If someone is coming to inspect your fire sprinkler system and you're not sure what to expect — this breaks down the process from start to finish.
What an annual NFPA 25 inspection covers
The annual inspection is the most comprehensive regular inspection in the NFPA 25 maintenance schedule. It covers every component of your water-based fire protection system. Here's what gets checked:
Sprinkler heads
Every sprinkler head in the building gets a visual inspection. We're looking for:
- Physical damage — dents, corrosion, paint overspray
- Proper clearance from storage or obstructions (18-inch rule)
- Correct orientation and position
- Missing or improper escutcheons
- Evidence of leakage at the head or fitting
Painted sprinkler heads are a common deficiency. If heads have been painted during a renovation, they need to be replaced — paint can cause them to fail to activate properly.
Control valves
All control valves are inspected for position (open/closed), condition, and accessibility. In most buildings this includes the main OS&Y valve, sectional valves, and any zone control valves. A partially closed valve is a critical deficiency — if the valve isn't fully open, the system can't supply adequate pressure to fight a fire.
Alarm devices
Waterflow alarm switches, pressure switches, and other alarm-initiating devices are tested to verify they operate correctly. This means flowing water through the inspector's test valve and confirming the alarm activates.
Fire department connections (FDC)
The FDC — the standpipe the fire department connects to from the street — gets an inspection for damage, accessibility, and whether it's properly capped. A damaged or obstructed FDC is a deficiency.
Gauges
System gauges are checked against acceptable ranges. Gauges that show readings outside normal ranges — or gauges that are broken — need to be replaced.
Pipe, hangers, and fittings
Accessible piping is inspected for corrosion, mechanical damage, leakage at fittings, and proper support. Pipes that have been painted, damaged, or are missing hangers get noted.
What the inspection report looks like
At the end of the inspection, you receive a written report that documents:
- Date and time of inspection
- Inspector name and license number
- Building and system information
- All components inspected and their condition
- Test results (waterflow alarm, control valve position, etc.)
- Deficiencies found and their severity
- Recommended correction timeline for each deficiency
Keep this report. Your insurance carrier, fire marshal, and building inspector may ask for it. Some jurisdictions require a copy to be submitted to the local fire department or AHJ.
If deficiencies are found
Not every deficiency is a crisis. NFPA 25 categorizes deficiencies as:
- Impairment: The system or a portion of the system is out of service. This requires immediate action — the system needs to be restored or a fire watch established.
- Deficiency: Something that doesn't meet code but doesn't take the system out of service. These need to be corrected in a reasonable timeframe, typically 30 days.
When we find deficiencies, we document them clearly and provide a recommended correction timeline. If you need repairs, we can handle them — we do service work as well as inspections.
How to prepare for your inspection
You don't need to do much to prepare. A few things that help:
- Make sure all areas of the building are accessible, including mechanical rooms, attics, and any locked spaces where sprinklers or control equipment are located.
- Have previous inspection reports available if you have them.
- Notify building occupants that alarm testing will occur — the inspector's test valve will briefly trigger the waterflow alarm during testing.
That's about it. We'll handle the rest.