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National Plumbing can do backflow testing and repairs plus lodge registrations.
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].
Reduced pressure zone assemblies [RPZ Valves] are extremely important. They’re used to keep contamination or pollution out of your water.
This device is installed onto your plumbing system to protect drinking water and your water supply.
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