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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

Specifies requirements for the design, installation and commissioning of cold water services from a point of connection to the points of discharge, and for non-drinking water from a point of connection to the points of discharge.