Backflow / Thermostatic Mix Testing

Backflow is a reversal of the normal direction of water flow in your water supply plumbing system. It presents a hazard where your water supply is inadvertently interconnected with a source of pollution. Those pollutants could then enter your water supply.

Backflow can only occur when the water delivery main is at a lower pressure than your plumbing system. For example, when there is a burst or ruptured main; or excessive demand during fire fighting operations and the like. Backflow can also occur if a pump is connected to your water plumbing system.

Each backflow prevention containment device must be tested on an annual basis. This is a condition of connection to the water supply. It means that the device is maintained and continues to operate effectively. The annual test will ensure the drinking water supply is protected from backflow.

If a device is defective or faulty, it may:

• not prevent a contaminated source entering the drinking the water supply
• cause water to be wasted through leaking devices
• impact on the water pressure supplying your property

A backflow prevention accredited licensed plumber will need to test all of your devices.