Perform and document the annual fire pump churn/rated/150%-flow acceptance test
domain: NFPA 25 ch. 8, fire pump assembly · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Confirm the pump nameplate rated flow/pressure and the prior year's baseline curve before testing
Run the no-flow (churn) condition first, recording suction and discharge pressure
Flow at 100% of rated capacity through approved test devices (flowmeter or hose/pitot) and record discharge pressure
Flow at 150% of rated capacity and confirm discharge pressure does not drop below 65% of rated pressure
Compare all three data points to the pump's original acceptance curve to flag performance degradation
Restore valves/alarms to normal and notify the monitoring station of test start/end per impairment procedures
Known gotchas
A pump can pass churn and rated-flow readings but still fail at 150% flow if suction supply, strainer, or driver horsepower is marginal -- all three points must be tested, not just one
Diesel-driven pumps need engine-specific checks (fuel, cooling, battery, exhaust) layered onto the hydraulic test -- treating diesel like electric skips required items
Flowing large capacity through hose streams or a test header creates hazardous discharge/runoff; drainage and hose-stream safety must be planned before the flow, not during
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