BACKFLOW PREVENTION ASSEMBLY TESTING MANUAL

← Back to document page

BACKFLOW PREVENTION ASSEMBLYTESTING MANUALLos Angeles County Department of Public HealthEnvironmental ProtectionCross-Connection and Water Pollution Control ProgramTABLE OF CONTENTSTESTING TECHNIQUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 1-2CONCEPTS OF BACKFLOW PREVENTIONASSEMBLY TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 3-4SINGLE CHECK TYPE PRESSURE VACUUM BREAKERTUBE TEST PROCEDUREAir Inlet Opening Point . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 5-6Check Valve Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 7TWO CHECK TYPE PRESSURE TYPE VACUUM BREAKERTUBE TEST PROCEDUREAir Inlet Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . 8-9Check Valve Operation.

procedures described under DOUBLE CHECK VALVE ASSEMBLIES. NOTE: While the use of water columns (tubes) for field test reporting purpose has been eliminated, testers will still be required to demonstrate proficiency in tube testing of double check valve assemblies and pressure type vacuum breakers at the time of certification and recertification.

  Manual, Testing, Prevention, Assembly, Tester, Assemblies, Backflow, Backflow prevention assembly testing manual