A backflow prevention device stops polluted or contaminated water entering the drinking water supply through cross-connections or back-siphonage.

Backflow prevention devices must be installed by a licensed plumber and registered with Council after the initial test.

Annual inspection and testing

If your property has a backflow prevention device, you must have it inspected and tested annually by a backflow-endorsed licensed plumber.  Penalties apply to property owners who fail to have their devices tested annually.

The plumber must lodge the test results (Form 9)  with Council within 10 days of the inspection.

Council’s preferred lodgement method is via email to pladmin@cairns.qld.gov.au.

The Form 9 can also be lodged via mail or over the counter at Customer Service, 119 – 145 Spence St, Cairns.

Last Updated: 24 November 2022

Latest News > All News

New Director Planning Growth and Sustainability

Cairns Regional Council has appointed Doug Scott as its new Director Planning, Growth and Sustainability, bringing more than 15 years...

General Updates
28 October 2026

Opportunities for Cairns to support new initiatives

Delivering value for residents and ratepayers, improving community safety, unlocking housing with long-term investment, and ensuring Cairns’ growth are at...

Business & Economy
28 October 2026

King tides expected in Cairns this week

King tides are expected to affect Cairns from Monday 26 – Wednesday 28 October.These king tides are all expected to...

Disaster Preparedness & Recovery
26 October 2026