A backflow prevention valve is a plumbing device designed to allow water or other fluids to flow in only one direction, effectively preventing reverse flow (backflow) that could contaminate clean water supplies. It automatically closes if the flow reverses, ensuring that water from sources such as irrigation, industrial processes, or contaminated areas does not re-enter the main water supply.
Typical Description:
A backflow prevention valve consists of a mechanical barrier (like a flap, spring, or diaphragm) that opens when water flows in the intended direction and closes tightly when flow stops or reverses. These valves are made from durable materials such as brass, stainless steel, or PVC, and are available in various sizes to fit different pipe diameters.