Backflow in a water supply plumbing system is when the normal direction of water flow is reversed. This happens when water delivery main is at a lower pressure than the internal plumbing system. Backflow can occur when a water main is burst, or during a period of high demand or excessive use such as fire-fighting operations.
Backflow also occurs if a water pump such as a bore pump is interconnected to the internal water plumbing, and is pumping bore water at a higher pressure than the water main. If the drinking water supply on a properly is inadvertently connected to a polluted source, either through cross-connection or a submerged hose in a container of liquid, then these pollutants could enter the water supply when there is overpressure on the private property or a sudden drop in water mains pressure.
Backflow can be prevented with a backflow prevention device. The community has the right to be protected from contaminated water as a result of a backflow incident. Contaminated water can cause health problems or even result in death. Due to this, legislation has been created to install a backflow prevention device:
Water Services Act 2012
Water Services Regulations 2013
Only licensed plumbing contractors who are certified may install backflow prevention devices such as the team at Plumbers & Gasfitters Bunbury. If you require hot water repairs, contact us immediately and we will be at your door within the hour. For more information on our hot water systems or service, don’t hesitate to get in touch with us.