Water Check Valve Backflow Preventer

If either check valve should leak the relief valve is designed to open and discharge water to the outside ensuring that backflow never occurs.

Water check valve backflow preventer.

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. 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. Check valves prevent backflow into sump disposal lines wastewater lines sewage lift stations and ejector systems.

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