Fire Sprinkler System Inspection, Testing and Maintenance
What this domain tests
ITM questions come from NFPA 25 and test whether you know the frequency, method, and documentation for each task on valves, alarms, water supplies, dry valves, and fire pumps.
Core rules
- Weekly or monthly: valve status checks and gauge readings. Gauges are replaced every 5 years.
- Quarterly: waterflow alarm devices, supervisory devices, and alarm and valve testing.
- Annually: main drain flow test, fire pump flow test, antifreeze solution testing, and dry-pipe valve trip test.
- Every 3 years: full-flow trip test of a dry-pipe valve with the control valve fully open.
- Every 5 years: internal inspection of piping and replacement of gauges.
- Impairments require a documented procedure, notification to the AHJ, and a fire watch where required.
Worked example
An annual main drain test reads 12 psi residual at the test valve, compared with a baseline of 55 psi when the system was accepted. The large drop suggests a partially closed valve, a degraded supply, or an obstruction. Before writing it off as normal, verify the control valve is fully open and compare the static reading, then notify the owner and AHJ as an impairment.
Traps
Confusing NFPA 25 frequencies with NFPA 13 design rules; skipping the 5-year internal pipe inspection; trip-testing a dry valve without recording the time to trip; failing to document impairments and restoration.