Backflow prevention devices are a vital safety element in ensuring our potable water remains clean and uncontaminated.
Water Corporation stipulates annual testing of all testable backflow prevention devices. As out team are trained and certified to perform the necessary testing, Spades Plumbing Perth can provide all of your backflow prevention device; installation, testing, servicing, compliance and replacement needs.
What is Backflow?
Backflow is a reversal of the normal direction of water flow in a water supply plumbing system. It occurs when the water delivery main is at a lower pressure than the internal plumbing system (back siphonage). Back siphonage can occur when there is a burst or ruptured water main, or due to excessive demand during fire-fighting operations or other periods of high demand.
Backflow can also occur if a water pump, such as a bore pump, is cross connected to the internal water plumbing system, and is pumping bore water at a higher pressure than the water mains pressure (back pressure).
If a property’s drinking water supply is inadvertently connected with a source of pollution, either through a cross connection or simply a hose submerged in a container of liquid, then these pollutants could enter the water supply when there is an overpressure on the private property side or a sudden drop in water mains pressure.