If you own or manage a commercial building with a fire sprinkler system, NFPA 25 is the rulebook you live by. It specifies exactly how often each component must be inspected, tested, and maintained — and skipping any of it puts your building at risk of failed AHJ inspections, insurance issues, and worst of all, a non-functional system when you actually need it.
Weekly and Monthly Inspections
Weekly and monthly inspections are typically performed by your in-house maintenance team. Things like gauge readings on wet pipe systems (monthly), control valve position visual checks (monthly), and inspecting dry pipe system enclosures for proper heating (weekly during cold weather). Visual checks, not tests — don't require a certified technician.
Quarterly Inspections
Quarterly inspections require a certified technician and include testing of mechanical alarm devices, water flow alarm devices, supervisory signals, and hydraulic nameplates. Every three months, on schedule. These are the inspections most building owners forget, which is exactly why fire marshals love to ask about them.
Annual Inspections
The annual inspection is the big one. A certified technician performs a full external inspection of every sprinkler head, pipe, fitting, hanger, and support. Main drain tests verify water supply. Wet pipe systems include checking for proper water pressure. Dry pipe, pre-action, and deluge systems get additional specific tests. Full written report filed with your AHJ.
5-Year Internal Inspection
Every five years, your sprinkler system gets an internal inspection. Portions of piping are opened up and examined for corrosion, mineral buildup, and biological growth (MIC — microbiologically influenced corrosion, which can eat through pipes from the inside). The 5-year internal is the one most likely to catch problems that would otherwise go unseen for decades.
What Happens If You Skip
A lot. Your AHJ can red-tag your building and require immediate compliance. Your insurance carrier can cancel your policy or refuse to pay a claim. Your sprinkler system can fail when it matters most — and you'll be personally liable if someone was injured because you didn't maintain a life-safety system you legally had to maintain.
The good news: every NFPA 25 requirement is predictable. Schedule them, get them done, keep the reports. Fire Solutions NW handles NFPA 25 compliance for commercial facilities across 13 states — call 1-855-876-3473 for a fixed-quote service agreement.