Water Check Valve Backflow Preventer

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.

Water check valve backflow preventer.

Back siphonage occurs when higher pressure fluids gases or suspended solids move to an area of lower pressure fluids. Backflow preventers prevent contamination of potable water by keeping water from flowing backwards into a water supply line. 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. Backwater valves protect against weather conditions that cause sewage overflow such as heavy rain.

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