Fire Protection Systems and Equipment
Know the system, then the interval
For each system, answer three questions: what does it do, what are its components, and how often is it inspected, tested, or maintained?
Sprinklers. Wet, dry, preaction, deluge, and residential systems. Know riser components: main drain, alarm and check valves, gauges, flow switch, inspector's test connection, and the waterflow alarm. Maintenance standards require annual main drain flow tests, annual waterflow alarm tests, annual dry-pipe valve trip tests with periodic full-flow trip testing, gauge replacement or calibration on a multi-year cycle (commonly five years), and five-year internal inspections of piping.
Standpipes. Classes I, II, and III by hose size and intended user; hose valves and caps in place, threads compatible, hydrostatic test on a multi-year cycle.
Fire pumps. Weekly no-flow (churn) runs and an annual flow test with the results recorded; watch for closed valves and unrepaired deficiencies.
Detection and alarm. Initiating devices, notification appliances, the fire alarm control panel, annunciation, and monitoring of supervisory signals; annual testing with documented results, plus sensitivity testing of smoke detectors.
Extinguishers. Monthly visual inspection by the occupant, annual maintenance by a technician, and longer-cycle internal examination and hydrostatic testing. A frequent trap: stored-pressure dry chemical units follow a six-year internal examination and twelve-year hydrostatic test cadence, while some other types use a five-year hydrostatic interval.
Water supply and access. Hydrant spacing, clearance, and operability; fire department connections clear, capped, and visible; backflow assemblies tested annually.
Traps: mixing monthly with annual; assuming an alarm test covers sprinkler inspection; treating an impairment as acceptable because a contractor was called; missing closed control valves.
Rule of thumb: valve status and gauge readings first-closed valves and static-pressure anomalies explain most real-world failures.