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BACKFLOW PREVENTION ASSEMBLY TESTING MANUAL

BACKFLOW PREVENTION ASSEMBLY TESTING MANUAL

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Backflow Prevention Assembly Testing Manual Concept 4 check valve to atmospheric and observing the upstream pressure at which the check valve closes. Minimum acceptable value: 1.0 psi. Note: Accurate gauge readings of check valves are dependent on a solid downstream reference point. If the downstream test cock is at the highest point

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

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