Backflow Prevention

A ‘testable backflow prevention device’ is installed in the water supply pipes of a property to prevent contaminants being introduced into the drinking water.


Properties that have water installations that are considered to be high hazard installations require a testable backflow prevention device to be installed. A Certificate of Likely Compliance and Plumbing Permit must be issued by Council before they are installed.


Owners of these devices are responsible for having each one tested by a plumber who is licensed to test the devices at least every 12 months.


When they pass the test the plumber will fill out a test report form (Testable Backflow Prevention Device Test Certificate). A copy of this must be sent to Council verifying that the test has been done and that the device is working as designed.  


View the Testable Backflow Prevention Device Test Certificate (PDF)


The Council is required to keep a register of testable backflow prevention devices that are located within a property, and an annual reminder and an invoice is sent to owners in order to maintain this register.