Home › Forums › Exchange Brokers Discussion › What are the Different Types of Backflow Prevention Devices?

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  • 03/21/2023 at 2:51 PM #1252905
    sunlightsprinklers
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    There are several different types of backflow prevention devices from which you can perform backflow pressure test, each designed to prevent water from flowing back into the public water supply in a specific manner. Some of the most common types of backflow prevention devices include:

  • Double Check Valve Assembly (DCVA): A DCVA is a type of backflow prevention device that consists of two check valves and an intermediate chamber. The device is designed to prevent backflow by only allowing water to flow in one direction.
  • Reduced Pressure Zone Device (RPZD): An RPZD is a type of backflow prevention device that uses two check valves and a pressure-relieving valve to prevent backflow. The device is designed to maintain a specific pressure differential between the protected side of the system and the public water supply.
  • Pressure Vacuum Breaker (PVB): A PVB is a type of backflow prevention device that uses a spring-loaded check valve to prevent backflow. The device is designed to open and relieve pressure if the pressure in the protected side of the system exceeds a certain level.
  • Air Gap: An air gap is a type of backflow prevention device that uses a physical separation between the protected side of the system and the public water supply to prevent backflow. The air gap is typically created by installing a fixture, such as a sink, at a higher elevation than the water supply.

    • Each type of backflow prevention device has its own advantages and disadvantages, and the appropriate device for a particular application will depend on the specific requirements of the system. It is important to consult with a certified backflow tester to determine the best type of device for your needs.