What Happens During a Backflow Test?
During a backflow test, a qualified plumber checks whether the prevention device is operating correctly, records the results and identifies any faults that could affect water safety or compliance. For testable devices in Victoria, this forms part of the annual maintenance and testing requirement.
A backflow prevention device helps stop contaminated water from reversing into the drinking water supply.
The test itself is usually straightforward, but it needs to be carried out correctly by someone qualified to perform backflow prevention work.
What Does a Backflow Test Check?
A backflow test is designed to confirm that the device is still doing its job.
Depending on the device, the plumber may check:
Valve operation
Pressure levels
Internal seals
Check valves
Relief valves
Signs of wear or damage
Whether the device passes the required test criteria
The plumber records the results and can identify whether the device passes, needs servicing or requires repair.
Future Flow Plumbing provides backflow testing across Melbourne’s Western Suburbs, including testing, servicing and compliance reporting.
How Long Does Backflow Testing Take?
The exact time depends on the device, access and whether any faults are found.
For a straightforward test, the inspection itself is generally relatively quick. More time may be required if the device needs cleaning, adjustment, repair or retesting.
Future Flow Plumbing advises allowing around 30 to 60 minutes per assembly for its backflow testing process.
Does the Water Need to Be Turned Off?
In many cases, the water supply may need to be temporarily isolated while the device is being tested.
This allows the plumber to safely test the internal components and pressure conditions.
For commercial properties, it is worth planning the test around site operations if a brief interruption to the water supply could affect staff, customers or equipment.
What Happens If the Device Passes?
If the device passes, the plumber records the test result and completes the required documentation.
For testable backflow devices, Victorian water authorities generally require annual testing and submission of the results to the relevant authority.
Future Flow Plumbing’s backflow testing service includes handling the compliance reporting process, reducing the paperwork for the property owner.
What Happens If the Backflow Device Fails?
A failed test means the device is not operating as required and needs attention.
The plumber may need to:
Service the device
Clean internal components
Replace damaged parts
Repair the assembly
Replace the device where necessary
Retest it after repairs
Victorian guidance requires testable devices to be maintained and repaired when faults are identified.
Ignoring a failed device can leave the property non-compliant and reduce the protection provided to the drinking water supply.
Who Is Allowed to Carry Out the Test?
Backflow prevention testing is specialised plumbing work.
In Victoria, testing and annual retesting of testable backflow devices must be carried out by a plumber appropriately licensed in backflow prevention work, or under the required supervision.
That is why it is important to use someone who is qualified specifically for this type of testing rather than simply arranging a general plumbing inspection.
How Often Should the Device Be Tested?
Testable backflow prevention devices generally need to be tested every 12 months.
The property owner is responsible for ensuring the test is arranged and that the results are submitted to the relevant water authority.
If you are unsure whether your device is due, check the date of the previous test or arrange an assessment.
Need Your Backflow Device Tested?
Future Flow Plumbing provides backflow testing in Melbourne’s Western Suburbs, including Point Cook, Werribee, Hoppers Crossing, Altona, Williamstown, Footscray, Sunshine, Tarneit and surrounding areas.
If your annual test is approaching or you are unsure whether your property is compliant, arranging the test early can help avoid unnecessary compliance issues.
You can also view the full range of plumbing services across Melbourne’s west.
FAQs
What does a plumber do during a backflow test?
The plumber tests the device’s valves, pressure and internal operation to confirm that it is preventing reverse water flow correctly.
How often does backflow testing need to be done?
Testable backflow prevention devices generally require testing every 12 months in Victoria.
What happens if my backflow device fails?
The device may need servicing, repair or replacement before being retested.
Do backflow test results need to be submitted?
Yes. Test results for registered testable devices generally need to be provided to the relevant water authority.