AS/NZS 3500.2:2021 Plumbing and drainage, Part 2: Sanitary plumbing and drainage
Standards Australia/Standards New Zealand
Supersedes: AS/NZS 3500.2:2018 Plumbing and drainage, Part 2: Sanitary plumbing and drainage
Draft Designation: DR AS/NZS 3500.2:2021This Standard incorporates Amendment No. 1 (October 2021). The start and end of changes introduced by the Amendment as indicated in the text by tags including the amendment number 1.
The objective of this document is to provide installers with deemed to satisfy solutions for compliance with —
(a) the National Construction Code (NCC) Volume Three, Plumbing Code of Australia (PCA); and
(b) the New Zealand Building Code (NZBC), Clause G13 Foul Water.
A list of all parts in the AS/NZS 3500 series for plumbing and drainage can be found in the Standards Australia and Standards New Zealand online catalogues.
The major changes in this revision are as follows:
(i) Conformance to individual product standards has been removed. All products used in plumbing and drainage systems in Australia need to comply with the PCA and, in New Zealand, the NZBC, see Appendix A for further information. Removal of specific product standard conformance requirements avoids inconsistencies and contradictions between this document and the PCA and NZBC.
(ii) Definitions have been relocated to AS/NZS 3500.0 for consistency across the series.(iii) The range of materials that can be used for wet wells has been expanded to encompass prefabricated wells.
(iv) Changes to the requirements for the marking of pipes in commercial buildings to assist in the better identification of pipework and avoid cross connections.
(v) Changes to the connection requirements for drains at grade.
(vi) The requirement for a commercial dishwashing machine drainage just to connect to a disconnector gully with a 10 m discharge pipe has been removed. This allows the more effective arrangement of commercial kitchens.
(vii) An appendix has been added providing guidance on the requirements of AS 2870 for flexible connections to be installed in plastics pipe drainage systems. It covers flexible connections, lagging and water ingress under the slab to accommodate a range of differential soil movement for Soil Classes M, M-D, H1, H1-D, H2, H2-D, E and E-D.
(viii) Changes to the number of pressure attenuators required to allow more flexible installation options.
The terms “normative” and “informative” are used in Standards to define the application of the appendices to which they apply. A “normative” appendix is an integral part of a Standard, whereas an “informative” appendix is only for information and guidance.
Notes or footnotes to tables or figures that are expressed in mandatory terms are deemed to be requirements of this document.
Notes to clauses in this document are informative only and do not include requirements.
First published as AS 3500.2-1990. Jointly revised and redesignated as AS/NZS 3500.2.2:1996. Jointly revised and redesignated as AS/NZS 3500.2:2003.
This document specifies requirements for the design and installation of sanitary plumbing and drainage from fixtures to a sewer, common effluent system or an on-site wastewater management system, as appropriate. It applies to new installations as well as alterations, additions or repairs to existing installations.
Illustrations used in this document are diagrammatic only and have been chosen without prejudice.
NOTE 1: The pre-treatment of trade wastes is not specified in this document.
NOTE 2: All sanitary plumbing and sanitary drainage installations for relocatable dwellings on long-term sites should conform to this document.
Contents:
Section 1: Scope and general
Section 2: Materials and products
Section 3: Drainage design
Section 4: Drainage system
Section 5: Excavation bedding support and backfilling
Section 6: General design requirements for sanitary plumbing systems
Section 7: Greywater plumbing and drainage systems
Section 8: Fully vented systems and fully vented modified systems — Design and installation
Section 9: Single stack systems and single stack modified systems — Design and installation
Section 10: General installation of pipework
Section 11: Reduced velocity aerator stack system
Section 12: Pumped discharge
Section 13: Fixtures and appliances
Section 14: Multi-unit developments
Section 15: Testing of sanitary plumbing and sanitary drainage installations
Section 16: Vacuum drainage design and installation
Appendix A: (informative) Demonstrating products and materials are fit for purpose
Appendix B: (normative) Maximum length of fixture discharge pipe without venting
Appendix C: (informative) Pipe grades conversion
Appendix D: (informative) Conduct of inspections using closed circuit television
Appendix E: (normative) Sizing vacuum drainage pipes and buffers
Appendix F: (normative) Renovation of sanitary plumbing and drainage systems using structural plastics liners
Appendix G: (informative) Drains in unstable soils
Plumbing and Drainage.
WS-014
Association of Hydraulic Services Consultants Australia; Australian Building Codes Board; Australian Industry Group; Australian Stainless Steel Development Association; Backflow Prevention Association of Australia; Engineers Australia; Hydraulic Consultants Association Australasia; International Copper Association Australia; Master Plumbers Australia and New Zealand; Master Plumbers, Gasfitters and Drainlayers New Zealand; Ministry of Business, Innovation and Employment (NZ); Plastics Industry Pipe Association of Australia; Plastics New Zealand; Plumbers, Gasfitters and Drainlayers Board (NZ); Plumbing Distributors Association of New Zealand; Plumbing Products Industry Group; The Institute of Plumbing Australia; Water New Zealand; Water Services Association of Australia.
