Backflow prevention

Backflow prevention containment policy

Backflow prevention containment devices are essential for the protection of a water supply network. This policy (pdf, 290kb), revised 1 October 2017, sets out the requirements and appropriate levels of protection required for different plumbing scenarios. All water service connections (general/fire/recycled water services) shall be fitted with an appropriate containment backflow prevention device to provide a level of backflow protection in accordance with this policy. We encourage all those involved with plumbing and backflow installation to make themselves familiar with this policy.

Backflow prevention device testing

All testable backflow prevention devices, registered air gaps and break tanks that are rated for high or medium hazard installations, and all testable fire service single check valves, shall be tested upon installation (commissioned) and then at intervals not exceeding 12 months. This test must be carried out by a licensed plumber endorsed for backflow prevention testing.

If your plumber can not carry out the test a list of testers is available for your reference. For further details on backflow prevention see our Backflow information sheet (pdf, 139Kb).

Backflow inspection forms

If you're a suitably qualified plumber with backflow accreditation, we encourage you to use and return these forms for each of your backflow projects. The aim of the form is to provide a checklist and consistent approach to backflow maintenance.

Inspection and maintenance report of backflow prevention device (pdf, 91Kb) (updated 01 October 2017)

Backflow test report for break tank and air gap (pdf, 107Kb) (updated 01 October 2017)

Please note incomplete forms will not be accepted and the device will remain out of test. Refer to the Backflow prevention containment policy (pdf, 290Kb) (updated 01 October 2017) for more information.

Further assistance

If you have any questions about our Backflow prevention policy and testing requirements, simply email backflow@sew.com.au or call 03 9552 3280 or 9552 3077.