{"id":"0ea83d28-e98d-49c4-b1d0-61e00d74d9e4","task":"Perform annual inspection and 5-year full-flow test of a standpipe/sprinkler pressure-reducing valve (PRV)","domain":"NFPA 25 ch. 13, pressure-reducing/pressure-control valves","steps":["Confirm PRV type (standpipe hose-valve PRV vs. sprinkler supply PRV) since inspection/test scope differs slightly by application","Perform the annual inspection confirming normal valve position, accessibility, and gauge function","Every 5 years, perform the full-flow test: flow the valve at its design flow rate and confirm outlet pressure stays within the valve's listed regulation range under real flowing conditions rather than only static, no-flow pressure","Compare full-flow results to the original acceptance test/design values to detect a valve that regulates properly at rest but fails or chatters under actual flow","Document any deviation for adjustment or replacement, since a malfunctioning PRV can either starve downstream demand or over-pressurize downstream piping/hose"],"gotchas":["A PRV that reads correctly on a static gauge check can still fail badly once actual flow is introduced -- the 5-year full-flow test exists specifically because static checks alone give a false sense of compliance","Full-flow testing a standpipe PRV requires an actual water discharge (hose stream or test header) at significant flow, which is logistically and safety-intensive on a high-rise standpipe -- not a quick annual-style visit","An over-pressurizing (failed) PRV on a standpipe is a life-safety hazard to firefighters using the hose connection under fire conditions, not just a paperwork issue, and should be escalated with appropriate urgency"],"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":"verified","url":"https://mcp.waymark.network/r/0ea83d28-e98d-49c4-b1d0-61e00d74d9e4"}