{"id":"de011764-8c80-4d87-84ab-7437d63729ec","task":"Perform the annual forward-flow test of a fire-line double check or RPZ backflow assembly protecting a sprinkler/standpipe water supply","domain":"NFPA 25 ch. 13 / cross-connection control, fire-line backflow assembly","steps":["Confirm assembly type (double check valve assembly, double check detector assembly, RP, or RPDA) since test procedures and criteria differ by type","Perform the forward-flow test to verify the assembly delivers the system's required demand flow and pressure, in addition to the standard cross-connection differential-pressure certification test","Coordinate scheduling and test method with the local water purveyor/cross-connection control program, since the utility's annual backflow certification and the fire-flow demand test are often separate requirements enforced by different authorities","Record results comparing flowed pressure/flow to the original hydraulic design demand for the fire protection system","Report any failure to meet fire-flow demand to the owner/AHJ as a potential impairment of the water supply, independent of whether the assembly still passes its standard backflow certification"],"gotchas":["Passing the water utility's annual backflow certification (valve seating/differential pressure) does NOT confirm the assembly can pass the required fire-system demand flow -- these are two different tests enforced by two different authorities and are commonly conflated","Detector assemblies (DCDA/RPDA) have a bypass meter that must also be checked for excessive friction loss at fire-flow rates -- an undersized bypass can throttle flow even when the main assembly tests fine","A generic cross-connection tester without fire-flow demand testing experience/equipment can produce a result that satisfies the water utility while leaving the fire-flow adequacy unverified"],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.686Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/de011764-8c80-4d87-84ab-7437d63729ec"}