AS/NZS 2845.2:2025
Water supply – Backflow preventions devices, Part 2: Registered air gaps and registered break tanks
Standard objective is to specify design and marking requirements for registered break tanks and air gaps used as backflow prevention devices for the protection of water distribution systems.
This document is designed to provide protection of water distribution systems from contamination. It should be read in conjunction with AS/NZS 2845.1, Water supply – Backflow prevention devices, Part 1: Materials, design and performance requirements and AS/NZS 3500.1, Plumbing and drainage, Part 1: Water services.
This document has been revised to meet requirements in AS/NZS 3500.1, Plumbing and Drainage, Part 1: Water services. Air gaps and break tanks should be recorded on a register of backflow protection devices by the local authority.
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AS/NZS 2845.2:2025
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