Testing, installation, repairs and reporting across Brisbane.
Backflow-Endorsed Plumbers
Annual Device Testing
RPZ, Double Check and Testable Devices
Brisbane City Council Test Reporting
Backflow prevention protects drinking water by stopping water from reversing into the potable supply. We inspect and test registered devices, diagnose failed tests, carry out suitable maintenance and help with new or replacement backflow devices.
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Backflow is the unwanted reverse movement of water through a plumbing system. It can happen when supply pressure drops and water is drawn backwards, or when pressure on the property side becomes greater than the supply pressure.
If a drinking-water line is connected to irrigation, machinery, a tank, fire services or another potential source of contamination, reverse flow can carry polluted water into the property supply or water main. A correctly selected backflow prevention device creates a barrier against that risk.
Backflow requirements depend on the potential contamination hazard and how the water service is connected. Examples identified by Brisbane City Council include:
Irrigation connected to the mains water supply
Fire hose reels
Commercial or industrial machinery connected to mains water
Water outlets near pollutants, chemicals or grease traps
Underground rainwater tanks with mains water backup
Backflow protection is selected according to the risk posed if reverse flow occurs. Brisbane City Council advises that medium- and high-hazard situations require a testable backflow prevention device. Device selection must be based on the actual installation rather than the device name alone.
| Device or protection type | What it does |
|---|---|
| Reduced pressure zone device (RPZ) | A testable assembly providing high-level protection for appropriate hazard conditions. It includes a relief zone that can discharge water during operation or a fault. |
| Double check valve assembly | A testable assembly using two check valves. Its suitability depends on the assessed hazard and installation requirements. |
| Pressure-type vacuum breaker | A testable device used for appropriate backsiphonage risks and installed subject to height, location and system requirements. |
| Registered air gap or break tank | Physical separation methods used in suitable applications to prevent contaminated water reaching the drinking-water supply. |
| Non-testable device | Used for lower-risk applications where permitted. It does not follow the same annual registered testing program as a testable device. |
Brisbane City Council maintains a register of testable backflow prevention devices. Owners of registered testable devices must arrange inspection or testing each year by an endorsed backflow tester and pay the applicable annual Council registration fee.
The endorsed tester records the device and test results on the approved Form 9 and submits the required information to Council. Council states that the tester must submit the results within 10 business days after the inspection or test.
For current owner obligations, notices and registration information, see Brisbane City Council’s backflow prevention guidance.
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We identify the registered device, inspect its condition, complete the prescribed test procedure and record the result.
If a device fails, we explain the fault and available maintenance, repair or replacement options before additional work proceeds.
We install suitable backflow protection and replace devices that are damaged, obsolete or uneconomical to repair, subject to site requirements.
Our backflow-endorsed plumbers test reduced pressure zone devices and assess valve operation, differential pressures and relief performance.
We complete the applicable test documentation and submit required backflow test results to Brisbane City Council.
We inspect the connection, potential hazards, device accessibility and installation condition before recommending the next step.
Brisbane City Council requires registered testable backflow prevention devices to be inspected or tested each year by an endorsed backflow tester.
Testing, commissioning and maintaining backflow prevention devices requires a plumber with the appropriate backflow prevention endorsement. The QBCC defines this specialist scope separately from a standard plumbing licence.
The tester explains the defect and whether cleaning, maintenance, component replacement or a new device is appropriate. The device must provide the required protection before a satisfactory result can be recorded.
An RPZ, or reduced pressure zone device, is a testable backflow prevention assembly used for appropriate higher-risk applications. It contains check valves and a relief zone designed to protect the upstream water supply.
Discharge may occur because of pressure conditions, debris, worn internal components or another fault. Because discharge is part of how the relief zone protects the supply, the cause should be assessed rather than the outlet being blocked.
No. Annual Council testing applies to registered testable devices. Many ordinary residential arrangements use non-testable protection. A plumber can identify the installed device and advise whether it is on the testable-device register.
Brisbane City Council says it issues annual registration fee notices and testing reminders to owners of registered testable devices. The owner remains responsible for arranging testing and keeping contact details current.
Cost depends on the device type, size, location, access, condition and whether maintenance or repairs are required. We provide the service price before testing proceeds.
Yes. We arrange backflow testing and related plumbing work across Brisbane City and surrounding suburbs, subject to device details and appointment availability.
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49 Montpelier Rd
Bowen Hills, QLD 4006
14/475 Scottsdale Drive
Varsity Lakes QLD 4227
Suite 10&11, 81 Brisbane St
Ipswich, QLD 4305
Phone: 1300 453 873
Email: customerservice@jetsetplumbing.com.au
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