Types of backflow prevention valves: Geelong | Torquay | Ocean Grove

Backflow Prevention Valve Testing | Geelong | Torquay | Ocean Grove

There are different types of backflow prevention valves to protect our water supply, such as:

  1. Atmospheric Vacuum Breakers (AVB): These are simple devices that rely on atmospheric pressure to prevent back-siphonage. They are often used in low-risk situations, such as garden hoses or irrigation systems.
  2. Pressure Vacuum Breakers (PVB): These valves are more complex than AVBs and use a spring-loaded check valve to prevent backflow. They are commonly used in residential and commercial applications.
  3. Reduced Pressure Zone (RPZ) Assemblies: These are more sophisticated backflow preventers that use two check valves and a relief valve to create a zone of reduced pressure between the two check valves, preventing backflow even if there is a significant pressure drop.
  4. Double Check Valve Assemblies (DCVA): DCVAs use two check valves to prevent backflow. They are typically used in commercial and industrial applications.
  5. Air Gaps: This is a physical separation between the potable water supply and any potential sources of contamination. It is considered the most effective method of preventing backflow but may not always be practical in all plumbing configurations.

The selection of the appropriate backflow prevention valve depends on the specific plumbing system's requirements and the potential level of contamination risk. Regular maintenance and testing of these devices are essential to ensure they are functioning correctly and providing the necessary protection against back-siphonage events.

Backflow prevention valves need to be tested annually. Tomlinson Plumbing is appropriately licensed to carry out testing.  Call us on 5261 2422.