Inspection, Testing, and Maintenance (NFPA 25)
This domain tests NFPA 25 frequencies and the judgment behind them. The exam asks what to inspect, test, or maintain, how often, and what result triggers follow-up.
Frequencies to know
Control valves and gauges receive frequent visual checks, often weekly or monthly depending on the system and supervision. Waterflow alarm tests are typically quarterly. Main drain flow tests and dry-pipe valve trip tests are annual. Internal pipe inspections and gauge replacement are commonly on a five-year cycle. Standpipe hose valves and fire department connections require periodic inspection and flow testing. Always apply the edition adopted by the AHJ.
What the test tells you
A main drain test compares static and residual pressure with a baseline. A significant drop suggests a partially closed valve, a supply degradation, or a blockage. An inspector's test confirms that waterflow alarms activate within the required time. A dry-pipe trip test confirms valve operation and air priming.
Worked example
An annual main drain test previously showed 55 psi residual. This year it shows 45 psi, an 18 percent drop. Do not simply record the number. Investigate for a partially closed control valve, a changed supply, or a blockage, then restore and retest. Document the baseline and the corrective action.
Traps
Treating every item as annual; confusing inspection with maintenance; missing the five-year internal pipe and gauge requirements; failing to test the flow switch; and recording a failing main drain test without investigation.
Records
Keep inspection tags, test reports, and correction records on site. Deficiencies need a timeline and follow-up, not just a note in the log.