Water Check Valve Backflow Preventer

Another common location for a backflow preventer is the connection of a fire sprinkler system to a water main to prevent pressurized water from flowing from the fire suppression system into the public water supply.

Water check valve backflow preventer.

This double check valve assembly is designed to this double check valve assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to back siphon age and or backpressure. It s compact modular design means easy maintenance with a single access cover for in line repairs. If either check valve should leak the relief valve is designed to open and discharge water to the outside ensuring that backflow never occurs. Backflow preventers prevent contamination of potable water by keeping water from flowing backwards into a water supply line.

A backflow preventer is a check valve installed on potable water supply piping to prevent possible contamination of the water supply system by backflowing but contaminated water from the building into the outside public water supply mains. Backwater valves protect against weather conditions that cause sewage overflow such as heavy rain. Check valves prevent backflow into sump disposal lines wastewater lines sewage lift stations and ejector systems. During normal operation of an rpz backflow preventer the pressure between the two check valves referred to as the zone of reduced pressure is maintained at a lower pressure than the supply pressure.