit natural light to enter the room below; and (
a)
at an angle between 0 and 70 degrees measured from the horizontal plane. (
b)
NSW Row
R-Value: The thermal resistance of a component calculated by dividing its thickness by its thermal conductivity, expressed
in m2.K/W.
Safe place: Either—
a place of safety within a building— (
a)
which is not under threat from a fire; and (
i)
from which people must be able to safely disperse after escaping the effects of an emergency to a road or (
ii)
open space ; or
a road or open space . ( b)
Sanitary compartment: A room or space containing a closet pan or urinal (see Figures 6a and 6b).
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 183 Figure 6a: Identification of a sanitary compartment (diagram a )
Sanitary
compartment
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 184 Figure 6b: Identification of a sanitary compartment (diagr am b )
Sarking-type material: A material such as a reflective insulation or other flexible membrane of a type normally used for
a purpose such as waterproofing, vapour management or thermal reflectance.
School: Includes a primary or secondary school, college, university or similar educational establishment.
TAS School age care facility
Screed: A layer of material (usually cement based) which sets in situ between a structural base and the finished floor
material.
Self-closing: For the purposes of—
Volume One, applied to a door, means equipped with a device which returns the door to the fully closed position (a)
immediately after each opening; or
Volume Two, applied to a door or window , means equipped with a device which returns the door or window to (b)
the fully closed and latched position immediately after each manual opening.
Sensible heat gain: The heat gained which causes a change in temperature.
Separating element: A barrier that exhibits fire integrity , structural adequacy , insulation , or a combination of these for a
period of time under specified conditions (often in accordance with AS 1530.4).
Separating wall: A wall that is common to adjoining Class 1 buildings (see Figure 7 ). NOT a
sanitary
compartment
Sanitary
compartment
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 185 Figure 7 : Separating wall
Figure Notes
In Volume Two a separating wall may also be known as a party wall and typically is required to be fire-resisting
construction (see ABCB Housing Provisions Parts 9.2 and 9.3).
Service: For the purposes of Section J in Volume One, means a mechanical or electrical system that uses energy to
provide air-conditioning , mechanical ventilation, heated water supply, artificial lighting, vertical transport and the like
within a building, but which does not include—
systems used solely for emergency purposes; and (a)
cooking facilities; and (b)
portable appliances. (c)
Service station: A garage which is not a private garage and is for the servicing of vehicles, other than only washing,
cleaning or polishing.
Shaft: The walls and other parts of a building bounding—
a well, other than an atrium well ; or (a)
a vertical chute, duct or similar passage, but not a chimney or flue. (b)
VIC Shared accommodation building
Shower area: The area affected by water from a shower, including a shower over a bath and for a shower area that is—
Enclosed – the area enclosed by walls or screens including hinged or sliding doors that contain the spread of (a)
water to within that space; or
Unenclosed – the area where, under normal use, water from the shower rose is not contained within the shower (b)
area.
Shower screen: The panels, doors or windows enclosing or partially enclosing a shower area .
Single leaf masonry: Outer walls constructed with a single thickness of masonry unit.
Site: The part of the allotment of land on which a building stands or is to be erected.
Sitework: Work on or around a site, including earthworks, preparatory to or associated with the construction, alteration ,
demolition or removal of a building.
NSW Small live music or arts venue
SA Small arts venue
Small-scale Technology Certificate: A certificate issued under the Commonwealth Government’s Small-scale Renewable
Energy Scheme.
Small-sized, low-speed automatic lift: A restricted use power-operated device for the infrequent raising or lowering of
people with limited mobility on a platform that is controlled automatically but has the capability of being electrically
isolated by a key-lockable control.
Smoke-and-heat vent: A vent, located in or near the roof for smoke and hot gases to escape if there is a fire in the
building.
Smoke-Developed Index: The index number for smoke as determined by AS/NZS 1530.3. Separating walls
ElevationClass 1 building Class 1 building Class 1 building
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 186Smoke development rate: The development rate for smoke as determined by testing flooring materials in accordance
with AS ISO 9239.1.
Smoke growth rate index (SMOGRARC): The index number for smoke used in the regulation of fire hazard properties
and applied to materials used as a finish, surface, lining or attachment to a wall or ceiling.
Solar admittance: The fraction of incident irradiance on a wall-glazing construction that adds heat to a building’s space.
Sole-occupancy unit: A room or other part of a building for occupation by one or joint owner, lessee, tenant, or other
occupier to the exclusion of any other owner, lessee, tenant, or other occupier and includes—
a dwelling; or (a)
a room or suite of rooms in a Class 3 building which includes sleeping facilities; or (b)
a room or suite of associated rooms in a Class 5, 6, 7, 8 or 9 building; or (c)
a room or suite of associated rooms in a Class 9c building, which includes sleeping facilities and any area for (d)
the exclusive use of a resident.
NSW Spa pool
Spandrel panel: For the purposes of Section J, means the opaque part of a façade in curtain wall construction which is
commonly adjacent to, and integrated with, glazing .
NSW Special fire protection purpose
Spiral stairway: A stairway with a circular plan, winding around a central post with steps that radiate from a common
centre or several radii (see Figures 11.2.2d and 11.2.2e in the ABCB Housing Provisions).
Spread-of-Flame Index: The index number for spread of flame as determined by AS/NZS 1530.3.
Sprinkler alarm switch: For the purposes of Specification 23, a device capable of sending an electrical signal to activate
an alarm when a residential sprinkler head is activated (e.g. a flow switch).
Stack bonded pier: A pier where the overlap of a masonry unit is not more than 25% of the length of the masonry unit
below.
Stage: A floor or platform in a Class 9b building on which performances are presented before an audience.
Stairway platform lift: A power-operated device for raising or lowering people with limited mobility on a platform (with or
without a chair) in the direction of a stairway.
Standard Fire Test: The Fire-resistance Tests of Elements of Building Construction as described in AS 1530.4.
SA Storage shed
Storey: A space within a building which is situated between one floor level and the floor level next above, or if there is no
floor above, the ceiling or roof above, but not—
a space that contains only— (a)
a lift shaft , stairway or meter room; or (i)
a bathroom, shower room, laundry, water closet, or other sanitary compartment ; or (ii)
accommodation intended for not more than 3 vehicles; or (iii)
a combination of the above; or (iv)
a mezzanine . (b)
Structural adequacy: In relation to an FRL, means the ability to maintain stability and adequate loadbearing capacity as
determined by AS 1530.4.
Structural member: A component or part of an assembly which provides vertical or lateral support to a building or
structure.
Surface water: All naturally occurring water, other than sub-surface water, which results from rainfall on or around the
site or water flowing onto the site.
Swimming pool: Any excavation or structure containing water and principally used, or that is designed, manufactured or
adapted to be principally used for swimming, wading, paddling, or the like, including a bathing or wading pool, or spa.
Tapered tread: A stair tread with a walking area that grows smaller towards one end.
NSW Temporary structure
TAS Temporary structure
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 187Thermal comfort level: The level of thermal comfort in a building expressed as a PMV sensation scale.
Thermal energy load: The sum of the heating load and the cooling load .
Total R-Value: The sum of the R-Values of the individual component layers in a composite element including any building
material, insulating material, airspace, thermal bridging and associated surface resistances, expressed in m2.K/W.
Total System Solar Heat Gain Coefficient (SHGC): For the purposes of—
Volume One, the fraction of incident irradiance on a wall-glazing construction or a roof light that adds heat to a (a)
building’s space; or
Volume Two, the fraction of incident irradiance on glazing or a roof light that adds heat to a building’s space. (b)
Total System U-Value: The thermal transmittance of the composite element allowing for the effect of any airspaces,
thermal bridging and associated surface resistances, expressed in Wm-2K-1.
Treatment area: An area within a patient care area such as an operating theatre and rooms used for recovery, minor
procedures, resuscitation, intensive care and coronary care from which a patient may not be readily moved.
Uncontrolled discharge: Any unintentional release of fluid from a plumbing and drainage system and includes leakage
and seepage.
Unique wall: For the purposes of F3V1 in Volume One and H2V1 in Volume Two, a wall which is neither a cavity wall nor
a direct fix cladding wall .
Unobstructed opening: For the purposes of
Section 8
of the ABCB Housing Provisions, a glazed area that a personcould mistake for an open doorway or clearway and walk into the glazed panel.
Unprotected water service: Unprotected water service means that the water service may be contaminated from a
surrounding hazard.
Unreinforced masonry: Masonry that is not reinforced.
Vapour permeance: The degree that water vapour is able to diffuse through a material, measured in µg/N.s and tested
in accordance with the ASTM-E96 Procedure B – Water Method at 23°C 50% relative humidity.
Vapour pressure: The pressure at which water vapour is in thermodynamic equilibrium with its condensed state.
Ventilation opening: An opening in the external wall , floor or roof of a building designed to allow air movement into or
out of the building by natural means including a permanent opening, an openable part of a window , a door or other
device which can be held open.
Verification Method: A test, inspection, calculation or other method that determines whether a Performance Solution
complies with the relevant Performance Requirements .
Vessel: For the purposes of Volume One and Part 10.2 of the ABCB Housing Provisions, an open, pre-formed, pre-finished
concave receptacle capable of holding water, usually for the purpose of washing, including a basin, sink, bath, laundry
tub and the like.
Visibility: The maximum distance at which an object of defined size, brightness and contrast can be seen and recognised.
Voltage: A difference of potential, measured in Volts (V) and includes extra-low voltage and low voltage .
Volume: In relation to—
a building — the volume of the total space of the building measured above the lowest floor (including, for a (a)
suspended floor, any subfloor space), over the enclosing walls, and to the underside of the roof covering; or
a fire compartment — the volume of the total space of the fire compartment measured within the inner finished (b)
surfaces of the enclosing fire-resisting walls and/or floors, and—
if there is no fire-resisting floor at the base of the fire compartment , measured above the finished surface (i)
of the lowest floor in the fire compartment ; and
if there is no fire-resisting floor at the top of the fire compartment , measured to the underside of the roof (ii)
covering of the fire compartment ; and
if there is no fire-resisting wall, measured over the enclosing wall and if there is no enclosing wall, includes (iii)
any space within the fire compartment that has a use which contributes to the fire load ; or
an atrium — the volume of the total space of the atrium measured within the finished surfaces of the bounding (c)
construction and if there is no bounding construction, within the external walls .
Waffle raft: A stiffened raft with closely spaced ribs constructed on the ground and with slab panels supported between
ribs.
(1 May 2023)
Definitions
NCC 2022 Volume Three - Plumbing Code of Australia Page 188Wall-glazing construction: For the purposes of Section J in Volume One, the combination of wall and glazing components
comprising the envelope of a building, excluding—
display glazing ; and ( a)
opaque non-glazed openings such as doors, vents, penetrations and shutters. (
b)
Ward area: That part of a patient care area for resident patients and may contain areas for accommodation, sleeping,
associated living and nursing facilities.
Water control layer: A pliable building membrane or the exterior cladding when no pliable building membrane is present.
WaterMark Certification Scheme: The ABCB scheme for certifying and authorising plumbing and drainage products .
WaterMark Conformity Assessment Body (WMCAB): A conformity assessment body registered with and accredited
by the JAS-ANZ to conduct evaluations leading to product certification and contracted with the administering body to
issue the WaterMark Licence .
WaterMark Licence: A licence issued by a WaterMark Conformity Assessment Body .
WaterMark Schedule of Excluded Products: The list maintained by the administering body of products excluded from
the WaterMark Certification Scheme .
WaterMark Schedule of Products: The list maintained by the administering body of products included in the WaterMark
Certification Scheme , and the specifications to which the products can be certified.
Explanatory Information
The WaterMark Schedule of Products and the WaterMark Schedule of Excluded Products can be viewed on the ABCB
website at www.abcb.gov.au .
Waterproof: The property of a material that does not allow water to penetrate through it.
Waterproofing system: A combination of elements that are required to achieve a waterproof barrier as required by H4D2
and H4D3 including substrate, membrane , bond breakers, sealants, finishes and the like.
Water resistant: The property of a system or material that restricts water movement and will not degrade under conditions
of water.
Water sensitive materials: Materials that have an inherent capacity to absorb water vapour and include timber,
plasterboard, plywood, oriented strand board and the like.
Waterstop: A vertical extension of the waterproofing system forming a barrier to prevent the passage of water in a floor
or other horizontal surfaces.
Watertight: Will not allow water to pass from the inside to the outside of the component or joint and vice versa.
Weighted average: Is calculated across the wetted surface area of a pipe, pipe fitting or plumbing fixture.
WA WELS
Wet area: An area within a building supplied with water from a water supply system, which includes bathrooms, showers,
laundries and sanitary compartments and excludes kitchens, bar areas, kitchenettes or domestic food and beverage
preparation areas.
Wetted surface area: Is calculated by the total sum of diameter (D) in contact with drinking water .
Winders: Treads within a straight flight that are used to change direction of the stair (see Explanatory Figure 1 ).
Window: Includes a roof light , glass panel, glass block or brick, glass louvre, glazed sash, glazed door, or other device
which transmits natural light directly from outside a building to the room concerned when in the closed position.
Yield: The mass of a combustion product generated during combustion divided by the mass loss of the test specimen as
specified in the design fire .
Zone protection: The installation of a backflow prevention device at the point where a water service is connected to
multiple fixtures or appliances, with no backflow prevention device installed as individual protection downstream of
this point.
(1 May 2023)
Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 189Schedule 2 Referenced documents
Referenced documents
(1 May 2023)
Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 190
The Standards and other documents listed in this Schedule are referenced in the NCC.Referenced documents
(1 May 2023)
Table 1: Schedule of referenced documents
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS/NZS ISO 717
Part 12004 Acoustics — Rating of sound insulation in
buildings and of building elements — Airborne sound insulation. (See Note 1)F7V1, F7V2, F7V3, F7V4, F7D3H4V4 10.7.2 N/A
AS ISO 717 Part 2 2004 Acoustics — Rating of sound insulation in
buildings and of building elements — Impact sound insulationF7V1, F7V3, F7D4N/A N/A N/A
AS 1056 Part 1 1991 Storage water heaters — General
requirements (incorporating amendments 1, 2, 3, 4 and 5)N/A N/A N/A
B2D2
AS/NZS 1170 Part 02002 Structural design actions — General
principles (incorporating amendments 1, 3 and 4)B1V1, B1D2, Spec 4H1V1, H1D7 2.2.2 N/A
AS/NZS 1170 Part 12002 Structural design actions — Permanent,
imposed and other actions (incorporating amendments 1 and 2)B1D3 N/A 2.2.3, 2.2.4, 8.3.1,
11.2.2, 11.2.3, 11.3.4N/A
AS/NZS 1170 Part 22021 Structural design actions — Wind actions B1D3, B1D4,
Spec 4, F3V1, Schedule 1 H1D7, H2V1, Schedule 12.2.3, Schedule 1 Schedule 1
AS/NZS 1170 Part 32003 Structural design actions — Snow and ice
actions (incorporating amendments 1 and 2)B1D3 N/A 2.2.3
AS 1170 Part 4 2007 Structural design actions — Earthquake
actions in Australia (incorporating amendments 1 and 2)B1D3 H1D4, H1D5,
H1D6, H1D92.2.3 N/A
AS 1191 2002 Acoustics — Method for laboratory
measurement of airborne sound transmission insulation of building elementsSpec 29 N/A N/A N/A
AS 1273 1991 Unplasticized PVC (UPVC) downpipe and
fittings for rainwaterN/A N/A 7.4.2 N/A
AS 1288 2021 Glass in buildings — Selection and
installation B1D4, Spec 11, Spec 12H1D8 8.3.1 N/A
AS 1289.6.3.3 1997 Methods of testing soils for engineering
purposes — Method 6.3.3: Soil strength and consolidation tests — Determination of the penetration resistance of a soil — Perth sand penetrometer test (incorporating amendment 1)N/A N/A 4.2.4 N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 191
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 1397 2021 Continuous hot-dip metallic coated steel
sheet and strip — Coatings of zinc and zinc
alloyed with aluminium and magnesium (See Note 10)N/A N/A 7.2.2 N/A
AS 1428 Part 1 2009 Design for access and mobility — General requirements for access — New building work (incorporating amendments 1 and 2)D3D11, D3D16, D3D22, D4D2, D4D3, D4D4, D4D7, D4D10, D4D11, D4D13, Spec 16, E3D10, F4D5, G4D5, Schedule 1 Schedule 1 Schedule 1 Schedule 1,
E1D2
AS 1428 Part 1 2001 Design for access and mobility — General requirements for access — New building workI2D7, I2D8, I2D10, I2D15N/A N/A
E1D2
AS 1428 Part 1 (Supplement 1)1993 Design for access and mobility — General
requirements for access — Buildings — CommentaryI2D2 N/A N/A N/A
AS 1428 Part 2 1992 Design for access and mobility — Enhanced
and additional requirements — Buildings and facilitiesI2D2, I2D3, I2D4, I2D5, I2D7, I2D10, I2D11, I2D12, I2D13, I2D14N/A N/A
E1D2
AS 1428 Part 4 1992 Design for access and mobility — Tactile ground surface indicators for the orientation of people with vision impairmentI2D11 N/A N/A N/A
AS/NZS 1428 Part 4.12009 Design for access and mobility — Means to
assist the orientation of people with vision impairment — Tactile ground surface indicators (incorporating amendments 1 and 2)D4D9 N/A N/A N/A
AS 1530 Part 1 1994 Methods for fire tests on building materials, components and structures — Combustibility test for materialsSchedule 1 Schedule 1 Schedule 1 Schedule 1
AS 1530 Part 2 1993 Methods for fire tests on building materials, components and structures — Test for flammability of materials (incorporating amendment 1)Schedule 1 Schedule 1 Schedule 1 Schedule 1Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 192
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS/NZS 1530 Part
31999 Methods for fire tests on building materials,
components and structures — Simultaneous determination of ignitability, flame propagation, heat release and smoke releaseSchedule 1,
Spec
3Schedule 1, Spec
3Schedule 1 Schedule 1,
Spec 3
AS 1530 Part 4 2014 Methods for fire tests on building materials, components and structures — Fire resistance tests for elements of constructionC4D15, C4D16, Spec 9, Spec 10, Spec 13, Spec 14, Schedule 1,
Spec 39.3.2, Schedule 1,
Spec 3Schedule 1 Schedule 1,
Spec 3
AS 1530 Part 8.1 2018 Methods for fire tests on building materials, components and structures — Tests on elements of construction for buildings exposed to simulated bushfire attack — Radiant heat and small flaming sourcesSpec 43 N/A N/A N/A
AS/NZS 1546 Part 12008 On-site domestic wastewater treatment units
- Septic tanksN/A N/A N/A
C3D2
AS/NZS 1546 Part 22008 On-site domestic wastewater treatment units
- Waterless composting toiletsN/A N/A N/A
C3D3
AS 1546 Part 3 2017 On-site domestic wastewater treatment units - Secondary treatment systems(incorporating amendment 1)N/A N/A N/A
C3D4
AS 1546 Part 4 2016 On-site domestic wastewater treatment units - Domestic greywater treatment systemsN/A N/A N/A
C3D5
AS/NZS 1547 2012 On-site domestic wastewater management N/A N/A N/A C3D6
AS 1562 Part 1 2018 Design and installation of sheet roof and wall cladding — Metal (See Note 2)B1D4, F3D2, F3D5H1D7 N/A N/A
AS1562 Part 3 2006 Design and installation of sheet roof and wall
cladding — PlasticB1D4, F3D2 H1D7 N/A N/A
AS 1657 2018 Fixed platforms, walkways, stairways and
ladders — Design, construction and installationD2D21, D2D22, D3D23, I1D6, I3D5N/A N/A N/A
AS/NZS 1664 Part 11997 Aluminium structures — Limit state design
(incorporating amendment 1)B1D4 N/A 2.2.4 N/A
AS/NZS 1664 Part 21997 Aluminium structures — Allowable stress
design (incorporating amendment 1)B1D4 N/A 2.2.4 N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 193
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 1668 Part 1 2015 The use of ventilation and air conditioning in
buildings — Fire and smoke control in buildings (incorporating amendment 1)C3D13, C4D15, Spec 11, D2D12, Spec 19, E2D3, E2D4, E2D6, E2D7, E2D8, E2D9, E2D11, E2D12, E2D13, E2D16, E2D17, E2D19, F6D12, Spec 21, Spec 31N/A N/A N/A
AS 1668 Part 2 2012 The use of ventilation and air conditioning in buildings — Mechanical ventilation in buildings (incorporating amendments 1 and 2)E2D12, F6V1, F6D6, F6D11, F6D12, F8D4, J6D4H4V3, H4D7 10.8.2 N/A
AS 1668 Part 4 2012 The use of ventilation and air conditioning in buildings — Natural ventilation of buildingsF6D11 N/A N/A N/A
AS 1670 Part 1 2018 Fire detection, warning, control and intercom systems — System design, installation and commissioning — Fire (incorporating amendment 1) (See Note 3)C4D6, C4D7, C4D8, C4D9, C4D12, D3D26, E2D3, E2D10, G4D7, Spec 12, Spec 20, Spec 23, Spec 31N/A 9.5.1 N/A
AS 1670 Part 3 2018 Fire detection, warning, control and intercom systems — System design, installation and commissioning — Fire alarm monitoring (incorporating amendment 1) (See Note 3)Spec 20, Spec 23N/A N/A N/A
AS 1670 Part 4 2018 Fire detection, warning, control and intercom systems — System design, installation and commissioning — Emergency warning and intercom systems (incorporating amendment 1) (See Note 3)E3V2, E4D9, Spec 31N/A N/A N/A
AS/NZS 1680 Part 02009 Interior lighting — Safe movement F6D5 N/A 10.5.2 N/A
AS 1684 Part 2 2021 Residential timber-framed construction — Non-cyclonic areas B1D4, B1D5, F1D8H1D6 2.2.5, 4.2.13, 5.6.6,
6.2.1, 6.3.6, 7.5.2, 7.5.3, 7.5.4, 10.2.19, 10.2.20N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 194
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 1684 Part 3 2021 Residential timber-framed construction —
Cyclonic areas B1D4, B1D5, F1D8H1D6 2.2.5, 4.2.13, 5.6.6,
6.2.1, 6.3.6, 7.5.2, 7.5.3, 7.5.4, 10.2.19, 10.2.20N/A
AS 1684 Part 4 2010 Residential timber-framed construction — Simplified — Non-cyclonic areas (incorporating amendment 1)B1D4, B1D5, F1D8H1D6 2.2.5, 4.2.13, 5.6.6,
6.2.1, 7.5.2, 7.5.3, 7.5.4, 10.2.19, 10.2.20N/A
AS 1720 Part 1 2010 Timber structures — Design methods (incorporating amendments 1, 2 and 3)B1V1, B1D4 H1V1, H1D6 4.2.13, 5.3.3 N/A
AS/NZS 1720 Part 42019 Timber structures — Fire resistance of
timber elements
Spec 1 Spec 1 N/A Spec 1
AS 1720 Part 5 2015 Timber structures — Nailplated timber roof trusses (incorporating amendment 1)B1D4 H1D6 N/A N/A
AS 1735 Part 11 1986 Lifts, escalators and moving walks — Fire
rated landing doorsC4D11 N/A N/A N/A
AS 1735 Part 12 1999 Lifts, escalators and moving walks —
Facilities for persons with disabilities (incorporating amendment 1)E3D8, I2D6 N/A N/A N/A
AS/NZS 1859 Part 42018 Reconstituted wood based panels —
Specifications — Wet process fibreboardN/A N/A 7.5.3, 7.5.4 N/A
AS 1860 Part 2 2006 Particleboard flooring — Installation (incorporating amendment 1)B1D4 H1D6 N/A N/A
AS 1905 Part 1 2015 Components for the protection of openings in fire-resistant walls — Fire-resistant doorsets (incorporating amendment 1)C4D7, Spec 12 N/A N/A N/A
AS 1905 Part 2 2005 Components for the protection of openings in fire-resistant walls — Fire-resistant roller shuttersSpec 12 N/A N/A N/A
AS 1926 Part 1 2012 Swimming pool safety — Safety barriers for swimming poolsG1D2, G1D4 H7D2 N/A N/A
AS 1926 Part 2 2007 Swimming pool safety — Location of safety barriers for swimming pools (incorporating amendments 1 and 2)G1D2 H7D2 N/A N/A
AS 1926 Part 3 2010 Swimming pool safety — Water recirculation systems (incorporating amendment 1)G1D2 H7D2 N/A N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 195
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 2047 2014 Windows and external glazed doors in
buildings (incorporating amendments 1 and
2) (See Note 4)B1D4, F3V1, F3D4, J5D5H1D8, H2V1 13.4.4 N/A
AS 2049 2002 Roof tiles (incorporating amendment 1) F3D2 H1D7 N/A N/A
AS 2050 2018 Installation of roof tiles B1D4, F3D2 H1D7 7.3.2 N/A
AS 2118 Part 1 2017 Automatic fire sprinkler systems — General
systems (incorporating amendments 1 and 2)C1V3, Spec 17, Spec 18N/A N/A N/A
AS 2118 Part 4 2012 Automatic fire sprinkler systems — Sprinkler
protection for accommodation buildings not exceeding four storeys in heightSpec 17, Spec 18N/A N/A
B4D3
AS 2118 Part 5 2008 (R 2020) Automatic fire sprinkler systems - Home fire
sprinkler systemsN/A N/A N/A B4D3
AS 2118 Part 6 2012 Automatic fire sprinkler systems —
Combined sprinkler and hydrant systems in multistorey buildingsSpec 17 N/A N/A
B4D3
AS 2159 2009 Piling — Design and installation
(incorporating amendment 1)B1D4 H1D12 N/A N/A
AS/NZS 2179 Part 12014 Specifications for rainwater goods,
accessories and fasteners — Metal shape or sheet rainwater goods, and metal accessories and fastenersN/A N/A 7.4.2 N/A
AS/NZS 2269 Part 02012 Plywood — Structural — Specifications
(incorporating amendment 1)N/A N/A 7.5.4 N/A
AS/NZS 2293 Part 12018 Emergency lighting and exit signs for
buildings — System design, installation and operation (incorporating amendment 1)E4D4, E4D8, Spec 25, I3D15N/A N/A N/A
AS 2312 Part 1 2014 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings — Paint coatingsN/A N/A 6.3.9 N/A
AS/NZS 2312 Part 22014 Guide to the protection of structural steel
against atmospheric corrosion by the use of protective coatings — Hot dip galvanizingN/A N/A 6.3.9 N/A
AS/NZS 2327 2017 Composite structures — Composite steel-
concrete construction in buildings (incorporating amendment 1)B1D4,
Spec 1 Spec 1 2.2.4 Spec 1Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 196
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 2419 Part 1 2021 Fire hydrant installations — System design,
installation and commissioning C3D13, E1D2, Spec 18, I3D9 N/A N/A
B4D4
AS 2441 2005 Installation of fire hose reels (incorporating
amendment 1)E1D3 N/A N/A B4D5
AS 2444 2001 Portable fire extinguishers and fire blankets
— Selection and locationE1D14, I3D11 N/A N/A N/A
AS 2665 2001 Smoke/heat venting systems — Design,
installation and commissioningSpec 22, Spec 31N/A N/A N/A
AS 2699 Part 1 2020 Built-in components for masonry construction — Wall ties (See Note 9)C2D10 N/A 5.6.5 N/A
AS 2699 Part 3 2020 Built-in components for masonry construction — Lintels and shelf angles (durability requirements) (See Note 9)C2D10 N/A 5.6.7 N/A
AS 2870 2011 Residential slabs and footings F1D7 H1D4, H1D5 3.4.2, 4.2.2, 4.2.6,
4.2.8, 4.2.11, 4.2.14, 4.2.15, 10.2.9N/A
AS/NZS 2890 Part 62009 Parking facilities — Offstreet parking for
people with disabilitiesD4D6 N/A N/A N/A
AS/NZS 2904 1995 Damp-proof courses and flashings
(incorporating amendments 1 and 2)F1D6 N/A 5.7.3, 7.5.6, 12.3.3 N/A
AS/NZS 2908 Part 12000 Cellulose-cement products — Corrugated
sheetsB1D4 N/A N/A N/A
AS/NZS 2908 Part 22000 Cellulose-cement products — Flat sheets Schedule 1 Schedule 1 7.5.3, 7.5.4, 7.5.5,
10.2.9,10.2.10, Schedule 1Schedule 1
AS/NZS 2918 2018 Domestic solid fuel burning appliances —
Installation (See Note 8)G2D2 H7D5 12.4.4, 12.4.5 N/A
AS/NZS 3013 2005 Electrical installations — Classification of the
fire and mechanical performance of wiring system elementsC3D14 N/A N/A N/A
AS/NZS 3500 Part 02021 Plumbing and drainage — Glossary of terms
A1G4 A1G4 N/A A1G4
AS/NZS 3500 Part 12018 Plumbing and drainage — Water services N/A N/A N/A
B5D6Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 197
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS/NZS 3500 Part
12021 Plumbing and drainage — Water services N/A N/A N/A B1D3 , B1D5 ,
B1D6 , B3D3 ,
B5V1 , B5D2 ,
B5D3 , B5D4 ,
Spec 41 , B6D2 ,
B6D3 , B6D5 ,
B7D3 ,
AS/NZS 3500 Part 22021 Plumbing and drainage — Sanitary plumbing
and drainage (incorporating amendment 1)N/A N/A N/A
C1D3 , C1V1 ,
C1V2 , C1V3 ,
C1V4 , C1V5 ,
C2V2 , C2D3 ,
C2D4 , C3D7
AS/NZS 3500 Part 32021 Plumbing and drainage — Stormwater
drainage (See Note 11)F1D3 H2D2,
H2D6 7.4.3 N/A
AS/NZS 3500 Part 42021 Plumbing and drainage — Heated water
services (incorporating amendment 1)N/A N/A N/A
B2D2 , B2D6 ,
B2D7 , B2D8 ,
B2D9 , B2D11
AS 3600 2018 Concrete structures (incorporating
amendments 1 and 2)B1V1, B1D4,
Spec 1H1V1, H1D4,
Spec 13.4.2, 4.2.6, 4.2.10, 4.2.13, 5.3.3, 10.2.9 Spec 1
AS 3660 Part 1 2014 Termite management — New building work (incorporating amendment 1)B1D4, F1D6 N/A 3.4.1, 3.4.2 N/A
AS 3660 Part 3 2014 Termite management — Assessment criteria for termite management systemsN/A N/A 3.4.2 N/A
AS/NZS 3666 Part 12011 Air-handling and water systems of buildings
— Microbial control — Design, installation and commissioningF4D10, F6D6 N/A N/A N/A
AS 3700 2018 Masonry structures B1D4, F3D5,
Spec 1 , Spec 2H1D5, H2D4,
Spec 1 , Spec 25.3.3, 5.4.2, 5.6.3, 6.3.6, 10.2.9, 10.2.19, 10.2.20, 12.4.3 Spec 1 , Spec 2
AS 3740 2021 Waterproofing of domestic wet areas F2D2 H4D2, H4D3 10.2.20 N/A
AS 3786 2014 Smoke alarms using scattered light,
transmitted light or ionization (incorporating amendment 1 and 2) (See Note 5)Spec 20 N/A 9.5.1 N/A
AS/NZS 3823 Part 1.22012 Performance of electrical appliances — Air
conditioners and heat pumps — Ducted air conditioners and air-to-air heat pumps — Testing and rating for performanceSpec 33, J6D12 N/A N/A N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 198
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 3959 2018 Construction of buildings in bushfire-prone
areas (incorporating amendments 1 and 2)C2D14, F8D5,
G5D2, G5D3, Spec 43H7D4 10.8.3
B1D4 , B2D10 ,
B3D4 , C1D4 ,
C2D5
AS/NZS 4020 2018 Testing of products for use in contact with
drinking water (See Note 6)A5G4 A5G4 N/A A5G4
AS 4055 2021 Wind loads for housing Schedule 1 H1D6, H1D8,
Schedule 12.2.3, Schedule 1 Schedule 1
AS 4072 Part 1 2005 Components for the protection of openings in fire-resistant separating elements — Service penetrations and control joints (incorporating amendment 1)C4D15, C4D16 N/A 9.3.2 N/A
AS 4100 2020 Steel structures B1D4,
Spec 1 H1D6, Spec 1 4.2.13, 5.6.7 Spec 1
AS 4200 Part 1 2017 Pliable building membranes and underlays
— Materials (incorporating amendment 1)F3D3, F8D3, Spec 36, Schedule 1Schedule 1 7.3.4, 7.5.2, 7.5.8,
10.8.1, Schedule 1Schedule 1
AS 4200 Part 2 2017 Pliable building membranes and underlays
— Installation requirements (incorporating amendments 1 and 2)F3D3, F8D3 N/A 10.8.1 N/A
AS/NZS 4234 2021 Heated water systems — Calculation of
energy consumption Spec 45 N/A N/A
B2D2
AS 4254 Part 1 2021 Ductwork for air-handling systems in buildings — Flexible ductSpec 7, J6D7 H3D2 13.7.4 N/A
AS 4254 Part 2 2012 Ductwork for air-handling systems in buildings — Rigid ductSpec 7, J6D5, J6D7N/A 13.7.4 N/A
AS/NZS 4284 2008 Testing of building facades F3V1 H2V1 N/A N/A
AS/NZS 4505 2012 Garage doors and other large access doors
(incorporating amendment 1)B1D4 N/A 2.2.4 N/A
AS 4552 2005 Gas fired water heaters for hot water supply
and/or central heatingN/A N/A N/A
B2D2
AS 4586 2013 Slip resistance classification of new
pedestrian surface materials (incorporating amendment 1) (See Note 7)D3D11, D3D14, D3D15. Spec 27N/A 11.2.4 N/A
AS 4597 1999 Installation of roof slates and shingles (Non-
interlocking type)B1D4, F3D2 H1D7 N/A N/A
AS/NZS 4600 2018 Cold-formed steel structures B1D4,
Spec 1 H1D6, Spec 1 5.3.3, 6.3.6 Spec 1Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 199
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AS 4654 Part 1 2012 Waterproofing membranes for external
above-ground use — MaterialsF1D5 H2D8 N/A N/A
AS 4654 Part 2 2012 Waterproofing membranes for external above-ground use — Design and installationC2D14, F1D4, F1D5H2D8 N/A N/A
AS 4678 2002 Earth-retaining structures N/A H1D3 N/A N/A
AS 4773 Part 1 2015 Masonry in small buildings — Design
(incorporating amendment 1)N/A H1D5, H2D4 5.6.3, 12.4.3 N/A
AS 4773 Part 2 2015 Masonry in small buildings — Construction (incorporating amendment 1)N/A H1D5, H2D4 5.6.3, 12.4.3 N/A
AS/NZS 4859 Part 12018 Thermal insulation materials for buildings —
General criteria and technical provisionsJ4D3, J6D6, J6D9N/A 13.2.2, 13.7.2, 13.7.4 N/A
AS/NZS 4859 Part 22018 Thermal insulation materials for buildings —
DesignJ3D8, J4D3, Spec 36, Spec 37N/A 13.2.5, 13.2.6 N/A
AS/NZS 4858 2004 Wet area membranes N/A N/A 10.2.8 N/A
AS 5113 2016 Classification of external walls of buildings
based on reaction-to-fire performance (incorporating amendment 1)C1V3 N/A N/A N/A
AS 5146 Part 1 2015 Reinforced autoclaved aerated concrete — Structures (incorporating amendment 1)B1D4 H1D7 N/A N/A
AS 5146 Part 3 2018 Reinforced autoclaved aerated concrete — Construction B1D4, F3D5 N/A N/A N/A
AS 5216 2021 Design of post-installed and cast-in
fastenings in concreteB1D4 N/A 2.2.4 N/A
AS/NZS 5601 Part 1 2013 Gas installations — General installations J1V4 H6V3 N/A N/A
AS 5637 Part 1 2015 Determination of fire hazard properties — Wall and ceiling liningsSpec 7, Schedule 1Schedule 1 Schedule 1 Schedule 1
AS ISO 9239 Part 1 2003 Reaction to fire tests for floorings — Determination of the burning behaviour using a radiant heat sourceSchedule 1 Schedule 1 Schedule 1 Schedule 1
AS/NZS ISO 9972 2015 Thermal performance of buildings — Determination of air permeability of buildings — Fan pressurization methodJ1V4 H6V3 N/A N/A
AIRAH-DA07 2021 Criteria for moisture control design analysis
in buildingsF8V1 H4V5 N/A N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 200
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
AIRAH-DA09 1998 Air conditioning load estimation Spec 35 N/A N/A N/A
AIRAH-DA28 2011 Building management and control systems Spec 34 N/A N/A N/A
ANSI/ASHRAE
Standard 552013 Thermal environmental conditions for human
occupancySchedule 1 Schedule 1 Schedule 1 Schedule 1
ANSI/ASHRAE Standard 1402007 Standard method of test for the evaluation of
building energy analysis computer programsJ1V1, J1V2, J1V3, J1V5H6V2 N/A N/A
ASTM E2073-10 2010 Standard Test Method for Photopic
Luminance of Photoluminescent (Phosphorescent) MarkingsSpec 25 N/A N/A N/A
ASTM E72-15 2015 Standard Test Methods of Conducting
Strength Tests of Panels for Building ConstructionSpec 6 N/A N/A N/A
ASTM E695-03 2003 Standard Test Method of Measuring Relative
Resistance of Wall, Floor and Roof Construction to Impact LoadingSpec 6 N/A N/A N/A
ASTM E96 2016 Standard Test Methods for Water Vapor
Transmission of MaterialsSchedule 1 Schedule 1 Schedule 1 Schedule 1
AHRI 460 2005 Performance rating of remote mechanical-
draft air-cooled refrigerant condensersJ6D13 N/A N/A N/A
AHRI 551/591 2015 Performance rating of water-chilling and heat
pump water-heating packages using the vapor compression cycle.Spec 33, J6D11 N/A N/A N/A
ABCB 2022 Fire Safety Verification Method
C1V4 N/A N/A N/A
ABCB 2022 Housing Provisions Standard N/A Throughout Throughout N/A
ABCB 2022 Livable Housing Design G7D2 H4D3 , H8D2 3.3.3 , 11.2.3 N/A
ABCB 2011 Protocol for Structural Software, Version
2011.2B1D5 H1D6 2.2.5 N/A
ABCB 2012 Standard for Construction of Buildings in
Flood Hazard Areas, Version 2012.3B1D6 H1D10 N/A N/A
ABCB 2022 Standard for NatHERS Heating and Cooling
Load Limits, Version 2022.1J3D3 Spec 42 N/A N/A
ABCB 2022 Standard for Whole-of-Home Efficiency
FactorsJ3D14 N/A 13.6.2 N/A
CIBSE Guide A 2015 Environmental design Spec 34, Spec
35, J4D3, J4D7N/A N/A N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 201
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
N/A 2002 Disability Standards for Accessible Public
TransportF4D12, I2D1 N/A N/A N/A
N/A 2010 Education and Care Services National Law
Act (Vic)Schedule 1 Schedule 1 Schedule 1 Schedule 1
European Union
Commission Regulation 547/20122012 Eco-design requirements for water pumps J6D8 N/A N/A N/A
European Union Commission Regulation 622/Annexx II, point 22012 Eco-design requirements for glandless
standalone circulators and glandless circulators integrated in productsJ6D8 N/A N/A N/A
FPAA101D 2021 Automatic Fire Sprinkler System Design and
Installation — Drinking Water SupplyC1V3, C2D6, C2D13, C3D2, C3D7, C3D8, C4D6, C4D7, C4D8, C4D9, C4D12, Spec 5, Spec 7, D2D4, D2D17, D3D26, D3D30, E2D8, E2D9, E2D13, E2D14, E2D15, E2D16, E2D17, E2D19, E2D20, Spec 17, Spec 18, Spec 20, G3D1, G3D6, Spec 31, I1D2, Schedule 1Schedule 1 Schedule 1
B4D3 , Schedule
1, B1D5Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 202
(1 May 2023)
No. Date Title Volume One Volume Two Housing Provisions Volume Three
FPAA101H 2018 Automatic Fire Sprinkler System Design and
Installation — Hydrant Water Supply
(incorporating amendment 1)C1V3, C2D6, C2D13, C3D2, C3D7, C3D8, Spec 5, Spec 7, Spec 17, Spec 18, E2D8, E2D9, E2D13, E2D14, E2D15, E2D16, E2D17, E2D19, E2D20, Spec 20, G3D1, G3D6, Spec 31, I1D2N/A N/A
B4D3
ISO 140 Part 6 1998E Acoustics — Measurement of sound
insulation in buildings and of building elements — Laboratory measurements of impact sound insulation of floorsSpec 29 N/A N/A N/A
ISO 540 2008 Hard coal and coke — Determination of ash
fusibilitySpec 13 N/A N/A N/A
ISO 8336 1993E Fibre-cement flat sheets Schedule 1 Schedule 1 7.5.3, 7.5.4, 7.5.5,
Schedule 1Schedule 1
ISO 25745 Part 2 2015 Energy performance of lifts, escalators and
moving walks: Energy calculation and classification for lifts (elevators)J7D8 N/A N/A N/A
NASH Standard 2021 Steel Framed Construction in Bushfire Areas N/A H7D4 N/A N/A
NASH Standard
Part 12005 Residential and Low Rise Steel Framing —
Design Criteria (incorporating amendments A, B and C)B1D4 H1D6 N/A N/A
NASH Standard Part 22014 Residential and Low Rise Steel Framing —
Design Solutions (incorporating amendment A) B1D4, B1D5, F1D8H1D6 2.2.5, 6.2.1, 6.3.6,
7.5.2, 7.5.3, 7.5.4, 10.2.19, 10.2.20N/A
NSF/ ANSI/ CAN 3722020 Drinking Water System Components - Lead
Content
A5G4 A5G4 N/A A5G4
N/A N/A Northern Territory Deemed to Comply Standards ManualN/A N/A 2.2.4 N/A
SA TS 5344 2019 Permanent labelling for Aluminium Composite Panel (ACP) products
A5G8 A5G8 N/A A5G8
TN 61 N/A Cement Concrete and Aggregates Australia — Technical note — Articulated wallingN/A H1D4 N/A N/AReferenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 203
(1 May 2023)
T
able Notes
For AS/NZS ISO 717.1:(1)
Test reports based on AS 1276—1979 and issued prior to AS/NZS 1276.1—1999 being referenced in the NCC remain valid.(a)
The STC values in reports based on AS 1276—1979 must be considered to be equivalent to Rw values.(b)
Test reports based on AS/NZS 1276.1 prepared after the NCC reference date for AS/NZS 1276.1—1999 must be based on that version.(c)
Test reports based on ISO 717-1—1996 and issued prior to AS/NZS ISO 717.1—2004 being referenced in the NCC remain valid.(d)
Reports based on AS/NZS ISO 717.1 relating to tests carried out after the NCC reference date for AS/NZS ISO 717.1—2004 must relate to the amended(e)
Standard.
For AS 1562.1, tests carried out based on AS 1562.1—1992 and issued prior to AS 1562.1—2018 being referenced in the NCC remain valid. Reports relating to(2)
tests carried out after the NCC reference date for AS 1562.1 must relate to the revised Standard.
For AS 1670.1, AS 1670.3 and AS1670.4, notwithstanding A4G1(5) , until the adoption of NCC 2025 the editions of the documents listed in Table 1.8 of AS 1670.1, (3)
AS 1670.3 and AS 1670.4 may be used to meet the requirements of AS 1670.1, AS 1670.3 and AS 1670.4 as applicable.
For AS 2047:(4)
Tests carried out under earlier editions of AS 2047 remain valid.(a)
Reports based on AS 2047 relating to tests carried out after the NCC reference date for AS 2047—2014 Amendment 2 must relate to the amended Standard.(b)
For AS 3786:(5)
Tests carried out under AS 3786—2014 Amendment 1 remain valid.(a)
Reports based on AS 3786 relating to tests carried out after the NCC reference date for AS 3786—2014 Amendment 2 must relate to the amended Standard.(b)
Test reports based on the 2005 edition of AS/NZS 4020 will continue to be accepted until 1 May 2024. Test reports prepared afte r the NCC reference date for the (6)
2018 edition of AS/NZS 4020 must be based on the 2018 edition.
For AS 4586:(7)
Test reports based on the 2004 edition of AS/NZS 4586 and issued prior to the 2013 edition of AS 4586 being referenced in the NCC remain valid.(a)
Test reports prepared after the NCC reference date of the 2013 edition of AS 4586 must be based on that version.(b)
For the purposes of assessing compliance, the slip-resistance classifications of V, W and X in reports based on the 2004 edition of AS/NZS 4586 may be(c)
considered to be equivalent to slip-resistance classifications of P5, P4 and P3 respectively in the 2013 edition of AS 4586.
Test reports based on Appendix D of AS 4586—2013 and issued prior to the NCC reference date for AS 4586—2013 (incorporating Ame ndment 1) remain (d)
valid.
Test reports based on Appendix D of AS 4586—2013 and prepared after the NCC reference date for AS 4586—2013 (incorporating Amendment 1) must be(e)
based on that version.No. Date Title Volume One Volume Two Housing Provisions Volume Three
WMK NOD
2021/4.22021 WaterMark Notice of Direction 2021/4.2
Certification transition arrangements for lead free plumbing productsA5G4 A5G4 N/A A5G4Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 204
(1 May 2023)
Tests carried out based on AS/NZS 2918—2001 and issued prior to AS/NZS 2918—2018 being referenced in the NCC remain valid. Repo rts relating to tests (8)
carried out after the NCC reference date for AS/NZS 2918 must relate to the revised Standard.
For AS 2699 Parts 1 and 3:(9)
For AS 2699.1, the 2000 edition has been retained for a transitional period ending on 30 April 2025.(a)
For AS 2699.3, the 2002 edition has been retained for a transitional period ending on 30 April 2025.(b)
For AS 1397, the 2011 edition has been retained for a transitional period ending on 31 August 2023. (10)
For AS/NZS 3500.3, the 2018 edition has been retained for a transitional period ending on 31 August 2023. (11)Referenced documents
NCC 2022 Volume Three - Plumbing Code of Australia Page 205
(1 May 2023)
Page 206NSW Table 1
NT Table 1
QLD Table 1 SA Table 1 TAS Table 1 VIC Table 1 WA Table 1
(1 May 2023)
NCC 2022 Volume Three - Plumbing Code of Australia
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 207Schedule 3 Commonwealth of Australia
Footnote: Other legislation affecting buildings
(1 May 2023)
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 208In addition to any applicable provisions of this Code, there are a number of other legislative technical requirements and
policies af
fecting the design, construction and/or performance of buildings that practitioners may need to be aware of,
including, but not necessarily limited to, the following list. Additional legislative instruments such as regulations, codes an d
standards may exist under the legislation listed.
1. Aged Care Buildings
Administering Agency
Department of Health and Aged Care
Relevant Legislation
Aged Care Act 1997
2. Australian Capital Territory
Administering Agency
Department of Finance, section 27 insofar as it relates to the declaration of land in the Australian Capital Territory to be
National Land where the land is required for Commonwealth purposes other than for the special purposes of Canberra as
the National Capital.
Department of Infrastructure, Transport, Regional Development, Communications and the Arts, except to the extent
administered by the Minister for Finance
Relevant Legislation
National Capital Plan (established under the Australian Capital Territory (Planning and Land Management) Act 1988)
Administering Agency
Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Relevant Legislation
Parliament Act 1974
Australian Capital Territory National Land (Leased) Ordinance 2022
Australian Capital Territory National Land (Unleased) Ordinance 2022
3. Indian Ocean Territories
Administering Agency
Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Relevant Legislation
Christmas Island Act 1958
Cocos (Keeling) Islands Act 1955
4. Communications and Information Technology
Administering Agency
Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Relevant Legislation
Australian Postal Corporation Act 1989 Footnote: Other legislation affecting buildings
(1 May 2023)
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 209National Transmission Network Sale Act 1998
Telecommunications Act 1997
Telstra Corporation Act 1991
Telecommunications (Consumer Protection and Service Standards) Act 1999
Relevant Policy
Telecommunications Infrastructure in New Developments (TIND) policy
5. Defence Buildings
Administering Agency
Department of Defence
Relevant Legislation
Defence Act 1903
Relevant Regulations
Defence Regulation 2016, Part 11A
Relevant Codes, Standards and Publications
Manual of Fire Protection Engineering
Building Works Manual
Manual of Infrastructure Engineering - Electrical
The Defence Estate Quality Management System (DEQMS) https://www.defence.gov.au/EstateManagement/
6. Disability Discrimination
Administering Agency
Attorney-General’s Department
Relevant Legislation
Disability (Access to Premises - Buildings) Standards 2010
Disability Discrimination Act 1992
Disability Standards for Accessible Public Transport 2002
Disability Standards for Education 2005, noting this:
does not affect the application of premises standards to building work (including construction of a new building) •
undertaken as an adjustment or part of an adjustment; and
does not require the building work to meet specifications more onerous than those required by the premises standards. •
7 . Environment
Administering Agency
Department of Climate Change, Energy, the Environment and Water
Relevant Legislation
Environmental Protection and Biodiversity Conservation Act 1999
Environment Protection and Biodiversity Conservation Regulations 2000
Relevant Policy
Energy Efficiency in Government Operations (2007)
(1 May 2023)
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 210Significant impact guidelines – matters of national environmental significance
8. Federal Airports
Administering Agency
Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Relevant Legislation
Airports Act 1996
Airports Regulations 1997
Airports (Building Control) Regulations 1996
Airports (Control of On-Airport Activities) Regulations 1997
Airports (Environmental Protection) Regulations 1997
Airports (Protection of Airspace) Regulations 1996
9. Jervis Bay Territory
Administering Agency
Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Relevant Legislation
Jervis Bay Territory Acceptance Act 1915
10. Occupational Health and Safety
Administering Agency
Department of Employment and Workplace Relations
Relevant Legislation
Work Health and Safety Act 2011 Work Health and Safety Regulations 2011
11. Australian Antarctic Territory
Administering Agency
Department of Climate Change, Energy, the Environment and Water (Australian Antarctic Division)
Relevant Legislation
Antarctic Treaty (Environment Protection) Act 1980
Antarctic Treaty (Environment Protection) (Environmental Impact Assessment) Regulations 1993
Antarctic Treaty (Environment Protection) (Waste Management) Regulations 1994
Environment Protection and Biodiversity Conservation Act 1999
Environment Protection and Biodiversity Conservation Regulations 2000
12. Territory of Heard Island and McDonald Islands
Administering Agency
Department of Climate Change, Energy, the Environment and Water (Australian Antarctic Division)
(1 May 2023)
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 211Relevant Legislation
Environment Protection and Management Ordinance 1987 (HIMI)
Environment Protection and Biodiversity Conservation Act 1999
Heard Island and McDonald Islands Marine Reserve management plan in operation under the Environment Protection
and Biodiversity Conservation Act 1999
Environment Protection and Biodiversity Conservation Regulations 2000
13. National or World Heritage Places
Administering Agency
Department of Climate Change, Energy, the Environment and Water
Relevant Legislation
Environment Protection and Management Ordinance 1987 (HIMI)
Antarctic Treaty (Environment Protection) (Environmental Impact Assessment) Regulations 1993
Environment Protection and Biodiversity Conservation Act 1999
Heard Island and McDonald Islands Marine Reserve management plan in operation under the Environment Protection
and Biodiversity Conservation Act 1999
Environment Protection and Biodiversity Conservation Regulations 2000
14. National Parks
Administering Agency
Director of National Parks, Climate Change, Energy, the Environment and Water Portfolio
Relevant Legislation
Commonwealth Reserve management plans in operation under the Environment Protection and Biodiversity Conservation
Act 1999
Environment Protection and Biodiversity Conservation Act 1999
Environment Protection and Biodiversity Conservation Regulations 2000
15. Commonwealth funding for building work
Administering Agency
Department of Employment and Workplace Relations
Australian Building and Construction Commission (ABCC)
Office of the Federal Safety Commissioner (OFSC)
Relevant Legislation
Building and Construction Industry (Improving Productivity) Act 2016 (BCIIP Act) (See Notes 1, 2 and 3)
Code for the Tendering and Performance of Building Work 2016 (Building Code 2016) •
Building and Construction (Improving Productivity) (Accreditation Scheme) Rules 2019 (WHS Accreditation Scheme) •
Building and Construction Industry (Improving Productivity) (Federal Safety Officers) General Directions 2017 •
16. Commonwealth buildings
Administering Agency
Department of Employment and Workplace Relations
(1 May 2023)
Commonwealth of Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 212Office of the Federal Safety Commissioner
Relevant Legislation
Building and Construction Industry (Improving Productivity) Act 2016 (BCIIP Act) (See Notes 1, 2 and 3)
Building and Construction (Improving Productivity) (Accreditation Scheme) Rules 2019
Building and Construction Industry (Improving Productivity) (Federal Safety Officers) General Directions 2017
Notes
The BCIIP Act is concerned with the regulation of Workplace Relations in the building industry, it also establishes the (1)
Australian Building and Construction Commission (ABCC) (as the workplace relations regulator for the industry) and
the Of
fice of the Federal Safety Commissioner (OFSC).
The BCIIP
Act legislates additional requirements for those building contractors undertaking Commonwealth funded (
2)
building work through the Building Code 2016, regulated by the ABCC, and the Work Health and Safety Accreditation
Scheme (WHS
Accreditation Scheme), administered by the OFSC. Of direct relevance to the NCC: Provisions in BCIIP
Act include a requirement that the Federal Safety Commissioner audits building contractors’
compliance with the NCC
in relation to building materials, which is a condition of accreditation under the WHS
Accreditation Scheme.
The
Australian Government has committed to abolish the ABCC and the Building Code 2016. To achieve this, the (
3)
Government has introduced the Fair Work Legislation Amendment (Secure Jobs, Better Pay) Bill 2022 (the Bill) which
would repeal provisions of the BCIIP
Act that provide for the ABCC and the Building Code 2016. The Bill would also
retain provisions of the BCIIP
Act that provide for the OFSC and the WHS Accreditation Scheme in a renamed Act,
the Federal Safety Commissioner
Act 2022. Builders undertaking Commonwealth-funded building work would still be
required to comply with the NCC.
(1 May 2023)
Australian Capital Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 213
Schedule 4 Australian Capital Territory
Introduction
Footnote: Other legislation affecting water and plumbing systems
(1 May 2023)
Australian Capital Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 214The
Australian Capital Territory Appendix to the Plumbing Code of Australia (PCA) forms part of the ACT Plumbing Code
in accordance with the Water and Sewerage Act 2000. The ACT Appendix contains variations and additions to the PCA
that apply to plumbing and drainage work undertaken in the ACT and information about the application of the PCA in the
ACT. The ACT Appendix is notified on the ACT Legislation Register and can be found at
https://www.legislation.act.gov.au/a/2000-68/ under the Regulations and Instruments tab.
While some ACT-specific clauses are flagged in the text of the PCA, others may not be. Users of the PCA should confirm
they are using the version of the ACT Appendix currently in force and are applying all relevant variations and additions.
Historical versions of the ACT Appendix are also available on the register.ACT Introduction
(1 May 2023)
Australian Capital Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 215In addition to any applicable provisions of the Building
Act 2004 and this Code, there are other legislative technical
requirements affecting the design, construction and/or performance of buildings that practitioners may need to be aware
of. A list of relevant legislation and links to where it can be found on the ACT Legislation Register can be found in the ACT
Appendix at https://www.legislation.act.gov.au/a/2004-11/ under the Regulations and Instruments tab.
In addition to this Code, there are a number of other legislative technical requirements affecting the design, construction,
installation, replacement, repair, alteration and maintenance of water and plumbing systems that practitioners may need
to be aware of including, but not necessarily limited to, the following list.
1. Plumbing and Drainage
Administering Agency
Environment, Planning and Sustainable Development Directorate
Chief Minister, Treasury and Economic Development Directorate (regulator)
Relevant Legislation
Water and Sewerage Act 2000
2. Building
Administering Agency
Environment, Planning and Sustainable Development Directorate
Chief Minister, Treasury and Economic Development Directorate (regulator)
Relevant Legislation
Building Act 2004
3. Health
Administering Agency
ACT Health Directorate
Canberra Health Services
Relevant Legislation
Health Act 1993
4. Environment
Administering Agency
Environment, Planning and Sustainable Development Directorate
Relevant Legislation
Environment Protection Act 1997
5. Gas
Administering Agency
Environment, Planning and Sustainable Development Directorate
Chief Minister, Treasury and Economic Development Directorate (regulator) ACT Footnote: Other legislation affecting water and plumbing systems
(1 May 2023)
Australian Capital Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 216Relevant Legislation
Gas Safety Act 2000
6. Electrical
Administering Agency
Environment, Planning and Sustainable Development Directorate
Chief Minister, Treasury and Economic Development Directorate (regulator)
Relevant Legislation
Electricity Safety Act 1971
7 . Utilities
Administering Agency
Environment, Planning and Sustainable Development Directorate
Justice and Community Safety Directorate
Transport Canberra and City Services Directorate
Chief Minister, Treasury and Economic Development Directorate (regulator)
Relevant Legislation
Utilities Act 2000
8. Planning
Administering Agency
Environment, Planning and Sustainable Development Directorate
Relevant Legislation
Planning and Development Act 2007
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 217Schedule 5 New South Wales
Section A Governing requirements
Part A6 Building classification
NSW A6G7 Class 6 buildings
Section B Water services
Part B1 Cold water services
NSW B1D3 General requirements
Part B2 Heated water services
NSW B2D2 Water heater in a heated water supply system
NSW B2D5 Maximum delivery temperature
NSW B2D6 Temperature control devices
Part B3 Non-drinking water services
NSW B3D3 General requirements
Part B5 Cross -connection control
NSW B5D6 Rainwater
NSW B5D7 Cooling tower water service
NSW Part B4 Fire-fighting water services
Section C Sanitary plumbing and drainage systems
Part C2 Sanitary drainage systems
NSW C2D4 General requirements
NSW Part C3 On-site wastewater management
Schedule 1 Definitions
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 218 Part A6 Building classification
Delete A6G7 and insert NSW A6G7 as follows:
NSW A6G7 Class 6 buildings
[2019: NSW A6.6]
A Class 6 building is a shop or other building for sale of goods by retail or the supply of services direct to the public,
including—
an eating room, cafe, restaurant, milk or soft drink bar; or (
a)
a dining room, bar, shop or kiosk part of a hotel or motel; or (
b)
a hairdresser’s or barber’s shop, public laundry, or undertaker’s establishment; or (
c)
market or sale room, showroom, or service station ; or ( d)
small live music or arts venue . (e)Section A Governing requirements
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 219 Part B1 Cold water services
Delete B1D3 and insert NSW B1D3 as follows:
NSW B1D3 General requirements
[2019: NSW B1.4(1)]
A cold water service must be in accordance with AS/NZS 3500.1, with the following additions to clause 5.4.2: (l) Where
valves are located below ground within the property boundary, they shall be provided with a surface box and riser. The
box lid shall be permanently marked with a “W”.
Part B2 Heated water services
Delete B2D2 and insert NSW B2D2 as follows:
NSW B2D2 Water heater in a heated water supply system
This clause has deliberately been left blank.
Compliance is not required with the national provisions of B2D2 as the sources of energy for new Class 1 and 10
buildings are regulated under BASIX.
Delete B2D5 and insert NSW B2D5 as follows:
NSW B2D5 Maximum delivery temperature
[2019: NSW B2.5 (a)(iv)]
The delivery temperature of heated water at the outlet of each sanitary fixture must be—
not more than 45°C in any— (
a)
residential part of an aged care building ; or ( i)
patient care area in a health-care building ; or ( ii)
part of an early childhood centre , or primary or secondary school, that is used by children; or ( iii)
any facility designated for use by people with a disability; or (
iv)
not more than 50°C in all other cases. (
b)
Applications
B2D5 applies to all heated water installations for personal hygiene purposes.
Delete B2D6 and insert NSW B2D6 as follows:
NSW B2D6 Temperature control devices
[2019: NSW B2.6(2)( d), Application 1 and Exemption 1]
(1) A temperature control device used to deliver heated water in accordance with B2D5(a) must be a—
thermostatic mixing valve; or (
a)
thermostatically controlled tap. (
b)
(2) A temperature control device used to deliver heated water in accordance with B2D5(b) must be a—
thermostatic mixing valve; or (
a)
thermostatically controlled tap; or (
b)Section B Water services
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 220tempering valve; or (c)
temperature limited water heater with a maximum delivery temperature of 50°C marked in accordance with AS (d)
3498.
(3) The required maximum delivery temperature must be achieved in accordance with AS/NZS 3500.4.
Applications
B2D6 only applies to—
all new heated water services; or (a)
replacing a hot water heater, regardless of the type or location of the heater. (b)
Exemptions
A temperature control device need not be installed if one or more, but not all, heating units in a manifold water heater
are replaced.
Part B3 Non -drinking wat er services
Delete B3D3 and insert NSW B3D3 as follows:
NSW B3D3 General requirements
[2019: NSW B3.3]
A non-drinking water service must be in accordance with AS/NZS 3500.1 with the following additions to clause 10.3—
10.3(d): Top up from a drinking water supply shall be by an indirect trickle top up with a visible air gap external (a)
to the tank; and
10.3(e): There shall be no connection between treated greywater systems and drinking water , rainwater or other (b)
sources of supply.
Part B5 Cross -connection contr ol
Delete B5D6 and insert NSW B5D6 as follows:
NSW B5D6 Rainwater
[New for 2022]
Drinking water and non-drinking water must:
be zone protected from above ground , buried or partially buried rainwater tank in Class 1 buildings, utilising a (a)
non-testable device; or
comply with AS/NZS 3500.1 (2018) Clause 16.4 and Table 16.4 for all other building classes. (b)
Applications
B5D6 applies to scenarios not covered by S41C6(1)(b) .
Insert NSW B5D7 as follows:
NSW B5D7 Cooling tower water service
[2019: NSW B5.501]
Water systems permanently attached to cooling towers backflow prevention shall be positioned so that—
cooling tower air gap must be measured from the rim of the cooling tower basin; and (a)
if a drinking water service to the cooling tower passes through the basin, the service pipe must be provided with (b)NSW B2D6
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 221a double wall protection; and
if a fast fill connection is required, the fast fill line shall terminate externally to the unit, with an air gap over either (
c)
the basin or a tundish.
Notes
See NSW Figure B5D7 for typical cooling tower connections.
Insert NSW Figure B5D7 as follows:
NSW Figure B5D7 :Typical cooling tower service
Figur
e Notes
Note 1.
Refer to AS/NZS 3500.1 Part 1 Table 4.6.3.2 Hose tap for
washing downWhere a fast connection isrequired, the fast fill line shallterminate external to the unitwith an air gap either
a. directly over the basin orb. tundish
Air gap minimum 2 times thediameter of drinking water supply unit
Hose connection vacuum breaker
.
Where chemical injection is used a higher degreeof protection is required in accordance withAS/NZS 3500.1Coolingtower basin
OverflowCooling tower
BleedofflineStoptap
Stop
tap
Flow
DrainRim of coolingtower basin
Air gap min 150mmAir gapSee Note 1 Spill levelNSW B5D7
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 222Introduction to this Part
Part B4 does not apply in New South Wales.
Notes
This Part does not apply in New South Wales as fire-fighting water services are regulated under the Environmental
Planning and Assessment Act 1979 and Environmental Planning and Assessment Regulation 2000, which references
the Building Code of Australia. NSW Part B4 Fire-fighting water services
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 223
Part C2 Sanitary drainage systems
Delete C2D4 and insert NSW C2D4 as follows:
NSW C2D4 General requirements
[2019: NSW C2.4]
A sanitary drainage system must be in accordance with AS/NZS 3500.2 with the following variations:
For clause 4.3.1 insert (i) as follows: Must not have DN40 or DN50 traps installed. (a)
For clause 4.4.1 insert the following as the second paragraph: Boundary trap or inspection shafts cannot (b)
terminate within areas of buildings as defined in the NCC as a habitable room . See NCC “Definitions” and delete
‘but’ from (a) and replace with ‘,” and delete ‘excludes’ from (b).
After clause 4.5.2(b) insert (c) as follows: Soil and waste stacks shall not discharge through a reflux valve except (c)
where a reflux valve is installed at the connection to the sewer required with surcharging sewers.
Substitute clause 4.5.3 as follows: Where a surcharge is likely to occur and a reflux valve is to be installed, it (d)
shall be located in accordance with (i) and (ii) as follows:
Where the drain has an inspection shaft or boundary trap, the reflux valve shall be located immediately (i)
downstream from and adjacent to the outlet of the shaft or trap.
The invert of the outlet of the reflux valve shall be installed a minimum of 80 mm higher than the invert of (ii)
the Network Utility Operator’s system it is connected to. See NSW Figures C2D4a and C2D4b .
After clause 4.7.1(h) insert (i) as follows: At each branch off a main line internal of the building connecting one (e)
or more water closets or slop hoppers. In these cases. inspection openings must be raised to finished surface
level in an accessible position and sealed with an airtight cover. If access to the under floor area is more than
600 mm above the inspection opening, the riser may be omitted.
After clause 12.7(g) insert (h) as follows: Sewage management facilities shall be accredited by NSW Health and (f)
comply with local government requirements. Before a connection is made to pump raw sewage or effluent from
a septic tank or holding well to the Network Utility Operator’s sewer, an application must be made to that Network
Utility Operator . Applicants must meet the pump to sewer requirements and conditions for all connections to the
sewer. A marker tape must be laid along the top of all pump discharge or rising mains pipes at intervals of not
more than 3 m.
Insert NSW Figure C2D4a as follows:
NSW Figure C2D4a: Reflux valves - diagram 1
Section C Sanitary plumbing and drainage systems
Reflux (Surcharge) Valve
Inspection Opening
Sewer
Main80 mmFlow
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 224Insert NSW Figure C2D4b as follows:
NSW Figure C2D4b: Reflux valves - diagram 2
Notes
Where a reflux valve is installed the valve remains the responsibility of the property owner. Reflux (Surcharge) Valve Sealed Vertical
Sewer
Main80 mmFlowNSW C2D4
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 225Introduction to this Part
This Part sets out the requirements for any part of an on-site wastewater management system from the point of connection
of a sanitary drainage system up to and including the appropriate means of waste disposal.
In New South Wales On-site wastewater management systems are not the responsibility of the plumbing regulator.
For sewerage management facilities which treat sewerage of a domestic nature from premises occupied by a maximum
of 10 persons or where the average daily flow of sewerage is less than 2000 litres, the facility must be accredited by the
NSW Ministry of Health in accordance with Local Government (General) Regulation 2005.
Information on on-site single domestic wastewater management and accreditation guidelines can be found on the following
website: https://www.health.nsw.gov.au/environment/domesticwastewater
For land application areas the regulatory authority for land application systems is the local government (Council) and most
local governments have a sewerage management strategy or policy. A list of NSW local governments may be found here;
https://www.olg.nsw.gov.au/public/local-government-directoryNSW Part C3 On-site wastewater management
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 226
Aisle: A walkway at the end of rows of seating, not being continental seating , leading to a cross-over or to an egress
doorway.
Appropriate authority
The relevant authority with the responsibility to determine the particular matter.
Assembly building
A building where people may assemble for—
civic, theatrical, social, political or religious purposes including a library, theatre, public hall or place of worship; (a)
or
educational purposes in a school , early childhood centre , preschool, or the like; or (b)
entertainment, recreational or sporting purposes including— (c)
a cinema; or (i)
a sports stadium, sporting or other club; or (ii)
transit purposes including a bus station, railway station, airport or ferry terminal. (d)
Auditorium: A part of an entertainment venue used or intended to be used for the purposes of accommodating an
audience to an entertainment.
Continental seating: Rows of seating in which the rows extend the full width of an auditorium without intervening aisles .
Cross-over: In relation to an entertainment venue or temporary structure , means a walkway between aisles or between
an aisle and an egress doorway.
Designated bushfire prone area
Land that:
has been designated under legislation; or (a)
has been identified under an environmental planning instrument, development control plan or in the course of (b)
processing and determining a development application,
as land that can support a bushfire or is likely to be subject to bushfire attack.
Development consent: Is as defined in the Environmental Planning and Assessment Act 1979.
Entertainment venue: Is as defined in the Environmental Planning and Assessment Regulation 2021.
Film: A cinematograph film of a size of 35 mm or greater.
Flying scenery: Scenery of a kind that is lifted above the stage floor by means of lines run from a grid.
Garage top dwelling: A Class 1a dwelling located above a Class 10a private garage which is not associated with that
Class 1a dwelling and includes any internal entry stair serving the garage top dwelling.
Grid: A framework from which lines are run for the purpose of lifting flying scenery above the stage floor.
Information and education facility: Is as defined in the Standard Instrument—Principal Local Environment Plan.
Licensed premises: Is as defined in the Liquor Act 2007.
Minimum lateral clearance: A permanently unobstructed space having a height above floor level of not less than 2000
mm and a width of not less than the specified measurement.
Planning for Bush Fire Protection: Is as prescribed by the Environmental Planning and Assessment Regulation 2021.
Projection suite: Such part of an entertainment venue as is designed to accommodate apparatus used for projecting
films.
Row: A row of seating—
between a wall or other barrier and an aisle; or (a)
between 2 aisles . (b)
Small live music or arts venue: The whole or part of a building— Schedule 1 Definitions
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 227in which cultural activities including live music, visual arts’ displays, dancing, poetry and spoken word ( a)
performances are provided to the public; and
that has a floor area of not more than 300 square metres; and ( b)
that has a rise in storeys of not more than 2; and ( c)
that occupies not more than 2 storeys including the ground floor storey ; and ( d)
where pyrotechnics or theatrical smoke (smoke machines, hazers or the like) are not used. (
e)
Spa pool: Is as defined in the Swimming Pools Act 1992.
Special fire protection purpose: (As per
Section 100
B(6) of the Rural Fires Act 1997) means any of the followingpurposes:
a school, (
a)
a child care centre, (
b)
a hospital (including a hospital for the mentally ill or mentally disordered), (
c)
a hotel, motel or other tourist accommodation, (
d)
a building wholly or principally used as a home or other establishment for mentally incapacitated persons, (
e)
seniors housing within the meaning of State Environmental Planning Policy (Housing for Seniors or People with (
f)
a Disability) 2004 (now SEPP (Housing) 2021),
a group home within the meaning of State Environmental Planning Policy No 9 - Group Homes (now SEPP (
g)
(Housing) 2021),
a retirement village, (
h)
any other purpose prescribed by the regulations (Rural Fires Regulation 2022). (
i)
Notes
For application of this definition in the BCA, the term “school” does not include a college, university or similar tertiary
educational establishment.
Temporary structure: Either—
a booth, tent or other temporary enclosure, whether or not a part of the booth, tent or enclosure is permanent; (
a)
or
a mobile structure. (
b)
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 228
Insert NSW Table 1 as follows:
NSW Table 1 : Schedule of referenced documents Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
Provisions
AS/NZS 1596 2014 The Storage and
Handling of LP
GasNSW I4D61 N/A N/A
AS 1603 2018 Automatic fire
detection and
alarm systems —
Heat alarms (See
Note 1)N/A N/A NSW 9.5.1
AS 2001 Part 5.4 2005 Methods of test
for textiles:
Dimensional
washing and
drying procedures
for textile textingNSW S7C7 N/A N/A
AS/NZS 3000 2018 Electrical
installations
(known as the
Australian/New
Zealand Wiring
Rules)NSW I5D14 N/A N/A
AS/NZS 3002 2008 Electrical
installations —
Shows and
carnivalsNSW I5D14 N/A N/A
SSL N/A Appraisal
Specification
FAS102NSW I4D46 N/A N/A
NSW Legislation 1979 Environmental
Planning and
Assessment ActNSW G5D3, NSW
Schedule 1NSW H7D4, NSW Schedule 1 NSW Schedule 1
NSW Legislation 2021 Environmental
Planning and
Assessment RegulationNSW I4D1, NSW
I4D46, NSW Schedule 1NSW Schedule 1 NSW Schedule 1
NSW Legislation 2007 Liquor Act NSW Schedule 1 NSW Schedule 1 NSW Schedule 1
NSW Legislation 1997 Rural Fires Act NSW G5D3, NSW
G5D4, NSW Schedule 1NSW Schedule 1,
NSW H7D4NSW Schedule 1
NSW Legislation N/A Standard
Instrument—
Principal Local
Environmental
PlanNSW Schedule 1 NSW Schedule 1 NSW Schedule 1
NSW Legislation 1992 Swimming Pools
ActNSW G1P2, NSW G1D2, NSW Schedule 1 NSW H7P1, NSW H7D2, NSW Schedule 1 NSW Schedule 1
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 229Table Notes
Heat alarms complying with
AS 1603.3 must be a class type A1 or A2. (1)No. Date Title Volume One Volume Two Housing
Provisions
NSW Legislation 2018 Swimming Pools
RegulationNSW G1P2, NSW
G1D2NSW H7P1, NSW H7D2 N/A
NSW Legislation 2011 Work Health and
Safety ActNSW G1D5 N/A N/A
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 230
1. Plumbing and Drainage
Administering Agency
Office of Local Government
Relevant Legislation
Local Government Act 1993
Local Government (General) Regulation 2021
Administering Agency
NSW Fair Trading
Relevant Legislation
Plumbing and Drainage Act 2011
Plumbing and Drainage Regulation 2017
Approval to Connect to Network Utility Operator’s System
Refer to the Network Utility Operator for the current Act and Regulation
Hunter Water Act 1991
Sydney Water Act 1994 Water Industry Competition Act (WICA) 2006
2. Building
Administering Agency
Department of Planning and Environment
Relevant Legislation
Environmental Planning and Assessment Act 1979
Environmental Planning and Assessment Regulation 2000
3. Health
Administering Agency
NSW Ministry of Health
Relevant Legislation
Public Health Act 2010
Public Health Regulation 2012
4. Environment
Administering Agency
Office of Environment & Heritage
Relevant Legislation
Protection of the Environment Operations Act 1997 NSW Footnote: Other legislation affecting buildings
(1 May 2023)
New South Wales
NCC 2022 Volume Three - Plumbing Code of Australia Page 2315. Gas
Administering Agency
Department of Planning and Environment, Energy, Water and Portfolio Strategy
Relevant Legislation
Gas Supply Act 1996
Gas Supply (Safety and Network Management) Regulation 2013
Administering Agency
NSW Fair Trading
Relevant Legislation
Gas and Electricity (Consumer Safety) Act 2017
Gas and Electricity (Consumer Safety) Regulation 2018
6. Electrical
Administering Agency
NSW Fair Trading
Relevant Legislation
Electricity (Consumer Safety) Act 2017
Electricity (Consumer Safety) Regulation 2018
Administering Agency
SafeWork NSW
Relevant Legislation
Work Health and Safety Regulation 2017
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 232Schedule 6 Northern Territory
Introduction
Section C Sanitary plumbing and drainage systems
Part C2 Sanitary drainage systems
NT C2P2 Swimming pool drainage
Section D Excessive noise
Part D1 Excessive noise
D1D1 Deemed -to -Satisfy Provisions
NT D1D3 Sound insulation
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 233This
Appendix contains variations and additions to the Plumbing Code of Australia (PCA) provisions which are considered
necessary for the effective application of the Code in the Northern Territory.NT Introduction
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 234 Part C2 Sanitary drainage systems
Delete C2P2 and insert NT C2P2 as follows:
NT C2P2 Swimming pool drainage
This clause has deliberately been left blank.Section C Sanitary plumbing and drainage systems
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 235 Part D1 Excessive noise
D1D1 Deemed-to -Satisfy Pr o visions
[2019: D1.1]
Delete D1D1(1) and insert NT D1D1(1) as follows:
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirement —
D1P1 is satisfied by complying with D1D2 ; and ( a)
D1P2 is satisfied by complying with— ( b)
NT F5.0 through to NT F5.8 in the NT Appendix to NCC Volume One for Class 2, 3 and 9c buildings; and (
i)
NT Part 3.8.6 in NCC Volume Two for Class 1 buildings. (
ii)
Delete D1D3 and insert NT D1D3 as follows:
NT D1D3 Sound insulation
This clause has deliberately been left blank.Section D Excessive noise
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 236
Insert NT Table 1 as follows:
NT Table 1 : Schedule of referenced documents
Table Notes
For AS 2047:
Tests carried out under earlier editions of AS 2047 remain valid. (a)
Reports based on AS 2047 relating to tests carried out after the NCC reference date for AS 2047—2014 (b)
Amendment 2 must relate to the amended Standard.Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
Provisions
AS/NZS 1170
Part 22011 Structural design
actions: Wind
actions Amdt 1, 2, 3, 4 and 5NT S4C3 N/A N/A
AS 2047 2014 Windows and
external glazed
doors in buildings
(incorporating
amendments 1
and 2) See NoteB1D4, F3V1, F3D4 H1D8, H2V1 NT 13.4.4
AS 3660 Part 1 2014 Termite
management:
New building workNT B1D4 N/A NT 3.4.1(2) , NT
3.4.2
AS 4254 Part 1 2012 Ductwork for air
handling systems
in buildings —
Flexible ductN/A N/A NT 13.7.4
AS 4254 Part 2 2012 Ductwork for air
handling systems
in buildings —
Rigid ductSpec 7 N/A NT 13.7.4
AS/NZS 4859.1 2018 Thermal
insulation
materials for
buildings —
General criteria
and technical
provisionsN/A N/A NT 13.2.2 , NT
13.7.4
BCA 2009 May 2009 Building Code of
AustraliaNT Section J N/A N/A
BCA 2019 May 2009 Building Code of
AustraliaNT Section J N/A N/A
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 237
1. Plumbing and Drainage
Administering Agency
Department of Infrastructure, Planning and Logistics
Department of Attorney-General and Justice
Relevant Legislation
Building Act
Building Regulations
Plumbers and Drainers Licencing Act
2. Building
Administering Agency
Department of Infrastructure, Planning and Logistics
Relevant Legislation
Building Act
Building Regulations
3. Health
Administering Agency
Department of Health
Relevant Legislation
Public and Environmental Health Act
Public and Environmental Health Regulations
4. Planning
Administering Agency
Department of Infrastructure, Planning and Logistics
Relevant Legislation
Planning Act
5. Gas
Administering Agency
Department of Attorney-General and Justice (NT WorkSafe)
Relevant Legislation
Dangerous Goods Act NT Footnote: Other legislation affecting buildings
(1 May 2023)
Northern Territory
NCC 2022 Volume Three - Plumbing Code of Australia Page 2386. Electrical
Administering Agency
Department of Attorney-General and Justice (NT WorkSafe)
Relevant Legislation
Electrical Workers and Contractors Act
Electricity Reform Act
Electrical Reform (Safety and Technical) Regulations
7 . Water Supply and Sewage Services
Administering Agency
Power and Water Corporation
Relevant Legislation
Water Supply and Sewerage Services Act
Water Supply and Sewerage Services Regulations
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 239
Schedule 7 Queensland
Introduction
Section B Water services
Part B1 Cold water services
B1D2 Water efficiency
Part B2 Heated water services
QLD B2P7 Energy use and source
QLD B2D2 Water heater in a heated water supply system
QLD Part B4 Fire-fighting water services
Schedule 1 Definitions
Schedule 2 Referenced documents
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 240
This Appendix contains variations and additions to the Plumbing Code of Australia (PCA) provisions which are considered
necessary for the effective application of the Code in Queensland and shall be treated as amendments to the Code.QLD Introduction
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 241 Part B1 Cold water services
B1D2 Water efficiency
[2019: B1.2]
Delete B1D2(2) and insert QLD B1D2(2) as follows:
(2) For a new Class 1 or Class 2 building, in an area serviced by a Network Utility Operator water supply, toilet cisterns
must—
have a dual flushing mechanism; and (
a)
be a minimum 4 Star WELS rating discharging not more than 4.5 litres for a full flush; and (
b)
are compatible with the size of the toilet bowl to allow for proper functioning of the toilet. (
c)
For all other installations, cisterns or flushing devices for water closets must—
have a dual flushing mechanism; and (
a)
be a minimum 3 Star WELS rating discharging not more than 6 litres or 4.5 litres for a full flush. (
b)
Part B2 Heated water services
Delete B2P7 and insert QLD B2P7 as follows:
QLD B2P7 Energy use and source
This clause has deliberately been left blank.
Delete B2D2 and insert QLD B2D2 as follows:
QLD B2D2 Water heater in a heated water supply system
This clause has deliberately been left blank.Section B Water services
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 242
Introduction to this Part
Part B4 does not apply in Queensland.
Notes
This Part does not apply in Queensland. Fire-fighting water services are required under the Queensland Building Act
1975. QLD Part B4 Fire-fighting water services
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 243
Primary building element
For the purposes of—
Volume One, a member of a building designed specifically to take part of the loads specified in B1D3 and includes ( 1)
roof, ceiling, floor, stairway or ramp and wall framing members including bracing members designed for the
specific purpose of acting as a brace to those members; or
V
olume Two— (
2)
A member of a building specifically designed to take part of the building loads and includes roof, ceiling, (
a)
floor, stairway or ramp and wall framing members including bracing members designed for the specific
purpose of acting as a brace to those members; and
door jambs, window frames and reveals, architraves and skirtings. (
b)
Explanatory Information
The loads to which a building may be subjected are dead, live, wind, snow and earthquake loads. Further information
on building loads can be found in the AS 1170 series of Standards. Schedule 1 Definitions
(1 May 2023)
Queensland
NCC 2022 Volume Three - Plumbing Code of Australia Page 244Insert QLD Table 1 as follows:
QLD Table 1 : Schedule of referenced documents Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
Provisions
BCA 2009 May 2009 Building Code of
AustraliaQLD Section J N/A N/A
N/A December 2017 Queensland
Government,
Department of Agriculture,
Fisheries and
Forestry – Construction
timbers in Queensland:
Book 1 and Book
2: Properties and
specifications for
satisfactory performance of
construction
timbers in Queensland –
Class 1 and 10
buildings
(Houses, carports, garages,
greenhouses and
sheds)QLD B1D4 QLD H1D6 N/A
N/A N/A Building Act 1975 N/A QLD H7P1, QLD H7D2 N/A
Queensland
Development
Code MP 4.1 – Sustainable
buildingsSection J Part H6
Section 13
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 245
Schedule 8 South Australia
Introduction
Section A Governing requirements
Part A6 Building classification
SA A6G7 Class 6 buildings
Section B Water services
Part B2 Heated water services
SA B2D2 Water heater in a heated water supply system
SA B2D5 Maximum delivery temperature
SA B2D9 General requirements
Part B5 Cross -connection control
SA B5D6 Rainwater
Part B6 Rainwater services
SA B6D2 General requirements
Section C Sanitary plumbing and drainage systems
Part C1 Sanitary plumbing systems
SA C1D3 General requirements
Part C2 Sanitary drainage systems
SA C2D4 General requirements
Part C3 On-site wastewater management
SA C3D2 Septic tanks
SA C3D3 Composting toilets
SA C3D4 Secondary treatment systems
SA C3D5 Domestic grey water treatment systems
SA C3D6 Land application systems
SA C3D7 Common effluent drainage systems
Schedule 1 Definitions
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 246
This Appendix contains variations and additions to the PCA provisions which are considered necessary for the effective
application of the Code in South Australia.
These variations and additions are to be treated as amendments to the PCA.SA Introduction
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 247
Part A6 Building classification
Delete A6G7 and insert SA A6G7 as follows:
SA A6G7 Class 6 buildings
[2019: SA A6.6]
A Class 6 building is a shop or other building for the sale of goods by retail or the supply of services direct to the public,
including—
an eating room, cafe, restaurant, milk or soft drink bar; or (a)
a dining room, bar, shop or kiosk part of a hotel or motel; or (b)
a hairdresser’s or barber’s shop, public laundry, or undertaker’s establishment; or (c)
market or sale room, showroom, or service station ; or (d)
a small arts venue . (e)Section A Governing requirements
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 248
Part B2 Heated water services
Delete B2D2 and insert SA B2D2 as follows:
SA B2D2 Water heater in a heated water supply system
[2019: SA B2.2]
(1) In an established Class 1 building connected to a reticulated gas supply or a new Class 1 or Class 10 building, a
water heater must be one of the following types:
A natural gas or LPG water heater, either instantaneous, continuous flow or storage, that has an energy rating (a)
of 5 stars or more.
A natural gas or LPG boosted solar water heater, with a total tank volume of not more than 700 litres, that is (b)
eligible for any number (one or more) of STCs.
An electric boosted solar water heater or electric heat pump water heater (air source or solar boosted), with a (c)
single tank, that is eligible for the minimum small-scale technology certificates shown in SA Table B2D2 .
A wood combustion water heater, with no additional heating mechanisms, with a total tank volume of not more (d)
than 700 litres.
A wood combustion boosted solar water heater, with no additional heating mechanisms, with a total tank volume (e)
of not more than 700 litres.
(2) In an established Class 1 building that is not connected to a reticulated gas supply, a water heater must be one of the
following types:
A water heater complying with the requirements set out in (1). (a)
An electric water heater with a rated hot water delivery of no greater than 250 litres. (b)
An electric instantaneous water heater, having a water storage capacity no greater than one litre and total (c)
electrical input no greater than 15.0 kW.
(3) The requirements of (1) and (2) do not apply to any of the following:
Water heaters serving buildings other than Class 1. (a)
Repairs to water heaters including: (b)
Like for like replacements that are the result of manufacturer, supplier or installer warranty arrangements. (i)
Replacement of a single major component of a solar or electric heat pump water heater (for example, a (ii)
heat pump compressor/evaporator unit, a solar collector, or a storage tank).
Secondary electric water heaters of up to 55 litres rated delivery, which do not serve a shower or bath. (c)
Temporary electric water heaters of up to 55 litres rated delivery, for a period not exceeding 60 days, pending (d)
installation of a complying water heater.
An electric or gas vented (gravity fed) water heater, located in a roof space of an established Class 1 building, (e)
of no greater than 250 litres rated hot water delivery.
A gas water heater installed entirely within a fully enclosed roof space, room or attached garage of an established (f)
Class 1 building, providing the water heater has an energy rating of 3 stars or more.
Insert SA Table B2D2 as follows:
SA Table B2D2 : Small -scale technology certificates Section B Water services
Year Tank volume of 400 litres or
more and not more than
700 litresTank volume of more than
220 litres and less than 400
litresTank volume of not more
than 220 litres
2022 34 in zone 3* and/or 32 in
zone 424 in zone 3 and/or 23 in
zone 415 in zone 3 and/or 14 in
zone 4
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 249
Table Notes
* Zones are defined by the Clean Energy Regulator
Explanatory Information: Connection to a reticulated gas supply
A property is connected to a reticulated gas supply if it has a piped connection to a gas distribution system and this
connection is capable of supplying gas to gas equipment and/or appliances.
A property is not connected to a reticulated gas supply if:
It does not have a piped connection to a gas distribution system; or •
It has a piped connection to a gas distribution system but this connection is not capable of supplying gas to gas •
equipment and/or appliances (for example, if the supply has been physically disconnected at the meter by the gas
network operator).
Reticulated gas includes:
Reticulated natural gas; or •
Reticulated compressed gas of some other type (including LPG, SNG or TLP gas). •
Explanatory Information: Gas water heaters
The energy ratings for natural gas and LPG water heaters are available at: http://www.aga.asn.au/product_directory
Explanatory Information: Solar water heaters and electric heat pump water heaters
STCs are Small-scale Technology Certificates. References to Renewable Energy Certificates (RECs) refer equally to
STCs. The number of STCs is provided for each eligible model of solar water heater and electric heat pump water
heater at: https://www.cleanenergyregulator.gov.au/RET/Scheme-participants-and-industry/Agents-and-installers/Small-
scale-systems-eligible-for-certificates/Register-of-solar-water-heaters
The STC values specified in Section SA B2D2 for either CER Zones 3 or 4 may be used to demonstrate compliance,
regardless of the actual zone in which the water heater is to be installed.
Delete B2D5 and insert SA B2D5 as follows:
SA B2D5 Maximum delivery temperature
[New for 2022]
(1) The delivery temperature of heated water at the outlet of each sanitary fixture must be—
not more than 45 °C in any— (a)
residential part of an aged care building ; or (i)
patient care area in a health-care building ; or (ii)
part of an early childhood centre , or primary or secondary school , that is used by children; or (iii)
designated accessible facility in a common area of a Class 2 building, or in any part of a Class 3 , Class 5 , (iv)
Class 6 , Class 7 , Class 8 , Class 9 a, 9b, 9c or Class 10 building; or
not more than 50 °C in all other cases. (b)Year Tank volume of 400 litres or
more and not more than
700 litresTank volume of more than
220 litres and less than 400
litresTank volume of not more
than 220 litres
2023 30 in zone 3 and/or 28 in
zone 421 in zone 3 and/or 20 in
zone 413 in zone 3 and/or 12 in
zone 4
2024 26 in zone 3 and/or 25 in
zone 418 in zone 3 and/or 18 in
zone 411 in zone 3 and/or 11 in
zone 4
2025 22 in zone 3 and/or 21 in
zone 416 in zone 3 and/or 15 in
zone 410 in zone 3 and/or 9 in
zone 4SA B2D2
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 250(2) Heated water services in buildings constructed after 19 October 1995 shall have temperature control in accordance
with 1(a) and (b).
(3) All new solar water installations (including solar water heater replacements) shall be in accordance with 1(a) and (b).
(4) Where an existing building is altered or extended in such a way that sanitary fixtures used primarily for personal
hygiene purposes are installed in a location where, before the alteration or extension, no such fixture existed, the
delivery temperature at the fixture shall be in accordance with 1(a) and (b).
(5) Where a water heater is replaced, a temperature control device is required where such a device was in place prior
to the installation of the replaced water heater
. The device must meet the requirements of 1 (a) and (b).
Applications
B2D5 applies to all heated water installations intended for personal hygiene.
Explanatory Information
Scenarios covered in B2D5 may include where—
a heated water service is installed on the premises for the first time; or •
a water heater forming part of an existing heated water service is— •
replaced with a like-for-like water heater; or◾
replaced with a dif
ferent type of water heater; or ◾
relocated, and is reconnected to, some or all of the sanitary fixtures to which it was previously connected; or◾
more than one existing sanitary fixture is replaced with new similar fixtures; or•
an existing heated water service on the premises is altered or extended to serve additional sanitary fixtures. •
Consideration should be given to the intended occupants of a building when commissioning the heated water delivery
temperature. For example, if the occupants of a Class 1 building are older adults or young children, a lower temperature
than specified in B2D5(b) should be considered.
A duty of care should be exercised by installers to explain to clients the merits of temperature control for heated water
delivered to existing sanitary fixtures used primarily for personal hygiene purposes.
Delete B2D9 and insert SA B2D9 as follows:
SA B2D9 General requirements
[2019: SA B2.9]
A heated water service must be in accordance with AS/NZS 3500.4 with the following variations—
substitute AS/NZS 3500.4 clause 5.8(c) with: 5.8(c) All new or replacement unvented storage water heaters shall (
a)
be fitted with new temperature/pressure relief and expansion control valves.
substitute
AS/NZS 3500.4 clause 5.11.2.1 with: 5.11.2.1 The drain lines from the outlet of the (
b)
temperature/pressure-relief valve and the expansion control valve on an individual water heater shall not be
interconnected.
substitute
AS/NZS 3500.4 clause 5.11.3(e) with: 5.11.3(e) All drain lines shall discharge separately over a gully, (
c)
tundish or other visible approved outlet.
Part B5 Cross-connection control
Delete B5D6 and insert SA B5D6 as follows:
SA B5D6 Rainwater
[2019: SA B1.4(1) and (2)]
Protection of drinking water services from rainwater must be in accordance with AS/NZS 3500.1(2018) Clause 16.4 and
Table 16.4 with the additions;
After 16.4, insert clause 16.4.1 as follows: 16.4.1 A reduction of the Hazard Rating listed in table 16.4 may be ( a)SA B2D5
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 251permitted following a risk assessment of the design and installation of the rainwater tank and other environmental
factors in accordance with clause 16.4.2.
After 16.4.1, insert clause 16.4.2 as follows: 16.4.2 For buried rainwater tanks and partially buried rainwater (b)
tanks without connection to a drinking water supply or with direct or indirect connections to a drinking water
supply, a dual-check valve may be used in lieu of a testable device for Containment protection and Zone
protection where it has been determined by risk assessment that—
the risk to tank rainwater quality from air pollution is low; and (i)
the risk to tank rainwater quality from groundwater and/or surface water contamination is low. In assessing (ii)
this risk the permeability of the tank and piping materials and joints to groundwater contaminants should
be addressed; and
precautions in the design and installation of the rainwater collection system have been taken to reduce (iii)
impacts to tank rainwater quality from the roof collection and delivery system. Such measures include, but
are not restricted to, appropriate materials, gutter guards, filters, first flush devices, dry inlets, guards to
exclude vermin and mosquitoes, and the quality of tank maintenance programs; and
precautions in the design and installation of the rainwater tank have been taken to reduce impacts to tank (iv)
rainwater quality from groundwater and surface water pollution. Such measures include, but are not limited
to—
location and topography; and (A)
structural integrity of the tank including installation factors such as bedding, embedment, compaction (B)
and geotechnical specifications; and
water tightness of tank including all penetrations, connections, access covers and joints; and (C)
ingress of vermin through the overflow e.g. by provision of a reflux valve, self-sealing valve, trap check (D)
valve; and
the risk assessment results must be submitted to the authority having jurisdiction. (E)
Part B6 Rainwater services
Delete B6D2 and insert SA B6D2 as follows:
SA B6D2 General requirements
[2019: SA B1.4(1) and (2)]
A rainwater service must comply with
Section 15
of AS/NZS 3500.1. Additionally, after Clause 15.3.3(c) insert (d)—(d) For Class 1 buildings and extensions or additions to Class 1 buildings the following applies.
Where a water service from a rainwater tank interconnect with a water service from a water main supply, the supply
to a fixture, appliance or water outlet shall be maintained by a device/mechanism that facilitates a seamless automatic
switching from one water service supply to another and vice versa without the need for manual intervention.SA B5D6
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 252 Part C1 Sanitary plumbing systems
Delete C1D3 and insert SA C1D3 as follows:
SA C1D3 General requirements
[2019: SA C1.3]
A sanitary plumbing system must be in accordance with AS/NZS 3500.2 with the following variations:
After AS/NZS 3500.2 clause 3.9.1 (g) insert (h) and (i) as follows: (h) at the downstream end of a trade waste (
a)
arrestor close to the outlet; and (i) at the upstream end of a trade waste drain connected to a trade waste arrestor
and fitted with a wind driven turbine ventilator at the termination.
After
AS/NZS 3500.2 clause 3.9.3.1 (e) add (f) and (g) as follows: (f) where required by Clause 3.9.1 (h) the (
b)
downstream vent on any trade waste drain shall not be less than DN80; and (g) where required by Clause 3.9.1
(g) the upstream vent on a trade waste drain shall not be less than DN80.
After
AS/NZS 3500.2 clause 4.7.1(h), insert clause 4.7.1(i) as follows: Inspection openings indicated in 4.7.1(b), (
a)
(d) (e) and (f) shall be raised to finished surface level. All other inspection openings need not be raised provided
they are not below paved, concreted or similar finished surfaces.
Substitute
AS/NZS 3500.2 clause 2.3(a) as follows: Bends in pipes shall have a throat radius complying with (
b)
Table 5.6 and Figure B6 of AS/NZS 1260 (2017) and shall be free from wrinkling and flattening.
After
AS/NZS 3500.2 clause 12.7(g), insert clause 12.7(h) as follows: Buried pumped discharge pipes and rising (
c)
mains shall be placed in close-fitting durable sleeving or continually spirally wrapped. The sleeving or spiral
wrapping shall be identified for the full length with the following statement: “sewer rising main” or “pumped
discharge pipe” in accordance with
AS 1345.
After
AS/NZS 3500.2 clause 12.7(h), insert clause 12.7(i) as follows: Above ground pumped discharge pipes (
d)
and rising mains shall be permanently identified with the following statement: “sewer rising main” or “pumped
discharge pipe” in accordance with
AS 1345. The statement shall be installed in a visible position running
longitudinally
, at no more than 3 metre intervals.
After
AS/NZS 3500.2 clause 13.27.2, insert clause 13.28 as follows: All trade waste pre-treatment equipment (
e)
shall connect to the sewerage system via a disconnector gully.
Part C2 Sanitary drainage systems
Delete C2D4 and insert SA C2D4 as follows:
SA C2D4 General requirements
[New for 2020]
A sanitary drainage system must be in accordance with AS/NZS 3500.2 with the following variations:
After AS/NZS 3500.2 clause 4.7.1(h), insert clause 4.7.1(i) as follows: Inspection openings indicated in 4.7.1(b), (
a)
(d) (e) and (f) shall be raised to finished surface level. All other inspection openings need not be raised provided
they are not below paved, concreted or similar finished surfaces.
Substitute
AS/NZS 3500.2 clause 2.3(a) as follows: Bends in pipes shall have a throat radius complying with (
b)
Table 5.6 and Figure B6 of AS/NZS 1260 (2017) and shall be free from wrinkling and flattening.
After
AS/NZS 3500.2 clause 12.7(g), insert clause 12.7(h) as follows: Buried pumped discharge pipes and rising (
c)
mains shall be placed in close-fitting durable sleeving or continually spirally wrapped. The sleeving or spiral
wrapping shall be identified for the full length with the following statement: “sewer rising main” or “pumped
discharge pipe” in accordance with
AS 1345.
After
AS/NZS 3500.2 clause 12.7(h), insert clause 12.7(i) as follows: Above ground pumped discharge pipes (
d)
and rising mains shall be permanently identified with the following statement: “sewer rising main” or “pumped
discharge pipe” in accordance with
AS 1345. The statement shall be installed in a visible position running
longitudinally
, at no more than 3 metre intervals.Section C Sanitary plumbing and drainage systems
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 253After AS/NZS 3500.2 clause 13.27.2, insert clause 13.28 as follows: All trade waste pre-treatment equipment (e)
shall connect to the sewerage system via a disconnector gully.
Part C3 On-sit e wastewater management
Delete C3D2 and insert SA C3D2 as follows:
SA C3D2 Septic tanks
[New for 2022]
A septic tank must be in accordance with the South Australia On-Site Wastewater Systems Code.
Delete C3D3 and insert SA C3D3 as follows:
SA C3D3 Composting toilets
[New for 2022]
A waterless composting toilet must be in accordance with the South Australia On-Site Wastewater Systems Code.
Delete C3D4 and insert SA C3D4 as follows:
SA C3D4 Secondary treatment systems
[New for 2022]
A secondary treatment system must be in accordance with the South Australia On-Site Wastewater Systems Code.
Delete C3D5 and insert SA C3D5 as follows:
SA C3D5 Domestic grey water treatment systems
[New for 2022]
A domestic greywater treatment system must be in accordance with the South Australia On-Site Wastewater Systems
Code.
Delete C3D6 and insert SA C3D6 as follows:
SA C3D6 Land application systems
[New for 2022]
A land application system must be in accordance with the South Australia On-Site Wastewater Systems Code.
Delete C3D7 and insert SA C3D7 as follows:
SA C3D7 Common effluent drainage systems
[New for 2022]
A common effluent drainage system must be in accordance the South Australia Community Wastewater Management
Systems Code.SA C2D4
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 254
Agriculture: Cropping, grazing, animal husbandry, intensive animal keeping, horticulture, aquaculture, wool shearing or
dairy, but not viticulture or forestry.
Assembly building
A building where people may assemble for—
civic, theatrical, social, political or religious purposes including a library, theatre, public hall or place of worship; (a)
or
educational purposes in a school , early childhood centre , preschool, or the like; or (b)
entertainment, recreational or sporting purposes including— (c)
a discotheque or nightclub; or (i)
a cinema; or (ii)
a sports stadium, sporting or other club; or (iii)
transit purposes including a bus station, railway station, airport or ferry terminal. (d)
Brush fence: A fence or gate that is primarily constructed of Broombrush (Melalueca Uncinata).
Bulk grain storage facility: A building or structure used for the commercial bulk handling or storage of granular materials
such as grain, ore, or the like, where only a small number of occupants are present at one time and includes cell type
silos and storage sheds .
Cell type silo: A type of bulk grain storage facility similar to that illustrated in diagram (a) of Figure SA 1 .
Insert SA Figure 1 as follows:
SA Figure 1 : Two types of bulk grain storage facilities
Farm building
A single storey Class 7 or 8 building that is—
primarily associated with agriculture and located on land used primarily for agriculture ; and (a)Schedule 1 Definitions
C 1 conveyorC 4 conveyorC 6 escape hatch
reclaim tunnel
feedshoes and valves
elevator boot pitC 1 escape
hatchroad hoppershelter
tunnelgridsE 2 elevatortoweroutloader chutesdistributorelevator
discharge hoodcell chutes C 3 conveyor
oversilo gallery
cell top level
main cells
(a) Cell type silo (b) Storage shed
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 255the total number of people accommodated in the building does not exceed one person per 200 m2 of total floor (b)
area, or six people, whichever is greater; and
the floor area of each building does not exceed the maximum floor area and volume specified in Table SA 1 for (c)
the type of farm building ; and
the building does not contain occupancies of excessive fire hazard as listed in E1D5 to E1D13; and (d)
if the building is used for the storage of hay, an open space complying with C3D5(1) is provided around the (e)
perimeter of each building.
Insert SA Table SA 1 as follows:
SA Table SA 1 : Farm building categories and maximum floor area
Rainwater tank: A vessel for the storage of surface water collected from the roof catchment area of the building.
Roof catchment area: The area of the roof (expressed in square metres), measured on the horizontal (no allowance for
slope or vertical surfaces) and includes the plan area of the gutters.
Small arts venue: The whole or the only part of a building that has a rise in storeys of not more than 2—
in which cultural activities including live music, visual arts displays, dancing, poetry and spoken word (a)
performances are provided to the public; and
the floor area used as a small arts venue does not exceed 300 m2; and (b)
no pyrotechnics or theatrical smoke (smoke machines, hazers or the like) are used. (c)
Storage shed: A type of bulk grain storage facility similar to that illustrated in diagram (b) of Figure SA 1 .Building group Type of farm building Maximum floor area Maximum volume
Group A Buildings used for keeping,
growing and/or harvesting
of animals and/or plants,
and includes greenhouses
with rigid covering material
and large implement/vehicle
storage sheds.5,000 m230,000 m3
Group B Buildings used for packing,
sorting and/or storage of
produce and may include
workshops.2,000 m212,000 m3
Group C Greenhouses with non-rigid,
plastic or fabric covering
material.5,000 m230,000 m3
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 256
Insert SA Table 1 as follows:
SA Table 1 : Schedule of referenced documents
Table Notes
The Planning and Design Code is the version current at the time of project documentation approval, unless noted (1)
otherwise.Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS/NZS 1260 2017 PVC-U pipes
and fittings for
drain, waste
and vent
applications
Amdt 1N/A N/A N/A C1D3
AS 1428 Part 1 2001 Design for
access and
mobility –
General
requirements
for access –
New building
workN/A SA H10D4 N/A N/A
AS/NZS 1891 Part 4 2000 Industrial fall-arrest systems and devices:
Selection, use
and maintenanceSA G8D3 N/A N/A N/A
enHealth
Council,
Department of
Health and
Ageing2004 Guidance on
the use of
rainwater tanksN/A SA H9D5 N/A N/A
— See Note 1 Planning and
Design CodeSA G5D5 SA H7D4(3) N/A N/A
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 257
In addition to this Code, there are a number of other legislative technical requirements affecting the design, construction,
installation, replacement, repair, alteration and maintenance of plumbing that practitioners may need to be aware of,
including, but not necessarily limited to, the following list.
1. Plumbing and Drainage
Administering Authority
Office of the Technical Regulator, Department for Energy and Mining
Relevant Legislation
Water Industry Act 2012
Water Industry Regulations 2012
Plumbing Standard published by the Technical Regulator
2. Building
Administering Authority
Planning and Land Use Services, Department for Trade and Investment
Relevant Legislation
Planning, Development and Infrastructure Act 2016
Planning, Development and Infrastructure (General) Regulations 2017
3. Health
Administering Authority
SA Health
Relevant Legislation
South Australian Public Health Act 2011
South Australian Public Health (Wastewater) Regulations 2013
SA Onsite Wastewater Systems Code SA Community Wastewater Management Systems Code
Safe Drinking Water Act 2011
Safe Drinking Water Regulations 2012
South Australian Public Health (Legionella) Regulations 2013
Guidelines for the Control of Legionella in Manufactured Water Systems in South Australia -
revised 2013
4. Environment
Administering Authority
Environmental Protection Authority
Relevant Legislation
Environment Protection Act 1993 SA Footnote: Other legislation affecting buildings
(1 May 2023)
South Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 258Environmental Protection Regulations 2009
Local Nuisance and Litter Control Act 2016 (administered by the Local Governments)
5. Gas
Administering Authority
Office of the Technical Regulator, Department for Energy and Mining
Relevant Legislation
Gas Act 1997
Gas Regulations 2012
AS/NZS 5601 Gas Installations
AS 3814 Industrial and Commercial Gas Fired Appliances
AS/NZS 1596 The Storage and Handling of LP Gas
Energy Products (Safety and Efficiency) Act 2000
Energy Products (Safety and Efficiency) Regulations 2012
6. Electrical
Administering Authority
Office of the Technical Regulator, Department for Energy and Mining
Relevant Legislation
Electricity Act 1996 Electricity (General) Regulations 2012
Energy Products (Safety and Efficiency) Act 2000
Energy Products (Safety and Efficiency) Regulations 2012
AS/NZS 3000 Wiring Rules
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 259
Schedule 9 Tasmania
Introduction
Section A Governing requirements
Part A1 Interpreting the NCC
A1G4 Interpretation
Part A4 Referenced documents
A4G1 Referenced documents
Part A5 Documentation of design and construction
A5G4 Evidence of suitability ─ Volume Three (PCA)
Section B Water services
Part B1 Cold water services
TAS B1P5 Pressure
TAS B1D3 General requirements
TAS B1D7 Cold water storage tanks
Part B2 Heated water services
TAS B2P9 Pressure
TAS B2D2 Water heater in a heated water supply system
TAS B2D6 Temperature control devices
Part B7 Rainwater storage
TAS B7D2 Collection of rainwater
Section C Sanitary plumbing and drainage systems
Part C2 Sanitary drainage systems
C2D4 General requirements
TAS C2D6 Venting requirements
Part C3 On-site wastewater management
TAS C3P5 General requirements
TAS C3D6 Land application systems
TAS Part C4 On-site liquid trade waste systems
Performance Requirements
TAS C4P1 Health, environment and amenity protection
TAS C4P2 Transferal of liquid trade waste
TAS C4P3 Design, construction and installation
Deemed-to-Satisfy Provisions
TAS C4D1 Application
TAS C4D2 General requirements
TAS C4D3 Location
TAS C4D4 Covers
TAS C4D5 Materials
TAS C4D6 Ventilation
TAS C4D7 Connections
TAS C4D8 Silt pits
TAS C4D9 Silt traps
TAS C4D10 Straining pits
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 260TAS C4D11 Straining traps
TAS C4D12 Grease interceptors
TAS C4D13 Portable grease interceptor appliances
TAS C4D14 Venting of grease traps
TAS C4D15 Grease trap installation in multi -storey buildings
TAS C4D16 Oil and petrol interceptors
TAS C4D17 Acid neutralising tanks
TAS C4D18 Mixing tanks
TAS C4D19 Settling tanks
Section E Facilities and ancillary additions
TAS Part E2 Heating, cooling and ventilation systems
Objectives
TAS E2O1 Objective
Functional Statements
TAS E2F1 Functional statement 1
TAS E2F2 Functional statement 2
Performance Requirements
TAS E2P1 Design, construction, installation and maintenance
TAS E2P2 Pressure equipment
TAS E2P3 Microbial control
Deemed-to-Satisfy Provisions
TAS E2D1 Application
TAS E2D2 General requirements
TAS Part E3 Stormwater - Roof drainage systems
Objectives
TAS E3O1 Objective
Functional Statements
TAS E3F1 Functional statements
Performance Requirements
TAS E3P1 Roof drainage systems
TAS E3P2 Overflow
TAS E3P3 Watertightness
TAS E3P4 Design, construction and installation
Deemed-to-Satisfy Provisions
TAS E3D1 Application
TAS E3D2 General requirements
TAS E3D3 Roofing of liquid trade waste generation areas
TAS Part E4 Stormwater surface and sub-surface drainage systems
Objectives
TAS E4O1 Objective
Functional Statements
TAS E4F1 Functional statements
Performance Requirements
TAS E4P1 Surface drainage systems
TAS E4P2 Subsurface drainage
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 261TAS E4P3 Design, construction and installation
Deemed-to-Satisfy Provisions
TAS E4D1 Application
TAS E4D2 General requirements
TAS E4D3 Protection from surface water
Schedule 1 Definitions
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 262
This Appendix contains variations and additions to the Plumbing Code of Australia (PCA) provisions which are considered
necessary for the effective application of the PCA in Tasmania and shall be treated as amendments to the Code.TAS Introduction
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 263 Part A1 Interpreting the NCC
A1G4 Interpretation
[2019: A1.0]
Insert subclause TAS A1G4(7) in clause A1G4 as follows:
(7) The Director of Building Control may issue written advice to deal with arising issues such as interpretation of codes,
standards and regulations.
Part A4 Referenced documents
A4G1 Referenced documents
[2019: A4.0]
Delete A4G1(3) and insert TAS A4G1(3) as follows:
(3) The following applies:
All
Tasmanian legislative documents referenced within the PCA are taken to be the latest published versions (
a)
thereof unless noted otherwise.
Part A5 Documentation of design and construction
A5G4 Evidence of suitability ─ Volume Three (PCA)
[2019: A5.3]
Insert subclause TAS A5G4(7) in clause A5G4 as follows:
(7) A product used in roof plumbing, heating ventilation and air-conditioning or on-site liquid trade waste are deemed fit
to be for their intended purpose if it has evidence of suitability in the form of—
WaterMark Licence issued in accordance with the WaterMark Certification Scheme ; or ( a)
a current certificate issued by a certification body stating that the properties and performance of a product meet (
b)
the requirements of the NCC Volume Three; or
authorisation from the Director of Building Control. (
c)
Insert subclause TAS A5G4(8) in clause A5G4 as follows:
(8) A product used in On-site wastewater management systems are deemed to be fit for their intended purpose if it has
evidence of suitability in the form of—
an On-site wastewater management system used in a plumbing installation must be issued with a Certificate of ( a)
Accreditation in accordance with the AS 1546 series of Standards; or
a current certificate issued by a JAS-ANZ accredited certification body stating that the properties and (
b)
performance of a product meets the requirement of NCC Volume Three; and
accreditation from the Director of Building Control. (
c)
Insert subclause TAS A5G4(9) in clause A5G4 as follows:
(9) A holding tank or collection well for use in a plumbing or drainage installation may be verified as meeting the
Performance Requirements of the Director of Building Control if complies with AS/NZS 1546.1.
Insert subclause TAS A5G4(10) in clause A5G4 as follows:
(10) Under the Tasmanian Building Act, the Director of Building Control may accredit an On-site wastewater management
system . On-site wastewater management systems larger than that covered by the Australian Standards AS/NZS
1546 Series are exempt from accreditation and a Performance Solution is required.Section A Governing requirements
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 264Products accredited by the Director of Building Control are published in a list available at www.cbos.tas.gov.au .A5G4
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 265 Part B1 Cold water services
Delete B1P5 and insert TAS B1P5 as follows:
TAS B1P5 Pressure
[2019:BP1.2, TAS Exemption 1]
The points of discharge for a cold water service must—
have— (
a)
a working pressure of not less than 50 kPa; and (
i)
a static pressure within the building of not more than 500 kPa; or (
ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside (
b)
of (a)(i) and (a)(ii) are required.
Exemptions
B1P5(a)(i) and B1P5(a)(ii) do not apply to existing low-pressure gravity only water services.
Delete B1D3 and insert TAS B1D3 as follows:
TAS B1D3 General requirements
[2019: TAS B1.4(1), (2) and (3)]
(1) The design, construction, installation, repair, alteration, additions, maintenance and commissioning of cold water
services must be in accordance with
AS/NZS 3500.1.
(2) Cold water tanks forming part of a drinking water supply must comply with TAS B1D7 .
(3) Backflow prevention for boundary containment must comply with the Network Utility Operator Boundary Backflow
Containment Selection Requirements.
Exemptions
B1D3(1) does not apply to existing low-pressure gravity only water supply systems.
Insert TAS B1D7 as follows:
TAS B1D7 Cold water storage tanks
[2019 TAS B101]
(1) B1D7 applies to tanks — including rainwater tanks — connected to the roof plumbing system, or a tank supplied
from a nearby stream, bore or well used in drinking water services, or a drinking water supply in reticulated or non-
reticulated areas.
Installation of cold-water storage tanks used to supply water to a drinking water service must comply with B1D7.
For connection of cold water tanks where reticulated supply is available refer to Sections 8 and 15 of
AS/NZS 3500.1.
(2) Cold water storage tanks and their installation must comply with the relevant requirements of the following
documents—
AS 2070 Plastics materials for food contact use (
a)
AS 3600 Concrete structures (
b)
AS 3735 Concrete structures retaining liquids (
c)
AS/NZS 2179.1 Specifications for rainwater goods, accessories and fasteners – Metal shape or sheet rainwater (
d)
goods, and metal accessories and fastenersSection B Water services
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 266AS/NZS 3500.0 Plumbing and drainage (e)
AS/NZS 3500.1 Water services (f)
AS/NZ 3500.3 Stormwater drainage (g)
AS/NZS 4020 Testing of products in contact with drinking water (h)
AS/NZS 4130 Polyethylene (PE) pipes for pressure applications (i)
AS/NZS 4766 Polyethylene storage tanks for water and chemicals (j)
ABCB Procedures for the Certification of Plumbing and Drainage Products Section B Water services Tasmania (k)
NCC 2019 Volume Three - Plumbing Code of Australia Page 134 (l)
The followings references are for information only— HB 230 Rainwater Tank Design and Installation (i)
Handbook and the enHealth Guidance on the use of rainwater tanks
(3) Materials and products in contact with water in a drinking water supply must comply with AS/NZS 4020. Linings and
coatings must comply with AS/NZS 4020 at a surface area to volume ratio not greater than that specified in the
conditions of use. Materials and products used in manufacture of tanks must be selected to ensure fitness for their
intended purpose. Tanks must be selected from the relevant Standards listed in this Part. Factors to be taken into
account include — but are not limited to—
the nature and source of the water; (a)
the risk of corrosion and tank contamination; (b)
the nature of the environment; (c)
the physical and chemical characteristics of the materials and products; (d)
compatibility of materials and products; and (e)
accessibility for monitoring and maintenance. (f)
(4) Plastic tanks must comply with AS/NZS 4766
(5) Waterstops, joint fillers and sealants used in the manufacture of tanks must be certified under the WaterMark
Certification Scheme to AS/NZS 4020.
(6) Solders used in the manufacture of tanks must be certified under the WaterMark Certification Scheme to AS/NZS
4020. Soft solder must comply with AS 1834.1 and be lead-free for roof drainage components used for the conveyance
of drinking water.
(7) Stainless steel sheet must be manufactured from alloy 304 or 316 complying with ASTM A240/A240M.
(8) Dezincification resistant (DR) copper alloys Where dezincification resistant copper alloys are specified, they must
comply with AS 2345.
(9) Steel sheet Hot-dipped zinc-coated or aluminium/zinc-coated sheet steel must comply with AS 1397 and have an
internal lining or coating certified to AS/NZS 4020.
(10) Concrete tanks must comply with AS 3735 or AS 3600.
(11) Tank linings must comply with AS/NZS 4020.
(12) In addition to the marking requirements set out in clause 8.9 of AS/NZS 3500.1 all tanks must be permanently marked
with the following—
Manufacturer’s name, brand or trademark, and (a)
The Standard which the tank is manufactured to, and (b)
The date of manufacture. (c)
(13) A sludge valve must be fitted when the capacity of the tank exceeds 500 Litres. The minimum size of the valve must
be not less than half the outlet pipe size and not less than DN 40.
(14) All openings to tanks must be sealed so that insects, small animals, birds and sunlight cannot enter tanks, in order
to minimise the growth of algae and to prevent unauthorised access.
(15) Before using the water from a tank for the first time the tank must be cleaned and disinfected (See Appendix I of
AS/NZS 3500.1).
(16) The manufacturer’s warranty must contain the following statement: “This tank has been manufactured for the storage
of drinking water and all materials used are suitable for contact with drinking water.”
TAS B1D7
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 267Explanatory Information
Information on some of the above items listed in the materials above may be obtainable from the manufacturer or
supplier of the product or materials.
Rainwater for drinking purposes should not be collected from recently painted roofs (until after the first few rainfalls),
timber roofs preserved with chemicals, roofs coated with lead flashings, lead-based paints or tar-based coatings, or
parts of roofs near flues from solid fuel heaters. Rainwater for drinking water purposes may be collected from roof types
other than those identified above provided the roof and associated gutters are kept clean of leaves, animal remains,
dust and other debris. Gutters must be kept clean by installing screens or leaf diverters between the roof and the water
tank. The system should incorporate a ‘first flush system’ or other diversion system that will prevent the first flush of
water from entering the tank.
Tanks should be regularly maintained by cleaning out accumulated sludge from the base every 2 - 3 years. For detailed
advice on desludging and maintaining tanks refer to the enHealth Guide – Guidance on the use of rainwater tanks; or
HB 230 Rainwater tank design and installation handbook
For ongoing maintenance of water quality one or more of the following water quality treatment methods should be
adopted: Chlorinating: To commission the tank sufficient chlorine should be added to provide a free chlorine residual of
0.5 mg/L after 30 minutes. To satisfy chlorinating requirements an initial dose of 5 mg/L of chlorine may be necessary.
For every kL of water in the tank, add either: 40 mL of liquid pol chlorine (sodium hypochlorite - 12.5% available chlorine);
or 8 grams of granular pool chlorine (calcium hypochlorite - 65% available chlorine). To calculate the tank volume in kL
for a cylindrical tank the volume in of water in kL = D x D x H x 0.785. Where D = diameter of the tank, and H = depth
of water in the tank in metres. To verify this calculation, compare this volume with the maximum capacity of the tank.
The chlorine residual may be tested with a swimming pool test kit or dip strips. Water after chlorinating should not be
used for 24 hours to enable any harmful microorganisms to be killed off. Filtration: If filters are used in drinking water
installations they are to be certified to the relevant Australian Standard under the WaterMark Certification Scheme and
should be maintained by following the manufacturer’s maintenance instructions. Ultraviolet Disinfection: Filtration may
be required to address water turbidity to enable adequate UV disinfection. Ultraviolet treatment is affected by the levels
of turbidity, organic content from suspended solids, pH, hardness and UV transmissivity of the water. The intensity of
the UV light and the build-up of suspended solids on the quartz tube affect the disinfection performance. Regular
monitoring of the quartz tubes is critical. Lamps also need to be replaced regularly in accordance with the manufacturer’s
instructions.
Part B2 Heated water services
Delete B2P9 and insert TAS B2P9 as follows:
TAS B2P9 Pressure
[2019:BP2.3, TAS Exemption 1]
The points of discharge for a heated water service must—
have— (a)
a working pressure of not less than 50 kPa: and (i)
a static pressure within the building of not more than 500 kPa; or (ii)
have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside (b)
of (a)(i) and (a)(ii) are required.
Exemptions
B2P9(a)(i) and B2P9(a)(ii) do not apply to existing low-pressure gravity only water services.
Delete B2D2 and insert TAS B2D2 as follows:
TAS B2D2 Water heater in a heated water supply system
[2019: TAS B2.2(1)(a) and ( d)]
In a new Class 1 or Class 10 building—
a water heater in a heated water supply system must be— (a)TAS B1D7
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 268a solar water heater complying with (b); or ( i)
a heat pump water heater complying with (b); or (
ii)
a gas water heater complying with (c); or (
iii)
an electric resistance water heater complying with AS/NZS 3500.4; or (
iv)
a wood fired thermosiphon water heater or direct fired water heater each complying with AS/NZS 3500.4; (
v)
and
a solar water heater and a heat pump water heater must have— (
b)
for a building with 1 or 2 bedrooms— (
i)
at least 14 Small-scale Technology Certificates for the zone where it is being installed; or ( A)
an energy saving of not less than 40% in accordance with AS/NZS 4234 for a “small” load system; (
B)
and
for a building with 3 or 4 bedrooms— (
ii)
at least 22 Small-scale Technology Certificates for the zone where it is being installed; or ( A)
an energy saving of not less than 60% in accordance with AS/NZS 4234 for a “medium” load system; (
B)
and
for a building with more than 4 bedrooms— (
iii)
at least 28 Small-scale Technology Certificates for the zone where it is being installed; or ( A)
an energy saving of not less than 60% in accordance with AS/NZS 4234 for a “large” load system; and (
B)
a gas water heater must be rated not less than 5 stars in accordance with AS 4552. (
c)
Delete B2D6 and insert TAS B2D6 as follows:
TAS B2D6 Temperature control devices
[2019: TAS B2.6( d), Application 1 and Exemption 1]
(1) A temperature control device used to deliver heated water in accordance with B2D5(a) must be a—
thermostatic mixing valve; or (
a)
thermostatically controlled tap. (
b)
(2) A temperature control device used to deliver heated water in accordance with B2D5(b) must be a—
thermostatic mixing valve; or (
a)
thermostatically controlled tap; or (
b)
tempering valve; or (
c)
temperature limited water heater limited to 50°C in accordance with AS 3498. (
d)
(3) The required maximum delivery temperature must be achieved in accordance with AS/NZS 3500.4.
Applications
B2D6 only applies to new and replacement heated water installations.
Exemptions
B2D6 does not apply to the replacement of a single heated water storage unit within a range or bank of heaters. TAS B2D2
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 269 Part B7 Rainwater storage
Delete B7D2 and insert TAS B7D2 as follows:
TAS B7D2 Collection of rainwater
[2019:B6.2(2), TAS]
(1) Rainwater storage must only collect roof water.
(2) A rainwater storage system for Class 1 and Class 10 buildings satisfies B7D1 if it is installed in accordance with the
requirements within the Tasmanian Building Act - Directors Guidelines - Charged Downpipes to Rainwater Tanks of
Class 1 and Class 10 buildings for drinking water purposes document.Part B7
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 270
Part C2 Sanitary drainage systems
C2D4 General requirements
[2019: C2.4]
Insert subclause TAS C2D4(2) in clause C2D4 as follows:
(2) For Tasmanian venting requirements see TAS C2D6 .
TAS C2D6 Venting requirements
[2019: TAS H102.1(1) and (3)]
(1) A sanitary drainage system must provide ventilation in accordance with AS/NZS 3500.2.
(2) A sanitary drainage system which connects to an on-site wastewater management system must have—
a secondary vent within 10 metres of the on-site wastewater management system ; or (a)
where (a) cannot be achieved, a low level (ground) vent at the sanitary drainage point of connection . (b)
(3) A sanitary drainage system which connects to an on-site wastewater management system must have inspection
openings that—
are located at the point of connection to an on-site wastewater management system ; and (a)
terminate at or above finished surface level. (b)
Explanatory Information
See TAS Figure C2D6 Alternative venting arrangements
Insert TAS Figure C2D6 (explanatory) as follows:
TAS Figure C2D6 ( explanatory ): Venting requirements
Section C Sanitary plumbing and drainage systems
IOKSTR
WC
IO
IO
10 m max.ORG
Waste water
treatment unitVents must terminate in accordance
with AS/NZS 3500.2
Alternative vent
Ground vent
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 271 Part C3 On-site wastewater management
Delete C3P5 and insert TAS C3P5 as follows:
TAS C3P5 General requirements
[New for 2022]
On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater must
be designed and constructed—
with required treatment and storage capacity for the volume and make up of waste and frequency of discharge ( a)
for disposal; and
with required size, strength and rigidity for the nature, flow rates, volume of wastes and/or waste products which ( b)
must be processed; and
using materials which are impervious both to the waste for which disposal is required and to water; and (
c)
to avoid the likelihood of surface water and stormwater entering the system; and ( d)
so that access or inspection openings provided for desludging and maintenance terminate at or above finished (
e)
surface level.
so that the installation throughout its serviceable life will continue to satisfy the requirements of C3P1 to C3P9 . ( f)
Explanatory Information
For alternative venting arrangements, see clause C2D6 in sanitary drainage.
Delete C3D6 and insert TAS C3D6 as follows:
TAS C3D6 Land application systems
[2019: HP1.4]
(1) An On-site wastewater management system and associated land application system must avoid the following:
Damage from root penetration, superimposed loads or ground movement. (
a)
Entry of water, foul air or gasses from the system into buildings. (
b)
Entry of stormwater into the system. (
c)
Blockage and unintended or uncontrolled discharge . ( d)
(2) An On-site wastewater management system and associated land application system must provide the following:
Protection against internal contamination. (
a)
Access for maintenance and cleaning. (
b)
Ventilation to avoid foul air and gasses accumulation in the system. (
c)
(3) A facility must continue to satisfy the requirements of C3D6(1) and C3D6(2).Part C3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 272Introduction to this Part
This Part sets out the requirements for the on-site treatment and disposal of liquid trade waste.
TAS C4P1 Health, environment and amenity protection
[2019: Tas HP2.1]
An on-site liquid trade waste system must ensure—
the risks associated with the discharge of treated liquid trade waste to the environment are minimised; and (
a)
surface water and ground water are not polluted; and ( b)
soil productivity is maintained or enhanced. (
c)
TAS C4P2 Transferal of liquid trade waste
[2019: Tas HP2.2]
(1) Liquid trade waste must be transferred within the disposal system and treatment devices in a way that avoids—
blockage and uncontrolled discharge : and ( a)
the entry of foul air and gasses into buildings. (
b)
(2) Liquid trade waste must be transferred within the disposal system and treatment devices in a way that ensures—
the safe and hygienic transferal of waste; and (
a)
safe access for clearing blockages . ( b)
TAS C4P3 Design, construction and installation
[2019: HP2.3]
(1) A trade waste treatment device must—
have appropriate treatment and storage capacity for the volume of waste and frequency of disposal: and (
a)
be of the appropriate size, strength and rigidity for the nature, flowrates, volume of wastes, by-products and (
b)
residues which must be processed; and
have vehicle access for collection of waste, where appropriate; and (
c)
be of an appropriate structural strength for when pedestrian or vehicular traffic is likely; and (
d)
be constructed from materials which are resistant to water and the expected waste that will be disposed. (
e)
(2) A trade waste treatment device must avoid the likelihood of—
contamination of drinking water , soils, ground water and waterways; and ( a)
foul air and gasses accumulating within or entering buildings; and (
b)
uncontrolled discharge ; and ( c)
the unauthorised access by people; and (
d)
the entry of stormwater to the sewerage system. (
e)
(3) A trade waste treatment device must allow for—
cleaning, maintenance, measurement and performance sampling provisions to the requirements of the
Authority (
a)
having jurisdiction; andTAS Part C4 On-site liquid trade waste systems
Performance Requirements
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 273the identification of the manufacturer, model, serial number and capacity after installation. ( b)
(4) A trade waste treatment device must continue to satisfy the requirements of C4P1 - C4P3 throughout its expected
lifetime.
(5) A
trade waste treatment device must be approved by—
the receiving Network Utility Operator ; or ( a)
The Authority having jurisdiction for on-site wastewater management systems . ( b)
Applications
C4P3(2)(e) does not apply in cases where a contaminated stormwater discharge of limited volume is accepted by the
Network Utility Operator .
Low risk liquid trade wastes can be described as those water-borne discharges, other than sewerage, that are classified
by the Permit Authority as presenting a low risk to cause harm to the environment and on-site wastewater management
systems . These discharges must be trapped and partially treated before being permitted to enter the on-site wastewater
management system .
Trade waste products or installations may be used if they are considered low risk.
TAS C4D1 Application
[2019: Tas H2.2]
Performance Requirements C4P1 to C4P3 are satisfied by complying with C4D2 to C4D19.
TAS C4D2 General requirements
[2019: Tas H2.2]
(1) Where pre-treatment facilities are installed, they must comply with the requirements of—
the Network Utility Operator (where applicable); and ( a)
occupational health and safety; and (
b)
dangerous goods management; and (
c)
environmental protection. (
d)
(2) A liquid trade waste system that discharges to a Network Utility Operator’s sewerage system after pre-treatment
must—
be capable of discharging liquid trade waste at a quality set under a Consent to Discharge issued for that (
a)
equipment or system by the Network Utility Operator ; and
the sanitary drainage system must comply with: (
b)
AS/NZS 3500.2; and (
i)
the Network Utility Operator’s guidelines, insofar as the provisions relate to the system. ( ii)
Explanatory Information: Cross-volume considerations
Part B1 of NCC Volume One sets out requirements relevant to the excavation of pipework adjacent to a building and
footings for the purpose of installing liquid trade waste systems in Class 2 to Class 9 buildings.
TAS C4D3 Location
[2019: H202.2]
(1) Low-risk trade waste appliances must be located as close as practicable to the fixtures served, whether installed
internally or externally and may be above or below ground.Deemed -to-Satisfy ProvisionsTAS C4P3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 274(2) Portable appliances must only be installed above ground.
Explanatory Information
Examples of low-risk trade wastes are discharges from—
food preparation in take-away shops, restaurants, hotels, motels and the like (1)
laboratories in education institutions such as schools and universities (2)
service stations, vehicle detailing and washing. (3)
It is the role of the Permit Authority to determine whether trade waste discharge is high-risk or low-risk when installed in
areas outside the jurisdiction of the Network Utility Operator .
TAS C4D4 Covers
[2019: H202.2]
Trade waste appliances must be fitted with covers which can withstand vehicular or pedestrian traffic or other loads likely
to be imposed on them and be easily removable by one person.
TAS C4D5 Materials
[2019: H202.2]
Trade waste appliances must be constructed from materials suitable for the characteristics of the liquid wastes likely to be
discharged.
TAS C4D6 Ventilation
[2019: H202.2]
(1) Where airtight covers are fitted, trade waste appliances must be vented with a minimum DN 50 vent.
(2) Outlet ventilation is to be provided by either a—
DN 100 riser from a disconnector gully outside a building; or (a)
DN 50 vent from a disconnector gully at the outlet of a non-portable appliance inside a building; or (b)
DN 50 vent from a DN 80 trap riser at the outlet of a portable appliance, inside a building. (c)
(3) Trade waste appliance vents and outlet vents may be combined inside a building.
(4) Ventilation must be provided in accordance with AS/NZS 3500.2.
Explanatory Information
Sizing of trade waste ventilation should take into consideration the expected discharge volumes and cooling
requirements of the specific installation.
TAS C4D7 Connections
[2019: H202.2]
(1) The plumbing and drainage installation upstream of a low-risk trade waste appliance must comply with AS/NZS 3500.2
(2) The sanitary plumbing and drainage system must be compatible to the nature of the waste.
(3) A trap must be fitted to every fixture or appliance outlet and must be—
DN 50 minimum for a portable appliance with hydraulic loading up to 5 fixture units; or (a)
DN 80 minimum for a portable appliance with hydraulic loading greater than 5 fixture units; or (b)
DN 100 minimum for all other appliances. (c)
TAS C4D3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 275Exemptions
Installations outside C4D7(1) may be permitted by the Permit Authority.
TAS C4D8 Silt pits
[2019: H202.4a]
(1) The silt pit must be connected and authorised by the Permit Authority.
(2) The silt pit bucket must—
be constructed of mild steel plate, minimum 3 mm thick with 4 rows of 10 mm diameter holes at 25 mm centres: (
a)
and
be hot dipped galvanised after fabrication. (
b)
Explanatory Information
See TAS Figure C4D8 for a typical silt pit.
Insert TAS Figure C4D8 (Explanatory) as follows:
TAS Figure C4D8 (Explanatory ): Silt pits
TAS C4D9 Silt traps
[2019: H202.4b ]
(1) The silt trap must be connected and authorised by the Permit Authority.
(2) The silt trap bucket must—
be constructed of mild steel plate, minimum 3 mm thick with 5 rows of 10 mm diameter holes at 25 mm centres; (
a)
and
be hot dipped galvanised after fabrication. (
b)
Explanatory Information
See TAS Figure C4D9 for a typical silt trap.
Insert TAS Figure C4D9 (Explanatory) as follows: Paving slab
Outlet level
SECTION A-A
PIT PLAN
(Bucket and grating removed) BUCKET DETAILSPlan Elevation300
min.
100
min.150
225380A A
240290380
25 x 10
Handle
380Outlet
Outlet to:
• trade waste appliance disconnector gully
100 x 88.5° cast ironbend with largeinspection opening10 mm min. thickunperforated plate sectionover inspection opening
100 mm concrete walls andbase with smooth internal finish10 mm min. thick perforated
steel plate with 12 mm dia.holes at 25 mm centresTAS C4D7
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 276TAS Figure C4D9 (Explanatory ): Silt traps
TAS C4D10 Straining pits
[2019: H202.4c]
(1) The straining pit must be connected and authorised by the Permit Authority.
(2) The straining pit basket must—
be constructed of mild steel wire with a minimum diameter of 2.5 mm woven to give 7 mm aperture widths on a (a)
32 mm x 32 mm x 25 mm angle iron frame with mitred corners; or
be constructed from minimum 3 mm thick mild steel plate, with 6 holes at 12 mm centres over the entire area of (b)
the basket; and
be hot dipped galvanised after fabrication. (c)
Explanatory Information
See TAS Figure C4D10 for a typical straining pit.
Insert TAS Figure C4D10 (Explanatory) as follows:
75
100175295
200
BUCKET DETAILS SILT TRAP ASSEMBLY25 x 5
Handle
100 Yard gullySilt trap grating
Silt trap bucket
Silt trap topOutlet to:
trade waste appliance direct to drain direct to stack disconnector gully TAS C4D9
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 277TAS Figure C4D10 (Explanatory ): Straining pits
TAS C4D11 Straining traps
[2019: H202.4d]
(1) The straining trap must be connected and authorised by the Permit Authority.
(2) The straining pit basket must—
be constructed of mild steel wire with a minimum of 2.5 mm woven to give 7 mm aperture widths on a 32 mm x (a)
32 mm x 25 mm angle iron frame with mitred corners with a top frame of welded angle iron; or
be constructed from minimum 3 mm thick mild steel plate, with 6 mm holes at 12 mm centres over the entire (b)
area of the basket; and
be hot dipped galvanised after fabrication. (c)
(3) If the straining trap is to be used in installations connected to the Network Utility Operator’s sewerage system, it must
comply with the requirements of the Network Utility Operator’s guidelines for pre-treatment devices.
600 min.
100
min.
460 20
AA
200
230410510
BASKET DETAILSPlan Elevation
510Woven wire
mesh basket
25 x 10
Handle
Angle iron
framePIT PLAN
(Basket and grating removed)460460Paving slab
Outlet level
Straining basket
100 mm concrete
walls and base withsmooth internal finishOutlet
Outlet to: trade waste appliance disconnector gully
100 x 88.5° cast ironbend with largeinspection opening510 x 510 mild steel bargrating 20 mm min barswith 12 mm max spaces
SECTION A-ATAS C4D10
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 278Explanatory Information
See TAS Figure C4D11 for a typical straining trap.
Insert TAS Figure C4D11 (Explanatory) as follows:
TAS Figure C4D11 (Explanatory ): Straining traps
TAS C4D12 Grease interceptors
[2019: H202.4e]
(1) A grease interceptor must contain a permanently fixed, ridged baffle constructed of a minimum 6 mm—
mild steel plate; or (a)
other authorised material. (b)
(2) A grease interceptor must be installed on a minimum of 75 mm compacted packing sand.
(3) A grease interceptor must have a minimum DN 50 vent where airtight covers are fitted.
(4) A grease interceptor installed underground must be constructed with—
minimum 100 mm concrete walls with a smooth internal finish; and (a)A A
BASKET DETAILS25 x 10
HandlePLAN
(Perforated plate and basket removed)SECTION A-A
Plan Elevation
225375
240290375
375Outlet to:
trade waste appliance direct to drain direct to stack disconnector gully 100 Outlet10 mm thick perforated
steel plate with 12 mmholes at 25 mm centres
Sump to have smooth
internal finish
80 mm maxPaving slab
100 Disconnector
gully grating
100 Disconnector
gully extension piece150 mm Concrete
100 cast iron or V.C.
disconnector gullyTAS C4D11
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 279have suitable reinforcing mesh within the concrete. (b)
(5) A grease interceptor installed above ground must—
be constructed of an authorised material; and (a)
provide adequate structural support. (b)
(6) The capacity of a grease interceptor must be authorised by the Permit Authority.
(7) A grease interceptor must be installed in a location that will facilitate ready access for maintenance and inspection.
Exemptions
Where the Permit Authority has not specified the capacity of a grease interceptor in accordance with C4D12(5), it must
be—
equivalent to the maximum hourly discharge; and (a)
no less than 250 litres below the outlet. (b)
Explanatory Information
The contents of a grease interceptor may become slightly acidic. It is recommended that the internal concrete (1)
surfaces below the outlet level be provided with an acidic resistant lining.
Where the grease interceptor is installed outside a building, consideration should be given to fitting airtight covers. (2)
See TAS Figure C4D12 for a typical grease interceptor for above ground installations. (3)
Insert TAS Figure C4D12 (Explanatory) as follows:
TAS Figure C4D12 (Explanatory ): Grease interceptors
TAS C4D13 Portable grease interceptor appliances
[2019: H202.4f]
(1) The capacity of a portable grease interceptor must be authorised by the Permit Authority.
(2) A portable grease interceptor must contain a permanently fixed, ridged baffle constructed of a minimum—
6 mm unplasticised polyvinyl chloride (PVC-U); or (a)
0.79 mm galvanised sheet steel; or (b)A A
1000
1800300Outlet
level75
250 200
600
min300
min
100 5050
100 Inlet pipe 100 Outlet pipe50 Vent (if required)
PLAN
(Cover removed)SECTION A-A50 Vent (if airtight
covers are fitted)
100 Outlet pipe
100 minimum concretewalls and base withsmooth internal finish,with suitable reinforcingmesh in concreteOutlet junction to beof authorised material
Outlet todisconnector gullyCovers of a size to be readilyremovable by one man
Inlet drain to be ofauthorised material100 Inlet pipe
Permanently fixed rigidbaffle constructed of 6 mmmin mild steel plate orother authorised material
75 Compacted packing sandTAS C4D12
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 2800.63 mm copper sheet; or ( c)
0.63 mm of 316 stainless steel; or (
d)
Other authorised material. (
e)
(3) A portable grease interceptor must be provided with airtight covers using lever clips.
(4) V
entilation of portable grease interceptors must—
be extended to open air; and (
a)
comply with AS/NZS 3500.2. (
b)
(5) A portable grease interceptor must be located in a position that enables ready access for maintenance and inspection.
(6) A
portable grease interceptor must be protected from direct sunlight.
Exemptions
Where the Permit Authority has not specified the capacity of a grease interceptor in accordance with C4D13(1), it must
be—
equivalent to the maximum hourly discharge; and (
a)
no less than 100 litres below the outlet. (
b)
Explanatory Information
See TAS Figure C4D13 for a typical portable grease interceptor appliance.
Insert TAS Figure C4D13 (Explanatory) as follows:
TAS Figure C4D13 (Explanatory ): Portable grease interceptor appliances
TAS C4D14 Venting of grease traps
[2019: H202.4g]
(1) Grease trap chambers must provide adequate ventilation by providing—A
100 Outlet pipeA
400
80050 Vent
100 Inlet pipe200Air tight cover
Fixed baffle 50 Vent
PLAN
(Cover removed)SECTION A-AOutlet pipe100 Pumping port with
screwed cap (optional)
Inlet pipe
450 145
minOutlet
level
100100 120 25
75
Outlet to:
trapped waste &
disconnector gully
trapped waste & stack trapped waste & 90° bendTAS C4D13
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 281two DN 100 vents in addition to the ventilation provided for the sanitary drainage system; or (a)
appropriate mechanical ventilation. (b)
(2) Anti-siphon vents must be—
a minimum of DN 50: and (a)
connected to the outlet of the grease trap chamber. (b)
Explanatory Information
See TAS Figure C4D14a and TAS Figure C4D14b for typical venting arrangement for grease trap chambers.
Insert TAS Figure C4D14a (Explanatory) as follows:
TAS Figure C4D14a (Explanatory ): Venting of grease traps
Insert TAS Figure C4D14b (Explanatory) as follows:
TAS Figure C4D14b (Explanatory ): Venting of grease traps
TAS C4D15 Grease trap installation in multi -st orey buildings
[2019: H202.4i ]
Grease traps in multi-storey buildings must have a reflux valve installed between the outlet and connection to the sanitary
plumbing system.
100 mm Arrestor vent
100 mm Arrestor vent
Chamber fitted with airtight
door (refrigerator type)50 mm Anti-syphon vent100 mm Chamber vents
Trap fitted with sealed lids.
Therefore 2-100 mm chambervents required also 100 mmarrestor vent100 mmGrease trap
chamber80 mm or
100 mm W.S.
Grease trap
chamber
Chamber fitted with airtightdoor (refrigerator type)50 mm Anti-syphon vent
100 mm80 mm or
100 mm W.S.
100 mm S.V.P. or W.S.
Fan
Trap left open
"No Lid" safetygrill on trapTAS C4D14
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 282Explanatory Information
See TAS Figure C4D15 for a typical installation of a grease trap in a multi-storey building.
Insert TAS Figure C4D15 (Explanatory) as follows:
TAS Figure C4D15 (Explanatory ): Grease trap installation in multi -storey buildings
TAS C4D16 Oil and petrol interceptors
[2019: H202.4j ]
(1) The capacity of an oil and petrol interceptor must be authorised by the Permit Authority.
(2) An oil and petrol interceptor must contain a permanently fixed, ridged baf
fle constructed of a minimum—
6 mm mild steel plate; or (
a)
other authorised material. (
b)
(3) PVC-U must not be used for the construction, connection or venting of an oil and petrol interceptor.
(4) An oil and petrol interceptor must be provided with airtight covers that are suitable size and be readily removable by
one person.
(5) The inlet and outlet of the oil and petrol interceptor pit is to be covered with either a 600 mm x 600 mm or 600 mm
diameter cover
.
(6) V
entilation of oil and petrol interceptors must—
be extended to open air; and (
a)
comply with AS/NZS 3500.2. (
b)
(7) An oil and petrol interceptor must be located in a position that enables ready access for maintenance and inspection.Grease
trapFloor level
Gully overflow level
Street level
Sealed and
vented gully
Sewer mainW.S.
K.S.Main relief vent pipe
50 mm Anti-syphon vent
100 mm
Reflux valve outlet
100 mm
Reflux valve boundarytrap connectionS.V.PTAS C4D15
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 283(8) Outlet fittings from an oil and petrol interceptor must be manufactured from one piece of DN 100 cast iron pipe.
(9) An oil and petrol interceptor must be protected from traf
fic loads by a suitable cover.
(10) When an oil and petrol interceptor is connected to the Network Utility Operator’s sewerage system. it must comply
with the requirements of the Network Utility Operator’s guidelines for pre-treatment devices.
Exemptions
Where the Permit Authority has not specified the capacity of an oil and petrol interceptor in accordance with C4D16(1),
it must be no less than 11400 litres, below the outlet.
Explanatory Information
See TAS Figure C4D16 for a typical oil and petrol interceptor appliance.
Insert TAS Figure C4D16 (Explanatory) as follows:
TAS Figure C4D16 (Explanatory ): Oil and petrol interceptors
TAS C4D17 Acid neutralising tanks
[2019: H202.4k]
(1) The capacity of an acid neutralising tank must be authorised by the Permit Authority.
(2) An acid neutralising tank and fixed baf
fles must be constructed of a minimum—
6 mm PVC-U sheet; or (
a)
0.63 mm acid resistant stainless steel all welded construction; or (
b)
other authorised acid and alkali resistant material. (
c)
(3) An acid neutralising tank must contain three equally spaced baffles.
(4) An acid neutralising tank must be manufactured with—
the diameter of the outlet pipe being at least one size larger than the inlet pipe (i.e. DN 65 inlet - DN 80 outlet); (
a)
or
where the inlet pipe is DN 100, the diameter of the outlet may be DN 100. (
b)
(5) The outlet of an acid neutralising tank must include a 32 mm x 32 mm x 25 mm deep PVC-U test block bracket fitted80 Vent
100 Inlet pipe
Permanently fixed
rigid baffleconstructed of 6 mm min mild steelplate or otherapproved materialOutlet
level150
250 200
950 400
min
100
max25600
2000A
100 Inlet pipe 100 Outlet pipeA80 Vent
PLAN
(Cover removed)SECTION A-A100 Outlet pipe
100 minimum concretewalls and base withsmooth internal finish,with suitable reinforcingmesh in concreteBrackets
75 Compactedpacking sand200
max200
max
Outlet to disconnector gully
100 cast iron outlet pipeclipped to wall
300TAS C4D16
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 284as near as practicable to the outlet.
(6) An acid neutralising tank must include a 150 mm x 25 mm x 25 mm cement mortar test block fitted to the satisfaction
of the Permit Authority.
(7) An acid neutralising tank must include marble chips in the 40 mm to 60 mm size range.
(8) An acid neutralising tank must be located in a position that—
enables ready access for maintenance and inspection; and (a)
provides ready access for fitting of the cement mortar test block; and (b)
enables ready access to the sampling valve; and (c)
provides ready access for replacement of the marble chips. (d)
(9) When an acid neutralising tank is to be located below ground level, it must—
be surrounded with concrete walls and base with a minimum thickness of 100 mm; and (a)
omit the 25 mm sampling valve; and (b)
have a minimum DN 100 outlet pipe located no deeper than 600 mm below surface level; and (c)
have the outlet pipe connected to a disconnector gully fitted with a loose fitting grate or screwed cap. (d)
Exemptions
The requirements of C4D17(4) does not apply to existing systems.
The capacity of an acid neutralising tank as shown in Tas figure C4D17 is the minimum requirement of 27 litres between
the marble chip level and the outlet level.
Explanatory Information
See TAS Figure C4D17 for an acid neutralising tank.
Insert TAS Figure C4D17 (Explanatory) as follows:
TAS Figure C4D17 (Explanatory ): Acid neutralising tanks
A A
375
600
PLAN
(Cover removed)SECTION A-AOutlet to:
trapped waste & disconnector gully trapped waste & stack trapped waste & 90° bend25
180
300 150
min
Outlet
level100
10050
25Cover
Outlet pipe
25 Sampling valveTest blockInlet pipe
Fixed baffle Alternative
position ofinlet pipe
Marble chipsMarble chip level
Outlet pipeFixed baffles
Bracket
Fixed gratingAlternative
position ofinlet pipeTAS C4D17
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 285 TAS C4D18 Mixing tanks
[2019: H202.4l]
(1) The capacity of a mixing tank must be authorised by the Permit Authority.
(2) A
mixing tank and baffles must be constructed of a minimum—
6 mm PVC-U sheet; or (
a)
0.63 mm acid resistant stainless steel all welded construction; or (
b)
other authorised acid and alkali resistant material. (
c)
(3) A mixing tank must contain three equally spaced baffles.
(4) A
mixing tank pipe diameter must be—
DN 100 when the pipe inlet size is DN 100; or (
a)
a minimum of one size larger than the inlet pipe. (
b)
(5) The outlet of a mixing tank must include a 32 mm x 32 mm x 25 mm deep PVC-U test block bracket fitted as near as
practicable to the outlet.
(6) A
mixing tank must include a 150 mm x 25 mm x 25 mm cement mortar test block fitted to the satisfaction of the
Permit Authority
.
(7) A
mixing tank must be located in a position that—
enables ready access for maintenance and inspection; and (
a)
provides ready access for fitting of the cement mortar test block; and (
b)
enables ready access to the sampling valve. (
c)
(8) When a mixing tank is to be located below ground, it must—
be surrounded with concrete walls and base with a minimum thickness of 100 mm; and (
a)
omit the 25 mm sampling valve; and (
b)
have a minimum DN 100 outlet pipe located no deeper than 600 mm below surface level; and (
c)
have the outlet pipe connected to a disconnector gully fitted with a loose fitting grate or screw cap. (
d)
Exemptions
The minimum capacity requirement of a typical mixing tank in accordance with C4D18(1) is 100 litres.
Explanatory Information
See TAS Figure C4D18 for a typical mixing tank.
Consideration should be given to a mixing tank being provided with adequate structural support.
Insert TAS Figure C4D18 as follows: TAS C4D18
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 286TAS Figure C4D18 :Mixing tanks
TAS C4D19 Settling tanks
[2019: H202.4m]
(1) The capacity of a settling tank must be authorised by the Permit Authority.
(2) The settling tank and baffles are to be constructed of a minimum—
6 mm unplasticised polyvinyl chloride (PVC-U); or (a)
0.79 mm galvanised sheet steel; or (b)
0.63 mm copper sheet; or (c)
0.63 mm 316 stainless steel; or (d)
other authorised acid and alkali resistant material. (e)
(3) The diameter of the outlet pipe must be—
DN 100 when the outlet size is DN 100; or (a)
a minimum one size larger than the inlet pipe. (b)
(4) A settling tank must be located in a position that enables ready access for maintenance, sampling and inspection.
(5) Where a settling tank is to be located below ground level, it must—
be surrounded with concrete walls and base with a minimum thickness of 100 mm; and (a)
omit the 25 mm sampling valve; and (b)
have a minimum DN 100 outlet pipe located no deeper than 600 mm below surface level; and (c)
have the outlet pipe connected to a disconnector gully fitted with a loos fitting grate or screwed cap. (d)
Exemptions
Where the Permit Authority has not specified the capacity of a settling tank in accordance with C4D19(1), it must be—
equivalent to the maximum hourly discharge; and (a)
no less than 72 litres, below the outlet. (b)A A
450
750
PLAN
(Cover removed)SECTION A-A25
300 150
min
Outlet
level100
10050
25Inlet pipe
Fixed baffle Cover
Outlet pipeAlternative
position ofinlet pipe
25 Sampling valveTest block
Outlet pipeFixed baffles
Bracket
Fixed gratingAlternativeposition ofinlet pipeOutlet to: trapped waste & disconnector gully trapped waste & stack trapped waste & 90° bendTAS C4D18
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 287
Explanatory Information
See TAS Figure C4D19 for a typical settling tank.
Insert TAS Figure C4D19 as follows:
TAS Figure C4D19 :Settling tanks
Scum baffle
Inlet pipe
25 Drain valveOutlet pipe
25 Sampling valveFixed gratingScum baffle
Inlet pipeCover
PLAN
(Cover removed)SECTION A-AOutlet to:
trapped waste & disconnector gully trapped waste & stack trapped waste & 90° bend
Fixed grating50 50300level25
150
min
Outlet
10050
Outlet pipeA A
400
600TAS C4D19
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 288
Section E Facilities and ancillary additions
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 289
Introduction to this Part
This Part sets out the requirements for mechanical heating, cooling and ventilation systems.
TAS E2O1 Objective
[2019: GO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a heating, ventilation (a)
or air-conditioning installation; and
ensure that a heating, ventilation or air-conditioning installation is suitable; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a heating, ventilation or air-conditioning installation is designed and is capable of being maintained (f)
so that throughout its serviceable life it will continue to satisfy Objectives (a) to (e).
TAS E2F1 Functional statement 1
[2019: GF1.1]
Mechanical services, plant and equipment used for heating, cooling and/or ventilation of a building must be adequate
for their intended purpose.
TAS E2F2 Functional statement 2
[2019: GF2.2]
A heating, cooling and/or ventilation system must support energy efficient outcomes and minimise any impact on building
occupants of adjoining spaces, the Network Utility Operator’s infrastructure, property and environment.
TAS E2P1 Design, construction, installation and maintenance
[2019: GP1.1]
(1) A mechanical service, plant and equipment for heating, cooling and/or ventilation must avoid the following:
Damage to property. (a)
Loss of amenity to occupants. (b)
(2) A mechanical service, plant and equipment for heating, cooling and/or ventilation must ensure the following:
Efficient use of energy and water. (a)
Access for maintenance. (b)TAS Part E2 Heating, cooling and ventilation systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 290 TAS E2P2 Pressure equipment
[2019: GP1.2]
Pressure equipment used in mechanical heating, cooling and ventilation systems must avoid the likelihood of explosion,
rupture or leakage.
TAS E2P3 Microbial control
[2019: GP1.3]
Mechanical air-handling and cooling water systems installed in a building must control the accumulation of microbial
growth.
TAS E2D1 Application
[2019: G1.1]
Performance Requirement E2P1 to E2P3 are satisfied by complying with E2D2.
TAS E2D2 General requirements
[2019: G1.2]
(1) Mechanical ventilation and air-conditioning systems for must comply with the requirements of the relevant Parts of:
NCC Volume One for Class 2 to 9 Buildings; or (a)
NCC Volume Two for Class 1 and 10 Buildings. (b)
(2) Mechanical ventilation and air-conditioning equipment must be in accordance with:
AS/NZS 1200, (a)
AS 1324.1 for the application, performance and construction for air filters for use in general ventilation and air- (b)
conditioning,
AS 1345 for the identification of the contents of pipes, conduits and ducts, (c)
AS/NZS 1668.1 for the use of mechanical ventilation and air-conditioning in buildings for fire and smoke control (d)
in multi-compartment buildings,
AS 1668.2 for the use of mechanical ventilation and air-conditioning in buildings for mechanical ventilation, (e)
AS/NZS 3500.1 for the design, installation, alteration, addition, repair and commissioning of cold water services, (f)
AS/NZS 3500.2 for the design, installation, alteration, addition and repair of sanitary plumbing and drainage , (g)
AS/NZS 3500.4 for the design, installation, commissioning, alteration, addition and repair of heated water (h)
services,
AS 4254.1 for flexible ductwork for air-handling systems in buildings, (i)
AS 4254.2 for the rigid ductwork for air-handling systems in buildings, (j)
AS 4426 for the selection, installation and finish of thermal insulation of pipework, ductwork and equipment. (k)
AS 4508 for the thermal resistance of insulation for ductwork used in building air-conditioning, and (l)
AS 5601 for gas installations. (m)
(3) Copper piping for air-conditioning and refrigeration must be in accordance with AS/NZS 1571.Deemed -to-Satisfy ProvisionsTAS E2P2
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 291
Introduction to this Part
This Part sets out the requirements for a roof drainage system.
TAS E3O1 Objective
[2019: F01]
The objective of this part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a roof drainage (a)
installation; and
ensure that a roof drainage installation is adequate; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a roof drainage installation is designed and is capable of being maintained so that throughout its (f)
serviceable life it will continue to satisfy Objectives (a) to (e).
TAS E3F1 Functional statements
[2019: FF01]
Buildings are to be provided with roof drainage to provide protection to people, property and the environment from
adverse effects of stormwater.
TAS E3P1 Roof drainage systems
[2019: FP1.1]
(1) A roof drainage system must have the capacity to transfer the volume of water anticipated in a 5% annual exceedance
probability rainfall event.
(2) Box and valley gutters must have capacity to transfer the volume of water anticipated in a 1% annual exceedance
probability rainfall event.
(3) The annual exceedance probability must be appropriate to—
the importance of the building; and (a)
the severity of potential damage to the property; and (b)
The severity of loss of amenity , illness or injury that would result from the failure of the system. (c)
TAS E3P2 Overflow
[2019: FP1.2]
A roof drainage system must provide an overflow device suitable for a 1% annual exceedance probability rainfall event. TAS Part E3 Stormwater - Roof drainage systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 292 TAS E3P3 Watertightness
[2019: FP1.3]
All internal roof drainage components must be watertight .
TAS E3P4 Design, construction and installation
[2019: FP1.4]
(1) A roof drainage system must ensure that—
stormwater is transferred to a Network Utility Operator’s stormwater system or an approved disposal system ; ( a)
and
appropriate access is provided for maintenance and clearing blockages . ( b)
(2) A roof drainage installation must avoid blockage and uncontrolled discharge causing—
loss of amenity ; and ( a)
loss to building and property. ( b)
(3) A roof drainage installation must avoid foul air and gasses accumulating in the roof drainage system.
TAS E3D1 Application
[2019: F1.1]
Performance Requirements E3P1 to E3P4 are satisfied by complying with E3D2 and E3D3.
TAS E3D2 General requirements
[2019: F1.2]
A roof drainage system must comply with—
AS/NZS 3500.3; or (
a)
Housing Provisions 7.4 (b)
TAS E3D3 Roofing of liquid trade waste generation areas
[2019: H201.2]
(1) When a liquid trade waste generating process does not fully occur within a building, suitable roofing must prevent
the entry of stormwater to the disposal system.
(2) When a liquid trade waste generating process occurs within a building where one or more sides are open to the
weather
, a vertical overhang of a minimum of 10° from the roofing must be provided.
(3) Where the wind driven rainwater is likely to enter under the roof in extreme storm conditions, the roof must overhang
by a minimum of 10° from the roofing.
Explanatory Information
TAS Figure E3D3 provides an example of a suitable installation practice to meet the requirements of E3D3(3).
Insert TAS Figure E3D3 explanatory as follows: Deemed -to-Satisfy ProvisionsTAS E3P3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 293TAS Figure E3D3 explanatory: Roofing of liquid trade waste areas
Overhang
Roof
Bund/speed hump/ kerbing10°
150 mm
min.TAS E3D3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 294
Introduction to this Part
This Part sets out the requirements for a surface drainage system to a Network Utility Operator’s stormwater system or
an approved disposal system .
TAS E4O1 Objective
[2019: FO2]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a stormwater (a)
drainage installation; and
ensure that a stormwater drainage installation is adequate; and (b)
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a storm water drainage installation is designed and is capable of being maintained so that (f)
throughout its serviceable life it will continue to satisfy Objectives (a) to (e).
TAS E4F1 Functional statements
[2019: DF2.1]
Buildings and their surroundings are to be provided with a surface drainage and subsurface drainage installation and
be constructed in such a manner as to provide protection for people, property and the environment from the adverse
effects of stormwater.
TAS E4P1 Surface drainage systems
[2019: FP2.1]
(1) A surface drainage system must have capacity to transfer the volume of water anticipated in an annual exceedance
probability rainfall event.
(2) The annual exceedance probability must be appropriate to the—
importance of the building; and (a)
severity of potential damage to property, loss of amenity , illness or injury that would result from the failure of the (b)
system.
TAS E4P2 Subsurface drainage
[2019: FP2.2]
A subsoil drainage system must remove excess groundwater and reduce soil moisture levels to prevent loss by changing
soil moisture conditions. TAS Part E4 Stormwater surface and sub -surface drainage systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 295 TAS E4P3 Design, construction and installation
[2019: FP2.3]
(1) A surface drainage installation must avoid the following:
Blockage and uncontrolled discharge . (a)
Damage from root penetration, superimposed loads or ground movement. (b)
Entry of sewage and/or liquid trade waste. (c)
Entry of stormwater into a sanitary drainage . (d)
Damage to the Network Utility Operator’s drainage system (e)
Foul air and gases accumulating in the stormwater system. (f)
Loss to buildings or property. (g)
(2) A surface drainage installation must ensure the following:
Access for maintenance and clearing blockages . (a)
Stormwater is transferred to a Network Utility Operator’s stormwater system or an approved disposal system . (b)
TAS E4D1 Application
[2019: F2.1]
Performance requirements E4P1 to E4P3 are satisfied by complying with E4D2 and E4D3.
TAS E4D2 General requirements
[2019: F2.2]
A surface and subsurface drainage system must comply with—
AS/NZS 3500.3; or (a)
Housing provisions 3.3 (b)
TAS E4D3 Protection from surface water
[2019: H201.2]
Surface water must be prevented from escaping a liquid trade waste generating area though the installation of a bund,
speed hump or other feature a minimum of 150 mm high surrounding the area.
Explanatory Information
Stormwater drains alone may not be adequate as stormwater will often flow over the grate and enter a liquid tradewaste
generating area. The total surface water across the site is to be considered and the height of the bund or other feature
should be increased where there is a risk of stormwater entering the liquid Tradewaste generating area.
See TAS Figure E3D3 for a typical diagram of roofing and bunding of liquid tradewaste generation areas. Deemed -to-Satisfy ProvisionsTAS E4P3
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 296
Centre-based care class 4 facility: A facility as defined in Centre Based Care Class 4 Standards.
Centre-based care class 5 facility: A facility as defined in Centre Based Care Class 5 Standards.
Early childhood centre
Any premises or part thereof providing or intending to provide a centre-based education and care service within the
meaning of the Education and Care Services National Law Act 2010 (Vic), the Education and Care Services National
Regulations and centre-based services that are licensed or approved under State and Territory children’s services
law, but excludes—
education and care primarily provided to school aged children in outside school hours settings; and (a)
services licensed as centre-based care class 4 under the Child Care Act 2001. (b)
Expert judgement
For Volume Three, the judgement of a person who has the qualifications and expertise to determine whether a Plumbing
or Drainage Solution complies with the Performance Requirements .
Explanatory Information
The level of qualification and/or experience required to determine whether a Plumbing or Drainage Solution complies
with the Performance Requirements may differ depending on the degree of complexity and the requirements of the
Tasmanian Building Act. Practitioners should seek advice from the Permit Authority .
Permit Authority: A permit authority as defined in the Building Act 2016.
Public: Includes any person working in an enclosed public place.
School age care facility: Is a facility providing care for children (primarily) 5 years or older in an outside of school hours
setting, either approved or licenced under Education and Care Services National Law (Application) Act 2011 or the
Child Care Act 2001.
Temporary structure: Includes any–
booth, tent or other temporary enclosure, whether or not part of the booth, tent or enclosure is permanent; or (a)
temporary seating structure; or (b)
other structure prescribed under the Building Act 2016. (c)Schedule 1 Definitions
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 297
Insert TAS Table 1 as follows:
TAS Table 1 : Schedule of referenced documents Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
Provisions
AS 1657 2018 Fixed platforms,
walkways,
stairways and
ladders – Design,
construction and
installationTAS I10D3 N/A N/A
AS/NZS 1668
Part 12015 The use of ventilation and
air-conditioning in
buildings: Fire
and smoke
control in multi-compartment buildingsTAS I4D7 N/A N/A
AS 1668 Part 2 2012 The use of ventilation and
air-conditioning in
buildings:
Mechanical
ventilation in
buildingsTAS I4D7, TAS
I16D5N/A N/A
AS/NZS 1680 Part 1 2006 Interior lighting:
General principles
and
recommendationsTAS I4D8, TAS
I7D2, TAS I7D3,
TAS I16D4N/A N/A
AS/NZS1680 Part
2.12008 Interior lighting:
Circulation
spaces and other
general areasTAS I7D2, TAS
I7D3, TAS I16D4N/A N/A
AS/NZS1680 Part 2.2 2008 Interior lighting:
Office and screen based tasksTAS I7D2, TAS
I7D3, TAS I16D4N/A N/A
AS/NZS1680 Part 2.3 2008 Interior lighting:
Education and
training facilitiesTAS I7D2, TAS
I7D3, TAS I16D4N/A N/A
AS/NZS1680 Part
2.42017 Interior lighting:
Industrial tasks
and processesTAS I4D8, TAS
I7D2, TAS I7D3N/A N/A
AS/NZS1680 Part 2.5 2018 Interior lighting:
Hospitals and
medical tasksTAS I7D2, TAS
I7D3N/A N/A
AS 2658 2008 LP Gas – Portable and
mobile appliancesTAS I16D7 N/A N/A
AS 2746 2008 Working areas for
gas fuelled
vehiclesTAS I17D2 N/A N/A
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 298No. Date Title Volume One Volume Two Housing
Provisions
AS/NZS 3000 2018 Electrical
installations
(known as the
Australian/New
Zealand Wiring
Rules)TAS I16D6 N/A N/A
AS 4464 2007 Hygienic
production of
game meat for
human
consumptionTAS I6D2 N/A N/A
AS 4465 2006 Construction of
premises and
hygienic
production of
poultry meat for
human
consumptionTAS I6D2 N/A N/A
AS 4466 1998 Hygienic
production of
rabbit meat for
human
consumptionTAS I6D2 N/A N/A
AS 4674 2004 Design,
construction and
fit-out of food
premises
(Clauses 4.2 and
4.3)TAS I4D9, TAS
I4D13N/A N/A
AS 4696 2007 Hygienic
production and
transportation of
meat and meat products for human
consumptionTAS I6D2 N/A N/A
AS 5008 2007 Hygienic
rendering of
animal productsTAS I6D2 N/A N/A
AS 5010 2001 Hygienic
production of
ratite (emu/ostrich)
meat for human
consumptionTAS I6D2 N/A N/A
AS 5011 2001 Hygienic
production of
natural casings
for human consumptionTAS I6D2 N/A N/A
ABCB — Temporary
Structures
StandardTAS I16D2 N/A N/A
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 299No. Date Title Volume One Volume Two Housing
Provisions
Australasian
Health Facility
Guidelines— N/A TAS I9D2 N/A N/A
BCA 2019
Amendment 12019 Building Code of
AustraliaTAS Section J TAS Part H6 TAS
Section 13
Centre Based
Care Class 4
StandardsN/A Tasmanian
Licencing
Standards for
Centre Based
Child Care Class
4TAS Schedule 1 TAS Schedule 1 TAS Schedule 1
Centre Based
Care Class 5
StandardsN/A Tasmanian
Licencing
Standards for
Centre Based
Child Care Class
5 (0-12 years)TAS Schedule 1 TAS Schedule 1 TAS Schedule 1
Child Care Act 2001 N/A TAS I16P1, TAS
I16P2, TAS
I16P3, TAS
I16D1, TAS Schedule 1TAS Schedule 1 TAS Schedule 1
Condensation in
Buildings
Tasmanian
Designers Guide— N/A TAS F8P1 TAS H4D9 N/A
Dairy Industry Act 1994 N/A TAS I4P1, TAS
I4D1, TAS I7D1N/A N/A
Disability (Access
to Premises – Buildings)
Standards2010 N/A TAS D4D14 N/A N/A
Disability
Discrimination Act
(Cth)1992 N/A TAS D1P10 N/A N/A
Early Childhood
Centre and
School Age Care
Facilities CodeN/A N/A TAS I5D2 N/A N/A
Education and
Care Services
National Law
(Application) Act2011 N/A TAS I16P1, TAS
I16P2, TAS I16P3,TAS I16D1, TAS Schedule 1TAS Schedule 1 N/A
Export Control
(Milk and Diary)
OrdersN/A N/A TAS I4D17 N/A N/A
Health Service
Establishments
Act2006 N/A TAS I9D1 N/A N/A
Hygienic
Production of Pet MeatN/A Technical Report
88TAS I6D2 N/A N/A
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 300
Table Notes
All legislation referenced in this Schedule is Tasmanian State Legislation unless noted otherwise. (1)
All referenced documents including legislation, codes, Australian Standards, guidelines and codes of practice are (2)
the version at the time of the project documentation approval, unless noted otherwise.No. Date Title Volume One Volume Two Housing
Provisions
Liquor Licensing
Act1990 N/A TAS I4P1, TAS
I4D1, TAS I5D1N/A N/A
Primary Produce
Safety Act2011 N/A TAS I4P1, TAS
I4D1, TAS I4D16N/A N/A
Water and
Sewerage
Industry Act2008 N/A TAS I4D3 N/A N/A
(1 May 2023)
Tasmania
NCC 2022 Volume Three - Plumbing Code of Australia Page 301
All legislative technical requirements affecting the design, construction or performance of plumbing installations are
consolidated into the Tasmanian Building Act and other legislative instruments under that Act by the adoption of all Parts
of the National Construction Code.TAS Footnote: Other legislation affecting buildings
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 302Schedule 10 Victoria
Introduction
Section A Governing requirements
Part A2 Compliance with the NCC
A2G2 Performance Solution
Section B Water services
Part B1 Cold water services
VIC B1D3 General requirements
Part B2 Heated water services
B2P3 Velocity
B2P4 Access and isolation
B2P7 Energy use and source
B2D2 Water heater in a heated water supply system
VIC B2D5 Maximum delivery temperature
VIC B2D6 Temperature control devices
Part B3 Non-drinking water services
B3P3 Velocity
VIC B3D3 General requirements
Part B4 Fire-fighting water services
B4P2 Access and isolation
VIC B4D2 General requirements
Part B6 Rainwater services
VIC B6P7 Rainwater service
B6D1 Deemed -to -Satisfy Provisions
VIC B6D2 General requirements
Part B7 Rainwater storage
B7P1 Contamination control
VIC B7P4 Identification
B7D1 Deemed -to -Satisfy Provisions
VIC B7D3 Identification
VIC B7D4 General requirements
Specification 41 Cross -connection hazards
S41C3 Protection types and hazard ratings
S41C4 Individual protection
VIC S41C6 Containment protection
Section C Sanitary plumbing and drainage systems
Part C1 Sanitary plumbing systems
VIC C1D3 General requirements
Part C2 Sanitary drainage systems
VIC C2P8 No point of connection
VIC C2V2 Pressure testing
VIC C2D4 General requirements
Part C3 On-site wastewater management
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 303C3P1 Health impacts
VIC C3P5 General requirements
VIC C3P6 Land application systems
VIC C3P7 Access for maintenance
VIC Part C4 Low risk on-site liquid trade waste systems
Objectives
VIC C4O1 Objective
Functional Statements
VIC C4F1 Functional statement
Performance Requirements
VIC C4P1 Requirements for low risk on -site liquid trade waste management
practices
Section D Excessive noise
Part D1 Excessive noise
D1F1 Excessive noise
D1D2 Undue noise
Section E Facilities and ancillary additions
VIC Part E2 Heating, ventilation and air conditioning systems
Objectives
VIC E2O1 Objective
Functional Statements
VIC E2F1 Functional statement 1
VIC E2F2 Functional statement 2
Performance Requirements
VIC E2P1 Design, construction, installation and maintenance
VIC E2P2 Pressure equipment
VIC E2P3 Microbial control
Deemed-to-Satisfy Provisions
VIC E2D1 Application
VIC E2D2 General requirements
VIC Part E3 Stormwater - Roof drainage systems
Objectives
VIC E3O1 Objective
Functional Statements
VIC E3F1 Functional statement
Performance Requirements
VIC E3P1 Roof drainage systems
VIC E3P2 Overflow
VIC E3P3 Watertightness
VIC E3P4 Design, construction and installation
Deemed-to-Satisfy Provisions
VIC E3D1 Application
VIC E3D2 General requirements
VIC Part E4 Stormwater - Surface and sub-surface drainage systems
Objectives
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 304VIC E4O1 Objective
Functional Statements
VIC E4F1 Functional statement
Performance Requirements
VIC E4P1 Surface drainage systems
VIC E4P2 Design, construction and installation
Deemed-to-Satisfy Provisions
VIC E4D1 Application
VIC E4D2 General requirements
Schedule 1 Definitions
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 305
This Appendix contains variations and additions to the Plumbing Code of Australia (PCA) provisions which are considered
necessary for the effective application of the Code in Victoria and shall be treated as amendments to the Code.VIC Introduction
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 306
Part A2 Compliance with the NCC
A2G2 Performance Solution
[2019: A2.2]
Insert subclause VIC A2G2(5) in clause A2G2 as follows:
(5) A Performance Solution cannot be used to satisfy a relevant Performance Requirement for the installation of a
combustible cladding product in an external wall of a—
Class 2, 3 or 9 building with a rise in storeys of 2 that does not comply with C2D6; and (a)
Class 2, 3, 5, 6, 7, 8 or 9 building with a rise in storeys of 3 or more. (b)Section A Governing requirements
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 307 Part B1 Cold water services
Delete B1D3 and insert VIC B1D3 as follows:
VIC B1D3 General requirements
[2019: VIC B1.4(1), (2) and (3)]
(1) A cold water service must be in accordance with AS/NZS 3500.1.
(2) Drinking water that is not intentionally heated must be delivered at a temperature of less than 40°C.
(3) A
hose tap must be provided in men’s public toilets adjacent to the urinals.
Part B2 Heated water services
B2P3 Velocity
[2019: BP2.3]
Delete B2P3(1) and insert VIC B2P3(1) as follows:
(1) The water velocity in heated water service pipework up to 65 °C must not exceed—
3 m/s for more than 1% of the time that water is required during the peak hour in non-circulatory heated water (a)
systems; and
1.2 m/s for the flow and 1.0 m/s for the return of a copper circulatory heated water service for more than 1% of ( b)
the time that water is required during the peak hour; and
1.0 m/s for the flow and return of a circulatory heated water service using other materials for more than 1% of ( c)
the time that the water is required during the peak hour.
B2P4 Access and isolation
[2019: BP2.3]
Delete B2P4(1) and insert VIC B2P4(1) as follows:
(1) Access must be available to the heated water service for maintenance of mechanical components and operational
controls.
B2P7 Energy use and source
[2019: BP2.6]
Insert subclause VIC B2P7(3) in clause B2P7 as follows:
(3) A solar water heater system installed in a new Class 1 building to comply with Part 2.6 and Part 3.12 of NCC 2019
V
olume Two must comply with the Plumbing Regulations 2018.
B2D2 Water heater in a heated water supply system
[2019: B2.2]
Insert subclause VIC B2D2(5) in clause B2D2 as follows:
(5) A solar water heater system installed in a new Class 1 building to comply with Part 2.6 and Part 3.12 of NCC 2019
V
olume Two must comply with the Plumbing Regulations 2018.Section B Water services
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 308Delete B2D5 and insert VIC B2D5 as follows:
VIC B2D5 Maximum delivery temperature
[2019: B2.5]
The delivery temperature of heated water at the outlet of each sanitary fixture must be—
not more than 45 °C in any— (a)
residential part of an aged care building ; or (i)
patient care area in a health-care building ; or (ii)
part of an early childhood centre , or primary or secondary school , that is used by children; or (iii)
designated accessible facility in a common area of a Class 2 building, or in any part of a Class 3 , Class 5 , (iv)
Class 6 , Class 7 , Class 8 , Class 9 a, 9b, 9c or Class 10 building; or
not more than 50 °C in all other cases. (b)
Applications
B2D5 applies to all heated water installations intended for personal hygiene.
Exemptions
B2D5(b) does not apply to the replacement of a water heater unit in the same location where the original installation
did not require a temperature control valve.
Explanatory Information
Scenarios covered in B2D5 may include where—
a heated water service is installed on the premises for the first time; or •
the water heater forming part of an existing heated water service is— •
replaced with a like-for-like water heater; or ◾
replaced with a different type of water heater; or ◾
relocated, and is reconnected to, some or all of the sanitary fixtures to which it was previously connected; or ◾
more than one existing sanitary fixture is replaced with new similar fixtures; or •
an existing heated water service on the premises is altered or extended to serve additional sanitary fixtures. •
Consideration should be given to the intended occupants of a building when commissioning the heated water delivery
temperature. For example, if the occupants of a Class 1 building are older adults or young children, a lower temperature
than specified in B2D5(b) should be considered.
Delete B2D6 and insert VIC B2D6 as follows:
VIC B2D6 Temperature control devices
[2019: B2.6]
(1) A temperature control device used to deliver heated water in accordance with B2D5(a) must be a—
(a) thermostatic mixing valve; or
(b) thermostatically controlled tap.
(2) A temperature control device used to deliver heated water in accordance with B2D5(b) must be a—
thermostatic mixing valve; or (a)
thermostatically controlled tap; or (b)
tempering valve; or (c)
temperature limited water heater. (d)
(3) The required maximum delivery temperature must be achieved in accordance with AS/NZS 3500.4. B2D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 309(4) Thermostatic mixing valve work must comply with AS 4032.3 Water Supply - Valves for the control of heated water
supply temperatures - Part 3: Requirements for field testing, maintenance or replacement of thermostatic mixing
valves, tempering valves and end of line temperature control devices.
Applications
B2D6 applies to all heated water installations intended for personal hygiene.
Explanatory Information
Scenarios covered by B2D6 may include where—
• a heated water service is installed on the premises for the first time; or
• the water heater forming part of an existing heated water service is—
• replaced with a like-for-like water heater; or
• replaced with a different type of water heater; or
• relocated, and is reconnected to, some or all of the sanitary fixtures to which it was previously connected; or
• more than one existing sanitary fixture is replaced with new similar fixtures; or
• an existing heated water service on the premises is altered or extended to serve additional sanitary fixtures.
Part B3 Non -drinking wat er services
B3P3 Velocity
[2019: BP3.3]
Delete B3P3(1) and insert VIC B3P3(1) as follows:
(1) Non-drinking water services must ensure that pipework water velocity does not exceed 3 m/s for more than 1% of
the time that the water is required during the annual peak hour.
Delete B3D3 and insert VIC B3D3 as follows:
VIC B3D3 General requirements
[2019: VIC B3.3]
A non-drinking water service must be in accordance with AS/NZS 3500.1, subject to the following:
Substitute the text of clause 9.7.1(a) as follows: (a) be of a type that has a removable handle. (a)
Substitute the text of clause 9.7.1(c) as follows: (c) have a non-standard inlet connecting thread and a standard (b)
hose connection outlet.
Part B4 Fire -fighting wat er services
B4P2 Access and isolation
[2019: BP4.1]
Delete B4P2(2) and insert VIC B4P2(2) as follows:
(2) A fire-fighting water service must ensure the system can be isolated for testing and maintenance and have adequate
provision for required flow testing ( drainage ). VIC B2D6
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NCC 2022 Volume Three - Plumbing Code of Australia Page 310Delete B4D2 and insert VIC B4D2 as follows:
VIC B4D2 General requirements
[2019: Vic B4.2]
(1) Fire-fighting water services for Class 2 to Class 9 buildings and structures must comply with the requirements of Part
E1 of Volume One of the NCC.
(2) The installation of a fire-fighting water service must be in accordance with AS/NZS 3500.1.
(3) When installed in Class 1 or Class 10 buildings and structures, an automatic fire sprinkler system must be in
accordance with AS 2118.1, AS 2118.4, or AS 2118.5 as appropriate.
(4) Fire-fighting water service work must be in accordance with—
AS/NZS 1530.3, (a)
AS 4118.1.1, (b)
AS 4118.1.2, (c)
AS 4118.1.3, (d)
AS 4118.1.4, (e)
AS 4118.1.5, (f)
AS 4118.1.6, (g)
AS 4118.1.7, (h)
AS 4118.1.8, (i)
AS 2941, (j)
AS 2118.2, (k)
AS 2118.3, (l)
AS 2118.8, (m)
AS 2118.10; and (n)
AS 1851 as appropriate. (o)
Part B6 Rainwater services
Insert VIC B6P7 as follows:
VIC B6P7 Rainwater service
[New for 2022]
A rainwater service must—
avoid the likelihood of contamination of water within the rainwater service , the cold water service, or the Network (a)
Utility Operator’s drinking water supply (if connected); and
not pose a hazard to public health; and (b)
not have an unprotected cross-connection with any Network Utility Operator’s drinking water service. (c)
B6D1 Deemed -to-Satisfy Pr ovisions
[2019: B6.1]
Delete B6D1(1) and insert VIC B6D1(1) as follows:
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B6P1 to B6P7 are satisfied by
complying with B6D2 to B6D6 . B4P2
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NCC 2022 Volume Three - Plumbing Code of Australia Page 311Delete B6D2 and insert VIC B6D2 as follows:
VIC B6D2 General requirements
[New for 2022 (2019: Volume Two V2.6.1 and V13.12.0)]
A rainwater service must comply with
Section 15
of AS/NZS 3500.1.Notes
The Victorian NCC 2019 rainwater tank variation (VIC V2.6.1 and V3.12.0 respectively) remains in effect until 30
September 2023 after which the following takes effect:
A rainwater tank must be installed in a Class 1 building in accordance with the regulations made under the Building Act
1993 (Victoria).
See Part B7 clause B7D4.
Part B7 Rainwater storage
B7P1 Contamination control
[2019: BP6.1]
Delete B7P1(1) and insert VIC B7P1(1) as follows:
(1) Rainwater storage must reduce the likelihood of contamination within the rainwater storage system, the cold water
service and the Network Utility Operator’s drinking water supply (if connected).
Delete B7P1(2) and insert VIC B7P1(2) as follows:
(2) Rainwater storage must not pose a hazard to public health.
Delete B7P4 and insert VIC B7P4 as follows:
VIC B7P4 Identification
[2019: BP6.4]
Rainwater storage and holding tanks used only for non-drinking purposes must be clearly identified.
B7D1 Deemed -to-Satisfy Pr ovisions
[2019: B6.1]
Delete B7D1(1) and insert VIC B7D1(1) as follows:
(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements B7P1 to B7P4 are satisfied by
complying with B7D2 and B7D4 .
Delete B7D3 and insert VIC B7D3 as follows:
VIC B7D3 Identification
[2019: B6.5]
The rainwater storage must be identified as rainwater in accordance with AS/NZS 3500.1.
Insert VIC B7D4 as follows:
VIC B7D4 General requirements
[New for 2022 (2019: Volume Two V2.6.1 and V3.12.0)]
Rainwater storage must—
comply with AS/NZS 3500.1; and (a)
not have an unprotected cross-connection with any Network Utility Operator’s drinking water service or with any (b)B6D1
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NCC 2022 Volume Three - Plumbing Code of Australia Page 312non-drinking water service; and
comply with Part B1 where any cold water service from a Network Utility Operator’s drinking water supply (c)
connects to a rainwater storage system or to a switching device.
Notes
The Victorian NCC 2019 rainwater tank variation (VIC V2.6.1 and V3.12.0 respectively) remains in effect until 30
September 2023 after which the following takes effect:
A rainwater tank must be installed in a Class 1 building in accordance with the regulations made under the Building Act
1993 (Victoria).
Specification 41 Cross -connection hazar ds
S4 1C3 Protection types and hazard ratings
[2019: BS5.1.3]
Delete S41C3(3) and insert VIC S41C3(3) as follows:
(3) Pipework and outlets supplied by a drinking water source downstream of an individual protection or zone protection
backflow prevention device are considered to convey drinking water from an unprotected water service .
S41C4 Individual protection
[2019: BS5.1.4]
Delete S41C4(3) and insert VIC S41C4(3) as follows:
(3) The following are High Hazard for the purpose of individual protection :
Chlorinators. (a)
Coils and jackets in heat exchangers, in unsealed and toxic environments. (b)
Steam calorifiers. (c)
Steam boilers . (d)
Antibiotic injectors (agricultural). (e)
Bidets and toilet douche seats where the outlet in any position is not 25 mm above the overflow level of the pan. (f)
Bidettes installed without a minimum 25 mm air gap. (g)
Handheld bidet / douche hoses and trigger sprays. (h)
Chemical dispensers (high toxicity). (i)
Cooling towers. (j)
Demineralising equipment using ion-exchange resins with acid and alkali regeneration. (k)
Equipment used for handling, mixing, measuring and processing chemical and microbiological substances. (l)
Fogging and cleaning sprays with chemical injection or additives. (m)
Mixing of chemicals. (n)
Pan washing apparatus. (o)
Photographic developers with drinking water supply rinse tanks or mixing facilities. (p)
Plants with auxiliary non-drinking water supplies. (q)
Type D irrigation system injected with fertilisers, herbicides, nematicides, insecticides or weedicides. (r)
Weed and pest spraying and water cartage tanks. (s)
Portable and mobile tankers. (t)
Placenta / surgical waste disposal units. (u)
Food preparation or food storage tanks, vats or vessels (with clean-in-place systems). (v)VIC B7D4
(1 May 2023)
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NCC 2022 Volume Three - Plumbing Code of Australia Page 313Buried rainwater tank . (w)
Delete S41C6 and insert VIC S41C6 as follows:
VIC S41C6 Containment protection
[2019 BS5.1.6]
(1) The following are Low Hazard for the purpose of containment protection :
A water service provided to a Class 1 , Class 2 , Class 7a or Class 10 building where— (a)
not more than 12 persons reside; and (i)
the building may only use non-commercial amounts of cleaning products. (ii)
Premises served by a rainwater harvesting system, not including any rainwater storage tanks that are buried (b)
tanks .
Properties with only a drinking water service provided by a Network Utility Operator . (c)
Properties served by a Network Utility Operator’s recycled water supply. (d)
(2) The following are Medium Hazard for the purpose of containment protection :
A water service provided to a Class 3 , Class 4 , Class 5 , Class 6 or Class 7b building where chemicals are not (a)
stored.
A water service provided to a property that has— (b)
other non-drinking water services; or (i)
a separate fire water service. (ii)
(3) The following are High Hazard for the purpose of containment protection :
A water service provided to a Class 7b building where chemicals may be stored. (a)
A water service provided to a Class 8 or Class 9 building. (b)
A water service provided to a property used for commercial agriculture, farming, turf irrigation, industrial, (c)
processing or chemical industries.
A water service provided to a property that has non-drinking water services from multiple sources with potential (d)
for health related contamination.
Applications
Medium Hazard properties for the purpose of containment protection include the following— (a)
Caravan parks. (i)
Food and beverage processing plants. (ii)
Marinas. (iii)
Premises that are connected to a grey water re-use system or a reticulated and disinfected reclaimed water (iv)
system.
Public swimming pools . (v)
High Hazard properties for the purpose of containment protection include the following— (b)
Abattoirs. (i)
Car and plant washing facilities. (ii)
Chemical laboratories. (iii)
Chemical plants. (iv)
Factories using, processing or manufacturing toxic chemicals. (v)
Hospitals, mortuaries, dental surgeries, clinics or day surgeries and the like containing patient care areas (vi)
such as an operating theatre, minor procedures consultation room, resuscitation, intensive care and coronary
care.
Metal finishing plants. (vii)S41C4
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NCC 2022 Volume Three - Plumbing Code of Australia Page 314Pathology laboratories. (viii)
Petroleum processing and storage plants and facilities. (ix)
Piers, docks and other waterfront facilities. (x)
Premises where access to conduct inspections is restricted. (xi)
Sanitary depots. (xii)
Sewerage treatment plants and sewerage lift stations. (xiii)
Universities. (xiv)
Premises containing wastewater dump points. (xv)
Industrial processing. (xvi)
Chemical industries. (xvii)
Explanatory Information
Clause (2)(a); building classes 3, 4, 5, 6, and 7b are likely to have greater than 12 occupants (residents and/or •
workers) and may contain moderate amounts of cleaning or commercial chemicals, or a separate fire-fighting water
service.
Clause (3)(b) and (3)(c); a property presents a risk from wastewater effluent irrigation system , process water and/or •
bore water. The property has an increased potential for cross-connection between drinking water and non-drinking
water with high consequences such as chemicals, recycled sewerage, medical, biological, toxic or hazardous
substances.
In some jurisdictions, regulations issued under water supply legislation, and/or rules set by a Network Utility •
Operator , may prescribe containment protection which differs from this Specification. If this occurs then those
regulations and/or rules should be followed in place of this Specification. This Specification only applies for the
purposes of compliance with Volume Three of the NCC. It is not intended to limit or extend the application of other
regulations. VIC S41C6
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NCC 2022 Volume Three - Plumbing Code of Australia Page 315 Part C1 Sanitary plumbing systems
Delete C1D3 and insert VIC C1D3 as follows:
VIC C1D3 General requirements
[2019: VIC C1.3]
A sanitary plumbing system must be in accordance with AS/NZS 3500.2 subject to the following:
For Class 1 buildings, substitute Clause 6.6.2.4.2 as follows: (
a)
6.6.2.4.2 New installations: Where a junction is used to make the connection of a DN 100 branch pipe to (
i)
another DN 100 pipe, the entry level of the branch pipe shall be elevated at an incline of not less than 15°
above the horizontal. Where the 15° requirement cannot be achieved, the incline must be as close as
possible to 15° to avoid stranding. Where a fixture is connected to a graded discharge pipe, the installation
shall also be in accordance with Clause 6.6.2.1.
After clause 13.9(b), delete the following: Where a bath trap is not accessible, the bath shall discharge untrapped (
b)
to a floor waste gully (FWG) in accordance with Table 4.6.7.2 and Appendix B.
After clause 15.1, insert clause 15.1A
as follows: When tested, the respective sections of any soil pipe, waste (
c)
pipe, vent pipe or above-ground drain must be free of leaks when subjected to an air test in accordance with
clause 15.3.
Substitute clause 15.3.3 as follows: When tested, the respective sections of any soil pipe, waste pipe, vent pipe (
d)
or above ground drain must be free of leaks when subjected to an air test in accordance with clause 15.3.2 over
the minimum test duration specified in
Table 15.3.2.
Part C2 Sanitary drainage systems
Insert VIC C2P8 as follows:
VIC C2P8 No point of connection
[New for 2022]
Where a point of connection to a Network Utility Operator’s sewerage system is not available, an on-site wastewater
management system must be designed, installed and maintained in accordance with the requirements and agreement of
the relevant authority having jurisdiction.
Delete C2V2 and insert VIC C2V2 as follows:
VIC C2V2 Pressure testing
This clause has deliberately been left blank.
Delete C2D4 and insert VIC C2D4 as follows:
VIC C2D4 General requirements
[2019: VIC C2.4(1) to (5)]
(1) A sanitary drainage system must be in accordance with AS/NZS 3500.2; subject to the following—
insert Clause 4.4.2.1(e): (e) Where an inspection shaft or boundary trap riser in a below ground sanitary drainage (a)
system is located clear of a building and is not likely to be damaged by vehicular traf
fic, a light cover must be
installed in accordance with clause 4.4.2.1(a) and clause 4.4.2.1(c)(ii) and (iii).
insert Clause 4.6.2(d): (d) Have risers installed vertically with no of
fsets. (
b)
clause 5.3(c) of AS/NZS 3500.2 is varied so that concrete support used to support drains must be provided to (
c)
support all bends greater than DN 65 to vertical risers.Section C Sanitary plumbing and drainage systems
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NCC 2022 Volume Three - Plumbing Code of Australia Page 316replace Clause 5.4.2(d) with: Free running sand, excavated from the trench, capable of passing through a 2 mm ( d)
mesh sieve, which does not contain clay, organic or other deleterious materials.
Insert Clause 15.1(b) as follows:
Testing of a sanitary drainage installation. If installed at a property provided (
e)
with non-drinking water by the Network Utility Operator , testing of a sanitary drainage installation may be carried
out in accordance with—
a water test using non-drinking water provided by the Network Utility Operator in accordance with clause ( i)
15.2; or
an air test in accordance with clause 15.3; or (
ii)
vacuum test in accordance with clause 15.4; or (
iii)
in cases other than in (a), testing may be carried out by way of— (
iv)
an air test in accordance with clause 15.3; or (
A)
a vacuum test in accordance with clause 15.4. (
B)
(2) Discharge pipes measuring DN 50 or smaller must not be installed in a below ground sanitary drainage system,
except for discharge pipes connected to floor waste gullies or vertical riser from a graded drain.
Part C3 On-site wastewater management
C3P1
Health impacts
[New for 2022]
Delete C3P1(1) and insert VIC C3P1(1) as follows:
(1) On-site wastewater management systems must protect public health by ensuring that—
risks associated with the discharge of treated wastewater and/or the end product from a composting toilet to the (
a)
environment are minimised; and
foul air and gasses are prevented from accumulating within or entering into buildings; and (
b)
the likelihood of contamination of the drinking water supply is avoided, and ( c)
it complies with the requirements of the authority having jurisdiction. (
d)
Delete C3P5 and insert VIC C3P5 as follows:
VIC C3P5 General requirements
[New for 2022]
On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater must
be designed, constructed, installed, replaced, repaired, altered and maintained—
with required treatment and storage capacity for the volume and make up of waste and frequency of discharge ( a)
for disposal; and
with required size, strength and rigidity for the nature, flow rates, volume of wastes and/or waste products which ( b)
must be processed; and
using materials which are impervious both to the waste for which disposal is required and to water; and (
c)
to avoid the likelihood of surface water and stormwater entering the system; and ( d)
in accordance with the requirements and agreement of the relevant authority having jurisdiction. (
e)
Delete C3P6 and insert VIC C3P6 as follows:
VIC C3P6 Land application systems
[New for 2022]
(1) On-site wastewater management systems and associated land application systems must—
complete the treatment, uptake and absorption of the final ef
fluent within the boundaries of the approved area; (
a)
andVIC C2D4
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NCC 2022 Volume Three - Plumbing Code of Australia Page 317protect against internal contamination; and (b)
provide ventilation to avoid the likelihood of foul air and gases from accumulating in the system; and (c)
transfers wastes safely and hygienically. (d)
(2) On-site wastewater management systems and associated land application systems must—
avoid the likelihood of the creation of unpleasant odours or the accumulation of offensive matter; and (a)
avoid the likelihood of stormwater run-off entering the system; and (b)
avoid the likelihood of root penetration or ingress of ground water entering the system; and (c)
avoid the likelihood of unintended or uncontrolled discharge ; and (d)
avoid the likelihood of blockage and leakage; and (e)
avoid the likelihood of damage from superimposed loads or ground movement; and (f)
avoid the likelihood off effluent and foul air and gasses entering the building. (g)
(3) The on-site wastewater management system and associated land application system continue to meet the above
requirements throughout its serviceable life.
Delete C3P7 and insert VIC C3P7 as follows:
VIC C3P7 Access for maintenance
[New for 2022]
(1) On-site wastewater management systems that facilitate on-site storage, treatment, disposal or re-use of wastewater
must—
provide vehicle access for collection, if necessary; and (a)
avoid the likelihood of unauthorised access by people; and (b)
provide safe access for cleaning, clearing blockages, maintenance, measurement and performance sampling. (c)
(2) Land application systems must—
provide safe access, as required, for clearing blockages and maintenance; and (a)
incorporate provisions, as required, for effective cleaning. (b)VIC C3P6
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NCC 2022 Volume Three - Plumbing Code of Australia Page 318
Introduction to this Part
2019: Vic Part H1
This Part sets out the requirements for the design, construction, installation, replacement, repair,
alteration and maintenance of any part of a low risk on-site liquid trade waste system.
VIC C4O1 Objective
[2019: HO1]
The Objective of this part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a low risk on-site (a)
liquid trade waste installation; and
ensure that a low risk on-site liquid trade waste installation (including an installation provided for use by people (b)
with a disability) is suitable; and
conserve water and energy; and (c)
safeguard the environment; and (d)
safeguard public and private infrastructure; and (e)
ensure that a low risk on-site liquid trade waste installation is designed and is capable of being maintained so (f)
that throughout its serviceable life it will continue to satisfy Objectives (a) to (e).
VIC C4F1 Functional statement
[2019: HF1.1 and HF1.2]
(1) Where liquid trade waste is generated, adequate space and facilities must be provided for the safe and hygienic
collection, holding, treatment and/or disposal of the waste.
(2) Low risk on-site liquid trade waste systems must process liquid trade waste generated from an industry, business,
trade or manufacturing process so that public health and environmental standards required by the authority having
jurisdiction and/or particular requirements of the receiving Network Utility Operator , where applicable, are achieved.
VIC C4P1 Requirements for low risk on -sit e liquid trade waste management practices
[2019: HP1.1]
(1) A low risk liquid trade waste appliance must—
be located as close as practicable to the fixtures that it serves and if of the portable type must be installed above (a)
ground; and
be fitted with a cover which is able to withstand vehicular or pedestrian traffic or other loads likely to be imposed (a)
on it and is readily removable by one person; and
be constructed of materials suitable for the nature of the wastes likely to be discharged through the appliance. (a)
(2) A low risk liquid trade waste appliance must— VIC Part C4 Low risk on-site liquid trade waste systems
Objectives
Functional Statements
Performance Requirements
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NCC 2022 Volume Three - Plumbing Code of Australia Page 319if fitted with an airtight cover, be provided with a DN 32, DN 50 or DN 80 sized vent as nominated by the relevant ( a)
Network Utility Operator ; and
be provided with the following outlet ventilation— (
b)
if installed outside a building, a DN 100 sized riser off a disconnector gully in accordance with clause 4.6.2 (
i)
of AS/NZS 3500.2;
if not of the portable type and installed inside a building, a DN 50 sized vent of
f a disconnector gully in (
ii)
accordance with clause 4.6.5 of AS/NZS 3500.2; and
if of the portable type installed inside a building, a DN 50 sized vent of
f a DN 80 sized trap riser in (
iii)
accordance with clause 4.6.5 of AS/NZS 3500.2.
(3) If a low risk liquid trade waste appliance and outlet vent are interconnected, the interconnection must be in accordance
with clause 6.9.3 of
AS/NZS 3500.2.
(4) The outlet from a low risk liquid trade waste appliance must—
if of the portable type receiving a hydraulic loading of up to 5 fixture units, be a minimum size of DN 50; or (
a)
if of the portable type receiving a hydraulic loading of more than 5 fixture units, be a minimum size of DN 80; or (
b)
in cases other than that in (a) or (b), be a minimum size of DN 100; and (
c)
have a separate trap, of the same size as the outlet pipe, installed at its outlet. (
d)
(5) In this clause hydraulic loading means the rate of discharge imposed on a sanitary plumbing installation and is
measured in fixture units; low risk liquid trade waste means water-borne discharges other than sewage that are
classified by an
Authority within the meaning of the Water Act 1989 as being of low risk from causing harm to the
environment and the assets of that
Authority; low risk liquid trade waste appliance means an appliance that traps and
partially treats low risk liquid trade waste and prevents it from entering the sewerage system.
Notes
The relevant Authority under the Water Act 1989 or the holder of a licence under the Water Industry Act 1994 may
specify conditions of connection to a sewer for low risk trade waste to enter that sewer and may also require that the
waste passes through a low risk liquid trade waste appliance of a type nominated by the Authority or holder of a licence
before it enters the sewer. VIC C4P1
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NCC 2022 Volume Three - Plumbing Code of Australia Page 320
Part D1 Excessive noise
D1F1 Excessive noise
[2019: DF1]
Delete D1F1(1) and insert VIC D1F1(1) as follows:
(1) A plumbing and drainage system must be designed and installed so as to operate in a way that avoids the likelihood
of excessive noise of any part of the plumbing and drainage system, and minimises any adverse impact on building
occupants.
D1D2 Undue noise
[2019: D1.2]
Delete D1D2(1) and insert VIC D1D2(1) as follows:
(1) To prevent undue noise, plumbing and drainage systems must comply with—
B1D3 for cold water services; or (a)
B2D9 for heated water services; or (b)
B3D3 for non-drinking water services; or (c)
B4D2 for fire-fighting water services; or (d)
B6D2 for rainwater services ; or (e)
B7D4 for rainwater storage , or (f)
C1D3 for sanitary plumbing systems; or (g)
C2D4 for sanitary drainage systems, or (h)
C3D2 , C3D3 , C3D4 , C3D5 , C3D6 and C3D7 for on-site wastewater management systems , or (i)
E3D2 for stormwater drainage systems, and (j)
E4D2 for surface and sub-surface drainage systems. (k)Section D Excessive noise
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NCC 2022 Volume Three - Plumbing Code of Australia Page 321
Section E Facilities and ancillary additions
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NCC 2022 Volume Three - Plumbing Code of Australia Page 322Introduction to this Part
This Part sets out the requirements for the design, construction, installation, replacement, repair, alteration and
maintenance of mechanical heating, cooling and ventilation systems.
VIC E2O1 Objective
[2019: GO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a heating, ventilation ( a)
or air-conditioning installation; and
ensure that a heating, ventilation or air-conditioning installation is suitable; and (
b)
conserve water and energy; and (
c)
safeguard the environment; and (
d)
safeguard public and private infrastructure; and (
e)
ensure that a heating, ventilation or air-conditioning installation is designed and is capable of being maintained (
f)
so that throughout its serviceable life it will continue to satisfy Objectives (a) to (e).
VIC E2F1 Functional statement 1
[2019: GF1.1]
Mechanical services, plant and equipment used for heating, cooling and/or ventilation of a building must be adequate.
VIC E2F2 Functional statement 2
[2019: GF2.2]
A building’s heating, cooling and/or ventilation system installation and maintenance must support energy efficient
outcomes and minimise any adverse impact on building occupants or occupants of adjoining places, the Network Utility
Operator’s infrastructure, property and the environment.
VIC E2P1 Design, construction, installation and maintenance
[2019: GP1.1]
(1) Mechanical services, or plant and equipment for heating, cooling and/or ventilation must avoid the following:
Damage to property
. (
a)
Loss of amenity to occupants. ( b)
(2) Mechanical services, or plant and equipment for heating, cooling and/or ventilation must ensure the following:
Ef
ficient use of energy and water. (
a)
Access for maintenance. (
b)VIC Part E2 Heating, ventilation and air conditioning systems
Objectives
Functional Statements
Performance Requirements
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NCC 2022 Volume Three - Plumbing Code of Australia Page 323 VIC E2P2 Pressure equipment
[2019: GP1.2]
Pressure equipment used in mechanical heating, cooling or ventilation systems must avoid the likelihood of explosion,
rupture or leakage.
VIC E2P3 Microbial control
[2019: GP1.3]
Mechanical air-handling and cooling water systems installed in a building must control the accumulation of harmful microbial
growth.
VIC E2D1 Application
[2019: G1.2]
Performance requirements E2P1 to E2P3 are satisfied by complying with E2D2.
VIC E2D2 General requirements
[2019: G1.2]
(1) Mechanical ventilation and air-conditioning systems for buildings and structures must comply with the requirements
of the relevant Parts of:
NCC V
olume One for Class 2 to 9 Buildings; or (
a)
NCC Volume Two for Class 1 and 10 Buildings. (
b)
(2) Mechanical ventilation and air-conditioning equipment must be in accordance with:
AS/NZS 1200 for the design, materials, manufacture, examination, testing, installation, commissioning, operation, (
a)
inspection, maintenance, repair, alteration, and disposal of pressure equipment,
AS 1324.1 for the application, performance and construction for air filters for use in general ventilation and air- (
b)
conditioning,
AS 1345 for the identification of the contents of pipes, conduits and ducts, (
c)
AS/NZS 1668.1 for the use of mechanical ventilation and air-conditioning in buildings for fire and smoke control (
d)
in multi-compartment buildings,
AS 1668.2 for the use of mechanical ventilation and air-conditioning in buildings for mechanical ventilation, (
e)
AS/NZS 3500.1 for the design, installation, alteration, addition, repair and commissioning of cold water services, (
f)
AS/NZS 3500.2 for the design, installation, alteration, addition and repair of sanitary plumbing and drainage, (
g)
AS/NZS 3500.4 for the design, installation, commissioning, alteration, addition and repair of heated water (
h)
services,
AS 4254.1 for flexible ductwork for air-handling systems in buildings, (
i)
AS 4254.2 for the rigid ductwork for air-handling systems in buildings, (
j)
AS 4426 for the selection, installation and finish of thermal insulation of pipework, ductwork and equipment. (
k)
AS 4508 for the thermal resistance of insulation for ductwork used in building airconditioning, and (
l)
AS/NZS 5141 for residential heating and cooling systems. (
m)
AS/NZS 5601.1 for gas installations. (
n)
AS 1271, AS 1358 and AS 4041 for the design, construction, installation, replacement, repair, alteration and (
o)
maintenance of pressure equipment and piping.
AS/NZS 4859.1 for thermal insulation of ductwork and pipework. (
p)
HB 276 for the design, supply, installation, testing and commissioning of mechanical ventilation and air (
q)
conditioning systems in class 1, 2, 3 and 4 buildings.Deemed -to-Satisfy ProvisionsVIC E2P2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 324AS/NZS ISO 817 in relation to assigning designations for refrigerants used in air conditioning systems. (r)
AS/NZS 5149.1, AS/NZS 5149.2, AS/NZS 5149.3 and AS/NZS 5149.4 for the design, construction, installation, (s)
testing, commissioning, operation, maintenance, repair and safety of refrigeration systems (including heat pumps)
and recovery, reuse and disposal of refrigerants.
Australian and New Zealand Refrigerant handling code of practice 2007 Part 1 for selfcontained low charged (t)
refrigeration systems.
Australian and New Zealand Refrigerant handling code of practice 2007 Part 2 forsystems other than self- (u)
contained low charged systems.
(3) Copper piping for air-conditioning and refrigeration must meet the requirements of AS/NZS 1571.
(4) Microbial control must be carried out in accordance with AS/NZS 3666.1 and AS/NZS 3666.2 as appropriate.
(5) Condensate drains and bleed down drains installed in heating, cooling and air-conditioning equipment (including
evaporative coolers) other than cooling towers must discharge to any of the following—
an evaporative tray if specified by the manufacturer; or (a)
a sanitary drainage system by way of an untrapped tundish discharging to a charged floor waste gully in (b)
accordance with clause 4.6.7.8 or tundish and self-sealing device in accordance with clause 13.21 of AS/NZS
3500.2; or
a surface water drainage system; or (c)
an absorption pit, but only if a sanitary or surface water drainage system is not available and the discharge water (d)
will not cause damage to buildings or facilities by changing soil moisture conditions.
a stormwater downpipe directly over the connection to the roof gutter; or (e)
Directly to the stormwater downpipe below the connection to the roof gutter provided a means of overflow or (f)
reverse flow protection is incorporated; or
for evaporative coolers only, over a tiled roof, by way of a spreader. (g)
(6) Drains from a cooling tower must discharge to a sanitary drainage system in accordance with any applicable trade
waste agreement.
(7) Condensate drains and bleed down drains shall not discharge to a system that is used for the collection of water for
potable use.
(8) In this clause, bleed down drain means a drain that collects fluid from a valve used for bleeding and purging;
evaporative tray means a tray used to gather excess moisture or condensation for the purpose of evaporation.
(9) Domestic solid fuel burning appliances must be in accordance with AS/NZS 2918.
(10) Medical gas systems must be in accordance with AS 2896, AS 2473.3, AS 2568, and AS 2902.VIC E2D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 325Introduction to this Part
This Part sets out the requirements for the design, construction, installation, replacement, repair, alteration and
maintenance of any part of a roof drainage system
VIC E3O1 Objective
[2019: FO1]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a roof drainage ( a)
installation; and
ensure that a roof drainage installation is adequate; and (
b)
conserve water and energy; and (
c)
safeguard the environment; and (
d)
safeguard public and private infrastructure; and (
e)
ensure that a roof drainage installation is designed and is capable of being maintained so that throughout its (
f)
serviceable life it will continue to satisfy Objectives (a) to (e).
VIC E3F1 Functional statement
[2019: FF1.1]
Buildings are to be provided with a roof drainage installation constructed to provide protection for people, property and
the environment from the adverse effects of stormwater.
VIC E3P1 Roof drainage systems
[2019: FP1.1]
A roof drainage system must dispose of stormwater flows from rainfall events having an average recurrence interval
appropriate to:
The importance of the building. (
a)
The severity of potential damage to property, loss of amenity , illness or injury that would result from the failure ( b)
of the system.
VIC E3P2 Overflow
[2019: FP1.1]
A roof drainage system must provide an overflow device to transfer stormwater flows generated by extreme rainfall events. VIC Part E3 Stormwater - Roof drainage systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 326 VIC E3P3 Watertightness
[2019: FP1.1]
All internal roof drainage components must be watertight.
VIC E3P4 Design, construction and installation
[2019: FP1.4]
(1) A roof drainage system must ensure the following—
Stormwater is transferred to a point of connection . (a)
Access for maintenance and clearing blockages . (b)
(2) A roof drainage installation must avoid the following—
Loss of amenity due to blockages and uncontrolled discharge . (a)
Foul air and gases accumulating in the roof drainage system. (b)
Loss to buildings and property amenity due to blockages and uncontrolled discharge . (c)
VIC E3D1 Application
[2019: F1D1]
Performance Requirements E3P1 to E3P4 are satisfied by complying with E3D2.
VIC E3D2 General requirements
[2019: F1D2]
The design, construction, installation, replacement, repair, alteration and maintenance of a roof drainage system must be
in accordance with AS/NZS 3500.3 and SA HB 39, subject to following:
Insert Clause 4.9.6.3 Fastening in AS/NZS 3500.3 as follows: Dowpipes to be securely fastened to walls and (a)
structures so as to withstand movement due to thermal expansion or weight due to a partial or total blockage,
and
Where there are any conflicts between AS/NZS 3500.3 and SA HB 39, AS/NZS 3500.3 prevails. (b)Deemed -to-Satisfy ProvisionsVIC E3P3
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 327Introduction to this Part
This Part sets out the requirements for the design, construction, installation, replacement, repair, alteration and
maintenance of any part of a surface drainage system to the point of connection.
VIC E4O1 Objective
[2019: FO2]
The Objective of this Part is to—
safeguard people from illness, injury or loss (including loss of amenity ) due to the failure of a drainage ( a)
installation;
ensure that a stormwater drainage installation is adequate; and (
a)
conserve water and energy; and (
b)
safeguard the environment; and (
c)
safeguard public and private infrastructure; and (
d)
ensure that a stormwater drainage installation is designed and is capable of being maintained so that throughout (
e)
its serviceable life it will continue to satisfy Objectives (a) to (e).
VIC E4F1 Functional statement
[2019: FF2.1]
Buildings and their surroundings are to be provided with a surface drainage and subsurface drainage installation and
be constructed in such a manner as to provide protection for people, property and the environment from the adverse
effects of stormwater.
VIC E4P1 Surface drainage systems
[2019: FP2.1]
A surface drainage system must dispose of stormwater flows from rainfall events having an average recurrence interval
appropriate to:
The importance of the building. (
a)
The severity of potential damage to property, loss of amenity , illness or injury that would result from the failure ( b)
of the system.
VIC E4P2 Design, construction and installation
[2019: FP2.2]
(1) A surface drainage installation must avoid the following:
Blockage and uncontrolled discharge . ( a)VIC Part E4 Stormwater - Surface and sub-surface drainage systems
Objectives
Functional Statements
Performance Requirements
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 328Damage from root penetration, superimposed loads or ground movement. (b)
Entry of sewage and/or liquid trade waste. (c)
Entry of stormwater into a sanitary drainage . (d)
Damage to the Network Utility Operator’s drainage system (e)
Foul air and gases accumulating in the stormwater system. (f)
Loss to buildings or property. (g)
(2) A surface drainage installation must ensure the following:
Access for maintenance and clearing blockages . (a)
Stormwater is transferred to a point of connection . (b)
VIC E4D1 Application
[2019: F2D1]
Performance Requirements E4P1 to E4P2 are satisfied by complying with E4D2.
VIC E4D2 General requirements
[2019: F2D2]
The design, construction, installation, replacement, repair, alteration and maintenance of surface and subsurface drainage
systems must be in accordance with AS/NZS 3500.3.Deemed -to-Satisfy ProvisionsVIC E4P2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 329
Children’s service: Has the same meaning as it has under the Children’s Services Act 1996, but excludes a service
where education and care is primarily provided to school aged children.
Combustible cladding product: Means—
aluminium composite panels (ACPs) with a core of less than 93 per cent inert mineral filler (inert content) by (
a)
mass in external cladding as part of a wall system; and
expanded polystyrene (EPS) products used in an external insulation and finish (rendered) wall system. (
b)
Early childhood centre
Includes—
any premises, or part thereof, providing or intending to provide a centre-based education and care service within (
a)
the meaning of the Education and Care Services National Law Act 2010, and the Education and Care Services
National Regulations, excluding a service where education and care is primarily provided to school aged children;
and
a children’s service . ( b)
Flashing
A strip or sleeve of impervious material dressed, fitted or built-in to provide a barrier to water movement, or to divert the
travel of water, or to cover a joint where water would otherwise penetrate to the interior of a building, and includes
the following:
Perimeter flashing: a flashing used at the floor-wall junction. (
a)
Vertical flashing: a flashing used at wall junctions within shower areas . ( b)
Roof flashing: a rigid or flexible material, usually metal, fixed over, against or built into an abutment to form a (
c)
weathertight joint.
Flood hazard area
The site (whether or not mapped) encompassing land in an area liable to flooding within the meaning of Regulation 153
of the Building Regulations 2018.
Freeboard
The minimum height of the lowest floor of the building above the defined flood level , regulated by the relevant planning
scheme, or specified or otherwise determined by the relevant council under Regulation 153 of the Building Regulations
2018 (see Figure 3 ).
Hotel offering shared accommodation: A hotel which has any sole-occupancy units that can be shared by unrelated
persons.
On-site wastewater management system
A system that receives and/or treats wastewater generated and discharges the resulting effluent to—
an approved disposal system ; or ( a)
re-use system; or (
b)
land application system. (
c)
Plumbing
Any water service plumbing, roof plumbing, sanitary plumbing system or heating, ventilation and air-conditioning plumbing.
Residential care building (Vic): A building which is a place of residence where 10% or more of persons who reside there
need physical assistance in conducting their daily activities and to evacuate the building during an emergency
(including any residential care service, State funded residential care service or supported residential service as defined
in the Supported Residential Services (Private Proprietors) Act 2010 and an aged care building ) but does not include—
a hospital; or (
a)
a dwelling in which 2 or more members of the same family and not more than 2 other persons would ordinarily (
b)
be resident; or
a place of residence where only one resident needs physical assistance in conducting their daily activities and (
c)Schedule 1 Definitions
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 330to evacuate the building during an emergency.
Restricted children’s service: A children’s service that is—
any one of the following as defined in the Children’s Services Regulations 2020— (a)
a limited hours Type 1 service; or (i)
a limited hours Type 2 service; or (ii)
a short term Type 1 service; or (iii)
a short term Type 2 service; or (iv)
an associated children’s service within the meaning of the Children’s Services Act 1996 approved to be operated (b)
by an approved provider at the same place as an approved education and care service that is required to meet
the conditions of a limited hours Type 1 service, a limited hours Type 2 service, a short term Type 1 service, or
a short term Type 2 service.
Shared accommodation building: A Class 3 building that is a boarding-house, chalet, guest house, lodging-house,
backpacker accommodation or the like, or a residential part of a hotel offering shared accommodation (but is not a
residential care building (Vic) , a motel or a residential part of school , health-care building or detention centre) having—
more than one sole-occupancy unit of which any sole-occupancy unit has sleeping facilities capable of (a)
accommodating 3 or more unrelated persons; or
sleeping facilities capable of accommodating 13 or more unrelated persons. (b)
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 331
Insert VIC Table 1 as follows:
VIC Table 1 : Schedule of referenced documents
No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS/NZS ISO 817 2016 Refrigerants -
Designation and
safety classificationN/A N/A N/A VIC E2D2
AS/NZS 1200 2015 Pressure Equipment N/A N/A N/A VIC E2D2
AS 1271 2003 Safety valves, other
valves, liquid level
gauges and other
fittings for boilers
and unfired pressure
vesselsN/A N/A N/A VIC E2D2
AS 1324.1 2001 Air filters for use in
general ventilation
and air conditioningN/A N/A N/A VIC E2D2
AS 1345 1995 Identification of the
contents of pipes,
conduits and ductsN/A N/A N/A VIC E2D2
AS 1358 2004 Bursting discs and
bursting disc devices
- Application,
selection and
installationN/A N/A N/A VIC E2D2
AS 1428.1 2009 Design for access
and mobility, Part 1:
General
requirements for
access – New
building work
(incorporating
amendments 1 and
2)VIC I4D5 N/A N/A N/A
AS/NZS 1571 2020 Copper - seamless
tubes for air conditioning and
refrigerationN/A N/A N/A VIC E2D2
AS/NZS 1530.3 1999 Methods for fire
tests on building
materials, components and
structuresN/A N/A N/A VIC B4D2
AS/NZS 1668.1 2015 The use of
ventilation and air
conditioning in
buildings: Fire and
smoke control in
buildingsN/A N/A N/A VIC E2D2Schedule 2 Referenced documents
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 332No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS 1668.2 2012 The use of
ventilation and air
conditioning in
buildings:
Mechanical
ventilation in
buildingsN/A N/A N/A VIC E2D2
AS 1851 2012 Routine service of
fire protection
systems and
equipmentN/A N/A N/A VIC B4D2
AS 1926.1 2012 Swimming pool
safety, Part 1: Safety
barriers for
swimming poolsVIC G1D2 N/A N/A N/A
AS 1926.2 2007 Swimming pool
safety, Part 2:
Location of safety
barriers for swimming pools
(incorporating
amendments 1 and
2)VIC G1D2 N/A N/A N/A
AS 2118.1 2017 Automatic fire
sprinkler systems,
Part 1: General systems (incorporating
amendment 1)VIC S17C2,
VIC S18C3N/A N/A VIC B1D5 , VIC
B4D2
AS 2118.2 2021 Automatic fire
sprinkler systems: Wall wetting
sprinkler systemsN/A N/A N/A VIC B4D2
AS 2118.3 2010 Automatic fire
sprinkler systems:
Deluge systemsN/A N/A N/A VIC B4D2
AS 2118.4 2012 Automatic fire
sprinkler systems, Part 4: Sprinkler
protection for accommodation
buildings not
exceeding four
storeys in heightVIC S17C2,
VIC S18C3N/A N/A VIC B1D5 , VIC
B4D2
AS 2118.5 2008 Automatic fire
sprinkler systemsN/A N/A N/A VIC B1D5 , VIC
B4D2
AS 2118.6 2012 Automatic fire
sprinkler systems, Part 6: Combined
sprinkler and
hydrant systems in
multistorey buildingsVIC S17C2 N/A N/A N/A
AS2118.8 1997 Automatic fire
sprinkler systems:
Minor modificationsN/A N/A N/A VIC B4D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 333No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS 2118.10 1995 Automatic fire
sprinkler systems:
Approval
documentationN/A N/A N/A VIC B4D2
AS 2473.3 2007 Valves for
compressed gas
cylindersN/A N/A N/A VIC E2D2
AS 2568 2019 Purity of medical air
produced from on-
site compressor
systemsN/A N/A N/A VIC E2D2
AS 2896 2021 Medical gas systems
- Installation and
testing of non-
flammable medical
gas pipeline systemsN/A N/A N/A VIC E2D2
AS 2902 2005 Medical gas systems
- Low pressure
flexible hose
assembliesN/A N/A N/A VIC E2D2
AS/NZS 2918 2018 Domestic solid fuel
burning appliances -
InstallationN/A N/A N/A VIC E2D2
AS 2941 2013 Fixed fire protection
installations -
Pumpset systemsN/A N/A N/A VIC B4D2
AS/NZS 3500.1 2021 Plumbing and
drainage: Water
servicesN/A N/A N/A VIC B1D3 , VIC
B1D5 , VIC
B3D3 , VIC
B4D2 , VIC
B6D2 , VIC
B7D3 , VIC
B7D4 , VIC
E2D2
AS/NZS 3500.2 2021 Plumbing and
drainage: Sanitary
plumbing and
drainageN/A N/A N/A VIC C1D3 , VIC
C2D4 , VIC
C4P1 , VIC
E2D2
AS/NZS 3500.3 2021 Plumbing and
drainage:
Stormwater drainageN/A N/A N/A VIC C5D2 , VIC
C6D2
AS/NZS 3500.4 2021 Plumbing and
drainage: Heated
water servicesN/A N/A N/A VIC E2D2 , VIC
B2D6
AS/NZS 3666.1 2011 Air handling and
water systems of
buildings - Microbial
control: Design,
installation and
commissioningN/A N/A N/A VIC E2D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 334No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS/NZS 3666.2 2011 Air handling and
water systems of
buildings - Microbial
control: Operation
and maintenanceN/A N/A N/A VIC E2D2
AS 4032.3 2022 Water supply -
Valves for the control of heated
water supply
temperaturesN/A N/A N/A VIC B2D6
AS 4041 2006 Pressure piping N/A N/A N/A VIC E2D2
AS 4118.1.1 1996 Fire sprinkler
systems:
Components -
Sprinklers and
sprayersN/A N/A N/A VIC B4D2
AS 4118.1.2 1996 Fire sprinkler
systems:
Components - Alarm
valves (wet)N/A N/A N/A VIC B4D2
AS 4118.1.3 1995 Fire sprinkler
systems:
Components - Water
motor alarmsN/A N/A N/A VIC B4D2
AS 4118.1.4 1994 Fire sprinkler
systems:
Components - Valve
monitorsN/A N/A N/A VIC B4D2
AS 4118.1.5 1996 Fire sprinkler
systems:
Components -
Deluge and pre-action valvesN/A N/A N/A VIC B4D2
AS 4118.1.6 1995 Fire sprinkler
systems:
Components - Stop
valves and non-
return valvesN/A N/A N/A VIC B4D2
AS 4118.1.7 1996 Fire sprinkler
systems:
Components - Alarm
valves (dry)N/A N/A N/A VIC B4D2
AS 4118.1.8 1999 Fire sprinkler
systems:
Components -
Pressure reducing
valvesN/A N/A N/A VIC B4D2
AS 4254.1 2021 Ductwork for air-
handling systems in
buildings: Flexible
ductN/A N/A N/A VIC E2D2
AS 4254.2 2012 Ductwork for air-
handling systems in
buildings: Rigid ductN/A N/A N/A VIC E2D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 335No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS 4426 1997 Thermal insulation of
pipework, ductwork
and equipment -
Selection,
installation and finishN/A N/A N/A VIC E2D2
AS 4508 1999 Thermal resistance
of insulation for
ductwork used in
building air-
conditioningN/A N/A N/A VIC E2D2
AS/NZS 4859.1 2018 Thermal insulation
materials for
buildings: General
criteria and technical
provisionsN/A N/A N/A VIC E2D2
AS/NZS 5141 2018 Residential heating
and cooling systems
- Minimum
applications and
requirements for
energy ef
ficiency,
performance and
comfort criteriaN/A N/A N/A VIC E2D2
AS/NZS 5149.1 2016 Refrigerating
systems and heat
pumps - Safety and environmental
requirements:
Definitions,
classification and
selection criteriaN/A N/A N/A VIC E2D2
AS/NZS 5149.2 2016 Refrigerating
systems and heat
pumps - Safety and environmental
requirements:
Design,
construction, testing, marking and
documentation N/A N/A N/A VIC E2D2
AS/NZS 5149.3 2016 Refrigerating
systems and heat
pumps - Safety and environmental
requirements:
Installation siteN/A N/A N/A VIC E2D2
AS/NZS 5149.4 2016 Refrigerating
systems and heat
pumps - Safety and environmental
requirements:
Operation, maintenance, repair
and recoveryN/A N/A N/A VIC E2D2
AS/NZS 5601.1 2022 Gas installations:
General installationsN/A N/A N/A VIC E2D2
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 336No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
ABCB Standard
for Construction
of Buildings in
Flood Hazard
Areas, Version
2012.32012 Standard for
Construction of
Buildings in Flood
Hazard AreasVIC B1D6 N/A N/A
— 2022 Motorsport Australia
Track Operators Guide For
Motorsport Race
Venues – version 1VIC I5D4 N/A N/A
FPAA101D 2018 Automatic Fire Sprinkler System
Design and
Installation—
Drinking Water
SupplyVIC S17C2,
VIC S18C3N/A N/A B1D5
FPAA101H 2018 Automatic Sprinkler
System Design—
Hydrant Water SupplyVIC S17C2, VIC S18C3 N/A N/A B4D3
Building Practice
Note FS-01— Victorian Building
Authority Practice
Note FS-01VIC S20C8 N/A N/A
SA HB 39 2015 Metal roof and wall
cladding installationN/A N/A N/A VIC E3D2
HB 276 2004 A guide to good
practice for energy
efficient installation
of residential
heating, cooling and
air conditioning plant
and equipmentN/A N/A N/A VIC E2D2
N/A 2007 Australian and New
Zealand refrigerant
handling code of
practice 2007 Part 1
- Self-contained low
charge systemsN/A N/A N/A VIC E2D2
N/A 2007 Australian and New
Zealand refrigerant
handling code of
practice 2007 Part 2
- Systems other than
Self-contained low
charge systemsN/A N/A N/A VIC E2D2
N/A 1993 The Building Act
1993 (Victoria)N/A N/A N/A B6D2
N/A 2018 Plumbing
RegulationsN/A VIC H6V1 N/A B2P7
(1 May 2023)
Victoria
NCC 2022 Volume Three - Plumbing Code of Australia Page 337In addition to this Code, there are a number of other legislative technical requirements af
fecting the design, construction,
installation, replacement, repair, alteration and maintenance of plumbing that practitioners may need to be aware of,
including, but not necessarily limited to, the following list. Additional legislative instruments such as regulations, codes,
and standards may exist under the legislation listed.
1. Relevant Legislation
Building Act 1993
Plumbing Regulations 2018
Gas Safety Act 1997VIC Footnote: Other legislation affecting buildings
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 338Schedule 11 Western Australia
Introduction
Schedule 1 Definitions
Schedule 2 Referenced documents
Footnote: Other legislation affecting buildings
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 339
Schedule 11 of the Plumbing Code of Australia (PCA) includes variations to Schedule 1 and Schedule 2 that are common
and found in all three volumes of the National Construction Code (NCC) but only relate to NCC Volumes One and Two.
There are no variations or additions in the PCA for Western Australia. However, Western Australian variations to provisions
in the PCA and applicable referenced documents can be found in the Plumbers Licensing and Plumbing Standards
Regulations 2000. WA Introduction
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 340
Design wind speed
The design gust wind speed for the area where the building is located, calculated in accordance with AS/NZS 1170.2 or
AS 4055 (see WA Table 4 for wind classes).
Insert WA Table 4 as follows:
WA Table 4 : Wind classes
Table Notes
Wind classification map identifying wind regions is contained in ABCB Housing Provisions Part 2.2 (see Figure (1)
2.2.3 ).
Information on wind classes for particular areas may be available from the appropriate authority. (2)
“N” = non-cyclonic winds and “C” = cyclonic winds. (3)
Licensed premises: Includes—
premises in respect of which a cabaret licence as defined by the Liquor Control Act 1988 has been granted (a)
under that Act; or
premises in respect of which a tavern licence, a hotel restricted licence or any other kind of hotel licence as (b)
defined by the Liquor Control Act 1988 has been granted under that Act; or
a cabaret, hotel or tavern— (c)
in respect of which a special facility licence as defined by the Liquor Control Act 1988 has been granted (i)
under that Act; and
in respect of which paragraph (a) or (b) does not apply. (ii)
Potable water: Water intended for human consumption supplied by a water services provider.
Public building: A Class 6 licensed premises or 9b building where persons may assemble for—
civic, theatrical, social, political or religious purposes; or (a)
educational purposes; or (b)
entertainment, recreational or sporting purposes; or (c)
business purposes. (d)
WELS: Has the meaning given in the Water Efficiency Labelling and Standards Act 2005 of the Commonwealth.Schedule 1 Definitions
Non-cyclonic Region A Cyclonic Region B, C and D
N1, N2, N3 C1
N4, N5, N6 (these wind classes are covered in the ABCB
Housing Provisions Part 2.2 )C2, C3, C4 (these wind classes are covered in the ABCB
Housing Provisions Part 2.2 )
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 341Insert WA Table 1 as follows:
WA Table 1 : Schedule of referenced documents
T
able Notes
For AS/NZS 1170 Part 2, incorporate the changes as set out in WA Part B2 of Volume One and WA Part 2.3 of the ( 1)
ABCB Housing Provisions.
For
AS 4055, incorporate the changes set out in WA Part 2.3 of the ABCB Housing Provisions. (2)Schedule 2 Referenced documents
No. Date Title Volume One Volume Two Housing
ProvisionsVolume Three
AS/NZS
1170.22021 Structural
design actions
– Wind actions
(See Note 1)WA B1D3, WA
B1D4, Spec 4, WA B2D1, WA
B2D2, WA
B2D3, F3V1, Schedule 1H1D7, H2V1,
Schedule 1WA 2.2.3 , WA
2.3.1 , WA
2.3.2 , WA
2.3.3 , WA
2.3.4 ,
Schedule 1Schedule 1
AS/NZS
3500.42021 Plumbing and
drainage –
Heated water
services, Amdt 1N/A WA H9D4 N/A N/A
AS 4055 2021 Wind loads for
housing (See
Note 2)Schedule 1 H1D6, H1D8,
Schedule 1WA 2.2.3 , WA
2.3.1 , WA
2.3.5 ,
Schedule 1Schedule 1
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 342In addition to any applicable provisions of the Plumbers Licensing
Act 1995, Plumbers Licensing and Plumbing Standards
Regulations 2000 and this code, there are a number of other legislative technical requirements affecting the design,
construction, installation, replacement, repair, alteration and maintenance of a plumbing system that practitioners may
need to be aware of, including, but not limited to, the following list. Additional legislative instruments such as regulation,
codes and standards may exist under the legislation listed.
1. Planning
Administering Agency
Western Australian Planning Commission
Relevant Legislation
Planning and Development Act 2005
2. Building
Administering Agency
Department of Mines, Industry Regulation and Safety
Relevant Legislation
Building Act 2011
3. Health
Administering Agency
Department of Health
Relevant Legislation
Health Act 1911
4. Child Care
Administering Agency
Department of Communities
Relevant Legislation
Child Care Services Act 2007
5. Gas Installations
Administering Agency
Department of Mines, Industry Regulation and Safety
Relevant Legislation
Gas Standards Act 1972 WA Footnote: Other legislation affecting buildings
(1 May 2023)
Western Australia
NCC 2022 Volume Three - Plumbing Code of Australia Page 3436. Environment
Administering Agency
Environment Protection Authority
Relevant Legislation
Environment Protection Act 1986
7 . Electrical Installations
Administering Agency
Department of Mines, Industry Regulation and Safety
Relevant Legislation
Electricity Act 1945
8. Water Resource
Administering Agency
Department of Water
Relevant Legislation
Water Services Act 2012
(1 May 2023)
abcb.gov.au© Australian Building Codes Board 2022
The National Construction Code can be accessedfree online at ncc.abcb.gov.au by registration