If you manage a school, a gym, an aged care facility or any commercial property, you have probably seen “backflow testing” sitting on a maintenance schedule or a compliance reminder. It tends to live in that pile of tasks that feel important but rarely get explained properly. Here is what backflow actually is, why it matters, and who is responsible for keeping it in check.

 

What is backflow?

Water in your pipes is meant to flow one way, from the mains supply into your building. Backflow is when that flow reverses and has the potential to pull contaminated water back into the clean drinking water supply. It can happen during a sudden drop in mains pressure, a nearby burst pipe, or when a pump or appliance creates suction in the wrong direction. The risk is not the reversal itself, it is what the water carries with it.

Chemicals from an irrigation system, water sitting in a fire service line, chemicals from a pool backwash and dosing facility, dirty water from a commercial sink or wash bay, even a shower hose that has made its way into a nearby toilet bowl. All of it can travel backwards into our precious drinking water if nothing is in place to stop it.

 

Why it matters

A backflow event can contaminate the water supply for a whole building, and in some cases beyond the property boundary. For a home, that is a serious health problem. For a school, a childcare centre, a medical practice or an aged care facility, it is a genuine health risk affecting people who are often more vulnerable than most.

That is why certain properties are required (by law and water authority) to have a backflow prevention device fitted, and why those devices need testing regularly. A device is a mechanical part. Springs weaken, seals wear and valves stick. One that worked perfectly last year can fail quietly, with no warning, until it is tested.

 

Who is responsible?

This is where a lot of property owners and managers get caught out. Responsibility for installing, maintaining and testing a backflow prevention device always sits with the property owner or occupier, not the water authority.

In practical terms, that means:

• The owner or manager is responsible for having the right device installed.
• Testable devices need to be tested once a year by a licensed backflow tester.
• Records of that testing need to be kept onsite and supplied to the relevant water authority at the time of testing.

 

If a device fails and contaminated water enters the supply, the responsibility lands back on the property. The annual test is not red tape for its own sake. It is the thing that proves the device is doing its job.

 

Keeping on top of it

Backflow testing is one of those jobs that is simple when it is handled properly and stressful when it is forgotten. The device gets tested, any faults get repaired, the paperwork gets lodged, and you move on for another year. The trouble usually starts when no one is tracking when the test is due.

Evans Plumbing carries out backflow testing and servicing for schools, councils, aged care providers, gyms, commercial facilities and domestic homes across Melbourne’s northern and inner suburbs.

With more than 45 years of plumbing experience, we handle the testing, any repairs needed and the documentation, so compliance stays off your worry list rather than on it.