What is Backflow?

Backflow is a hazardous situation that can threaten the safety of the public water supply. The danger arises when there is a connection to the water source where water can be drawn back into the pipes. For example, if the water pressure suddenly drops, any water that has puddled near the sprinkler heads, where fertilizers are often present, could be sucked back into the water supply that the public relies on for drinking. The same thing could happen if a hose is left dangling in a swimming pool or fish tank.

A decrease in water pressure is not uncommon. If a hydrant is being used nearby to extinguish a fire or a nearby water main has ruptured, it will cause the pressure to drop suddenly.

Backflow prevention devices must be used to stop such contaminants from potentially enter the public water system.

New York State law mandates the installation of backflow devices on all appliances attached to the public water system like underground irrigation systems, swimming pools, dark rooms and solar heating systems. The devices must be tested annually by a certified tester and the results filed with the Hicksville Water District.

Nassau County now requires public water suppliers to collect fees for the installation of new underground irrigation systems (which must include backflow devices) in the amount of $75 for residential and $150- $300 for commercial sites.