What are types of backflow protection?
  • An Approved Air Gap Separation
  • Mechanical Assemblies used in the prevention of backflow are separated into three types:
    • Double Check Valve Assemblies (DCVA), including Double Check Detector Check (DCDA)
    • Pressure Vacuum Breaker Assemblies (PVBA) and Spill-Resistant Pressure Breaker Assemblies (SVBA)
    • Reduced Pressure Backflow Assemblies (RPBA) including Reduced Pressure Detector Assemblies (RPDA)
  • Mechanical Devices used in the prevention of backflow include:
    • Dual Check Backflow Preventer
    • Dual Check with Atmospheric Vent, also known as a Backflow Preventer with Intermediate vent
    • Hose Bib Vacuum Breaker device (HBVB), also known as a Hose Connection Vacuum Breaker
    • Residential Meter Check
    • Atmospheric Vacuum Breaker (AVB)

Show All Answers

1. What is a cross connection?
2. What is Backflow?
3. What are common examples of cross connection hazards (source of contamination) that need to be protected with a backflow preventer?
4. Why is a backflow preventer necessary?
5. What is the legal basis for a local cross connection control program?
6. Do I currently have adequate backflow protection? And, how can I find out?
7. What is my liability as a building owner property manager and water purveyor?
8. What are types of backflow protection?
9. How often do backflow assemblies have to be tested?
10. Who can test the backflow assembly?
11. What to do if my backflow assembly fails the annual test?