Steps

Confirm which test is due: partial-flow trip test is required annually, full-flow at least every 3 years, and a full-flow test satisfies that year's partial-flow requirement
For partial-flow, throttle the control valve to limit water entry, trip the dry valve, and time the trip and alarm response
For full-flow, fully open the control valve, trip the valve, and let the system flood completely, recording time to trip and time to water discharge at the inspector's test connection
Record time to trip and time to water discharge at the inspector's test connection; NFPA 25 sets no fixed trip-time pass/fail threshold — trip time is logged and compared year-over-year as a trend indicator (water-delivery-time expectations come from NFPA 13's design requirements, which vary by hazard and system size, not from NFPA 25)
Fully drain the system afterward and reset the dry valve, air/nitrogen supply, and low-pressure alarm before returning to service
Document trip time, water delivery time, and priming water level for year-over-year trend comparison

Known gotchas

Skipping full drain-down after a full-flow test leaves residual water in low points, which freezes in cold climates and causes the exact pipe failures ITM is meant to prevent
Trip-time creep between tests can indicate a failing quick-opening device or partially seated clapper — NFPA 25 has no fixed pass/fail trip-time number, so the year-over-year trend is the signal to watch
Full-flow testing discharges significant water; drainage capacity and any occupied space below the test connection must be assessed before flooding the system

NFPA 25 ch. 13, pressure-reducing/pressure-control valves · 5 steps · unrated

Perform the 5-year standpipe system flow test and hydrostatic test

NFPA 25 ch. 6/13, standpipe systems · 6 steps · unrated

Perform the annual forward-flow test of a fire-line double check or RPZ backflow assembly protecting a sprinkler/standpipe water supply

NFPA 25 ch. 13 / cross-connection control, fire-line backflow assembly · 5 steps · unrated

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Perform an NFPA 25 dry pipe valve trip test (annual partial-flow vs. 3-year full-flow)

Steps

Known gotchas

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