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Plumbing and drainage part 2 - Sanitary plumbing and drainage

Requirements for the design and installation of sanitary plumbing and drainage, common effluent system or an on-site wastewater management system.

Overview of the Standard 

This Australian Standard specifies requirements for the design and installation of sanitary plumbing and drainage from the 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 and repairs to existing installations.

This Standard is to be read in conjunction with the Plumbing Code of Australia (PCA).

What does it include?

AS 3500.2 is broken into 16 sections consisting of: 

  • Section 1 states what the standard covers, and describes the terms and abbreviations used in this Standard
  • Section 2 specifies requirements for materials and products to be used in sanitary plumbing, vacuum drainage and drainage systems
  • Section 3 specifies requirements for the design of sanitary drainage systems
  • Section 4 specifies requirements for components of sanitary drainage systems
  • Section 5 specifies requirements for excavation, bedding, support and backfilling of drains
  • Section 6 specifies requirements for all types of sanitary plumbing systems
  • Section 7 specifies requirements for the installation of greywater sanitary plumbing and drainage from the respective plumbing fixtures to greywater treatment or diversion devices and overflow therefrom were directed to the drainage system
  • Section 8 specifies design requirements and methods of installation for fully vented systems and fully vented modified systems of sanitary plumbing
  • Section 9 specifies design and installation requirements for single stack systems and the single stack modified systems of sanitary plumbing
  • Section 10 specifies requirements for the fixing, protection, spacing, and concealment of sanitary plumbing pipes and fittings
  • Section 11 specifies design and installation requirements for the reduced velocity aerator stack system for sanitary plumbing
  • Section 12 specifies requirements for pumped discharge
  • Section 13 specifies requirements for the installation of sanitary fixtures and appliances, and their connection to the sanitary plumbing or sanitary drainage system
  • Section 14 specifies minimum requirements for the main lines of a sanitary drain located in a multi-unit development of three or more residential buildings
  • Section 15 specifies requirements for the inspection and testing of sanitary plumbing and sanitary drainage installations
  • Section 16 specifies the design and installation requirements and the components of a vacuum drainage system within a property for the removal of wastewater from the collection points to the discharge point connecting to the sanitary drainage system

This standard also contains 4 normative and 2 informative appendices consisting of:

  • Appendix A comprises a list of pipes and fittings are acceptable solutions
  • Appendix B comprises information on the maximum length ‘m’ of fixture discharge pipe without venting
  • Appendix C contains a pipe grades conversion table
  • Appendix D contains information on the process of conducting inspections by the use of CCTV
  • Appendix E contains information on sizing vacuum drainage pipes and buffers
  • Appendix F contains information regarding the renovation of sanitary plumbing and drainage systems using structural plastics liners

Is the Standard referenced in NCC or other legislation?

This Standard is referenced in Part C1 Sanitary plumbing systems and Part C2 Sanitary drainage system of the NCC Volume Three. It applies to the sanitary, plumbing and drainage requirements in all classes of building. 

Who is the Standard for?

The primary users of this standard are residential and commercial builders, designers, plumbers, related building trade contractors, building certifiers and surveyors, project managers, manufacturers and testing authorities.

Related Australian Standards

  • AS/NZS 3500.1 Plumbing and drainage - Water Services
  • AS/NZS 3500.3 Plumbing and drainage - Stormwater drainage
  • AS/NZS 3500.4 Plumbing and drainage - Heated water services

Related HIA information sheets

Getting a copy of the Standard

An electronic copy of this Australian Standard can be purchased through the Digital Australian Standards webpage.

To find out more, contact HIA’s Building Services team.

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