Backflow Testing Perth Our Backflow services include the annual backflow testing of Backflow prevention devices. 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).  In situations when there is a burst or ruptured water main, … Continue reading Backflow Testing