Backflow Assembly Test Pass Criteria
Pass/fail per assembly type with the governing field-test criterion: RP relief opens >= 2 psid below the #1 check and the #1 check >= 5 psid; DC each check >= 1 psid. Per the USC FCCCHR Manual and AWWA C511.
Formula and source
RP pass: #1 check >= 5 psid AND relief opens >= 2 psid below the #1 check. DC pass: each check holds >= 1 psid tight.
USC FCCCHR Manual of Cross-Connection Control and AWWA C511 field-test procedure, by name.
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