Backflow Testing Brisbane

AK Gas & Plumbing specialist in backflow testing in Brisbane including repairs, installation and prevention while providing the best rates and customer service! Give our friendly team a call today to discuss.


Backflow prevention is an incredibly important aspect of your plumbing and drainage system. As part of your owner responsibilities, the local council requires you to have your backflow system checked every twelve months. A qualified plumber who carries backflow endorsement must undertake these checks, and all of our staff are certified.


According to the Brisbane City Council regulations, you are required to undertake backflow testing if you have any of the following:

  • an irrigation system
  • fire hose reels or hydrants
  • a commercial or industrial activity or machinery connected to the mains
  • water outlets in proximity to pollutants, grease traps or chemicals
  • an underground rainwater tank that has mains water

We check, test, repair and service any of the following:

Air Gap

Break Tank

Reduced Pressure Zone Device (RPZD)

Double Check Valve (DCV)

Single Check Valve (SCV)

Pressure Type Vacuum Breaker (PTVB)

To arrange an inspection or service on your backflow devices, contact AK Gas and Plumbing today for non- obligatory, upfront quote on (07) 3419 6579, or submit an online enquiry here.

What are backflow prevention devices?

Backflow prevention devices are used to safeguard the mains water supply against hazardous contaminants. There are several types of backflow protection devices, including Dual Pressure Relief Valves, Vacuum Breakers, and Reduced Pressure Zone Devices.

What do the devices do?

Backflow may occur when the pressure in the main water supply is lower than that of the pipework on your property. This could create an air gap in the water main which can result in back siphonage. If your water source is in some way connected to the source of contamination it could be taken into the mains water. These contaminants could come from things such as crossing connections, hoses soaking in water, irrigation systems and so on. If this occurs the backflow devices stop the water from flowing back to the drinking water supply.

How often do these devices need testing?

Backflow prevention devices have to be tested each year to ensure they’re operating properly. Testing every 12 months will be done by the councils as well as the state legislature in Queensland to guard against contaminated sources entering water sources. The device must be inspected by a certified plumbing contractor with Backflow Prevention endorsements. A test report is sent directly to the council to verify that the device has passed a test and have been certified.