Backflow prevention devices are crucial for ensuring the safety of the public water supply by preventing water contamination through the backflow of water from a customer's plumbing system. A backflow preventer valve is a specific type of device that prevents the reverse flow of water in the main water supply lines. This mechanical valve allows water to flow only in one direction, from the city's public water supply to the customer's plumbing system. In case of a drop in pressure in the main water supply, the valve closes to prevent the backflow of water into the public water supply. Backflow preventer valves find common use in commercial and industrial applications. Install a backflow preventer valve to safeguard your water supply and ensure uninterrupted access to clean water.