Backflow Resources

Industry Documents

Boundary Backflow Prevention for Drinking Water Supplies Code of Practice

This Code of Practice provides best practice guidance on how water suppliers can minimise the risk of backflow through the development of policies and practices covering the selection, installation and monitoring of backflow devices for all connections supplied with drinking water, including residential properties. The Code is available at this link.

New Zealand Industry Standard And Templates For Field Testing Of Backflow Prevention Devices And Verification Of Air Gaps

This document covers the testing of backflow prevention devices and verification of air gaps. It was developed to replace AS 2845 Water supply – backflow prevention devices, Part 2 Registered air gaps and registered break tanks and Part 3 Field testing and maintenance of testable devices. It is more suitable for use in New Zealand as it reflects the regulatory environment and the procedures currently in use. The Standard is available at this link.


American Backflow Prevention Association

The Backflow Prevention TechZone

Master Plumbers Association

Backflow Prevention Courses - Unitec

The Chartered Institution of Water and Environmental Management (CIWEM)

Plumbing, Gasfitting, Drainlaying and Roofing ITO

Compliance Document for New Zealand Building Code Clause G12 Water Supplies - Third Edition