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Sets out minimum requirements for the materials, design and installation of waterproofing for domestic wet areas in Class 1, Class 2 and Class 4 buildings as defined in the NCC. It also applies to wet areas within Class 3 to 9 buildings as if it were a Class 2 or 4 part of a building.

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. It applies to new installations as well as alterations, additions or repairs to existing installations. It does not apply to the pre-treatment of trade wastes.

AS/NZS 3500.4:2025 specifies the requirements for the design, installation and commissioning of heated water services using drinking water or rainwater or a combination thereof. It includes aspects of the installation from the valves on the cold-water inlet to any cold-water storage tank or water heater and the downstream fixtures and fittings. It applies to new installations as well as alterations, additions and repairs to existing installations