Water Check Valve Backflow Preventer

Backflow preventers prevent contamination of potable water by keeping water from flowing backwards into a water supply line.

Water check valve backflow preventer.

Backflow preventers prevent contamination of potable water by keeping water from flowing backwards into a water supply line. 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. They are used in industrial settings where chemicals are connected to water lines and in municipal water systems to keep undesirable liquids and solids from contaminating plumbing. Back siphonage occurs when higher pressure fluids gases or suspended solids move to an area of lower pressure fluids.

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. If either check valve should leak the relief valve is designed to open and discharge water to the outside ensuring that backflow never occurs. It s compact modular design means easy maintenance with a single access cover for in line repairs. 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.