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Sample Exam Questions and Recommended References …
www.abccert.orgB. Double check valve assembly C. Pressure vacuum breaker assembly D. Reduced pressure backflow assembly 9. While testing check valve #2 of a reduced pressure backflow assembly under backpressure, what would be observed if the second check valve was fouled? A. No differential on the test kit and no discharge from the relief valve B.
Backflow Prevention for Fire Sprinkler Systems
firesprinklertesting.orgReduce Pressure Zone (RPZ) or Reduced Pressure Backflow Assembly (RPBA) Two independently acting check valves together with a hydraulically operating, mechanically independent pressure differential relief valve located between the check valves and below the first check valve. These units are located between two tightly closed resilient seated