TESTING REDUCED PRESSURE BACKFLOW …
testing reduced pressure backflow preventers 1) bleed test ports to remove any debris, bleeding in sequence 4, 3, 2, 1 or 4, 1, 2, 3, leaving # …
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TESTING DOUBLE CHECK VALVE ASSEMBLIES 1) 3)
www.nerwa.orgtesting double check valve assemblies 1) bleed test ports to remove any debris 2) close all valves on tester 3) close shut-off valve # 2 4) attach high hose to test port # 2 5) attach low hose to test port # 3 and open both 6) bleed air from hoses and tester, bleeding low side last. gauge should read at least 1.0 psid 7) loosely attach bypass hose to test port # 4.
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