Double Check Valve Coupling - Brass, Standard Size, Silver Color, Galvanized Surface - Prevents Backflow Of Contaminated Water, Reliable In Industrial Applications

A double check valve coupling, also known as a DCV coupling, is a device used in plumbing and piping systems to prevent backflow of contaminated water into a potable water supply. It is typically installed at the service connection to a building, where the potable water supply enters the building. A double check valve coupling consists of two check valves, which are spring-loaded devices that allow water to flow in only one direction. The first check valve prevents backflow from the building into the potable water supply, and the second check valve prevents backflow from the potable water supply into the building. The two check valves are separated by an air gap, which provides an additional layer of protection against backflow. Double check valve couplings are required in many areas by local plumbing codes and regulations to ensure the safety and quality of potable water supplies. They are also used in industrial and commercial settings where backflow of contaminated water could pose a risk to public health or the environment. Double check valve couplings are typically made of brass or other durable materials and are designed to be maintenance-free and reliable. They are available in a variety of sizes and configurations to meet the specific needs of different plumbing and piping systems.