NFPA 25 inspection, testing, and maintenance frequencies for sprinkler, standpipe, and fire pump systems — weekly, monthly, quarterly, annual, and the five-year internal pipe investigation — plus the deficiencies inspectors find most often and the documentation obligations that make an ITM program defensible.
A sprinkler system that passed acceptance testing at installation isn't guaranteed to still work correctly years later — valves get closed and forgotten, corrosion works invisibly on wetted pipe, and a dry system's air supply can fail quietly. NFPA 25 is the standard governing that ongoing sustained-performance obligation, genuinely distinct from the design standards (NFPA 13, 14, 20) this program's earlier modules covered. This module works through NFPA 25's inspection and testing frequencies in detail: weekly control valve and gauge checks, quarterly waterflow alarm testing, the comprehensive annual inspection, standpipe flow testing, fire pump churn and flow testing, and the five-year internal pipe investigation.
It closes with the deficiencies real inspections find most often — a closed control valve tops the list, followed by obstructed sprinkler clearance, corrosion, and low supervisory air pressure — and the inspector's reporting and impairment-notification obligations that turn ITM into a defensible, auditable program rather than a checklist performed and forgotten. This module assumes the sprinkler, standpipe, and fire pump design content from this program's earlier modules and this program's troubleshooting module (Module 17) builds directly on the deficiency patterns covered here.