Plumbing and drainage, Part 2: Sanitary plumbing and drainage

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's included

AS/NZS 3500.2:2021 contains sixteen sections:

• 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 four normative and two informative appendices:

• 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.

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.