Backflow Protection

Backflow is the reverse flow of potentially contaminated liquid into the potable water supply.

The installation of a backflow prevention device protects the water supply from this very serious situation.

Backflow can occur when:

the water delivery main (reticulation system) is at a lower pressure than a property’s plumbing system. This can occur when there is a burst in the supply main or excessive demand during fire fighting.
a pump is connected to a property’s internal water plumbing system and is therefore using water at a pressure higher than the pressure in a water utility’s supply main.
a pump is connected to a non-potable supply. Many rainwater tank installations are fitted with a pressure pump on the delivery side of the tank.
high water usage downstream causes a pressure reduction upstream.
the water outlet on a property is significantly higher than the water utility’s main with a constant back pressure.
a bore water supply is connected to a property’s water supply system.