Monthly Fire Extinguisher Inspection: Checklist and Log

NFPA 10, the standard for portable fire extinguishers, calls for extinguishers to be visually inspected when first placed in service and then at intervals of about 30 days. This monthly check is deliberately simple: it's a quick visual pass anyone on staff can do, designed to catch the obvious problems — a missing unit, a dead gauge, a blocked cabinet — between the annual maintenance visits done by a qualified professional.

The check itself takes about a minute per extinguisher. The part that trips facilities up is the recordkeeping: an inspection that isn't documented is, for practical purposes when a fire marshal or insurer asks, an inspection that didn't happen. This guide covers what to check, how to record it, and a log template you can copy.

Who this applies to

NFPA 10 is the reference standard most U.S. jurisdictions and insurers point to for portable extinguishers, and workplace fire-extinguisher rules commonly require monthly visual checks along the same lines. But adoption and enforcement vary — your state fire code, local fire marshal, insurer, and (for workplaces) occupational safety rules each have a say. Treat this guide as the widely used baseline and check your local requirements for anything your jurisdiction adds, such as who may perform annual maintenance or specific tag formats.

One distinction to keep straight: the monthly check is a visual inspection you can do in-house. It does not replace annual maintenance, periodic internal examination, or hydrostatic testing — those are separate, less frequent requirements typically performed by trained, certified personnel. If a monthly check finds a problem, the fix is to take the unit to (or call in) a professional, not to repair it yourself.

The monthly visual check, point by point

Walk to each extinguisher and verify six things:

In place and accessible: the extinguisher is in its designated location, mounted or in its cabinet, visible or clearly signed, and nothing is blocking access to it. Stock stacked in front of an extinguisher is one of the most common findings.
Pressure gauge in the operable range: the needle sits in the green zone. High or low, the unit comes out of service for professional attention. (Cartridge-operated units and CO2 units without gauges are checked differently — by weight or per the manufacturer.)
Fullness: lift or heft the unit to confirm it feels full. A gauge can read green on a unit that has lost agent.
Physical condition: no obvious damage — dents, corrosion, a cracked hose, a clogged or missing nozzle, leakage, or chemical residue around the valve.
Pin and tamper seal: the pull pin is in place and the tamper indicator or seal is intact. A broken seal suggests the unit may have been discharged, even briefly — and a partially discharged extinguisher can lose its remaining pressure.
Label and instructions: the operating instructions face outward and are legible, and the service tag is present and readable.

Any failed point means the extinguisher gets corrective action — professionally serviced, recharged, or replaced — and, if it's out of service, a spare covering its location in the meantime. Don't leave a failed unit hanging on the wall looking available.

Tip Do the walk on a fixed day each month — first Monday, the 1st, whatever survives contact with a busy schedule. The requirement is roughly every 30 days, and a fixed anchor day is the only reliable way small facilities keep the streak alive.

Recording it so it counts

NFPA 10 expects monthly inspections to be recorded — traditionally by initialing and dating the tag on the unit, and/or keeping records (paper or electronic) of who inspected each unit and when. When a fire marshal or insurance auditor visits, the tag and the log are what they look at. Twelve months of initials is the difference between a two-minute conversation and a finding.

A workable log has one row per extinguisher per month, and each entry captures:

Extinguisher ID and location (give every unit a permanent ID — 'warehouse east column B' beats 'the one by the door')
Date of the check
Inspector's name or initials
Pass/fail on each of the six points, not just an overall tick
For any fail: what was found, what corrective action was taken, and the date it was resolved

The per-point detail matters when something goes wrong later: a log that shows the gauge was green and the seal intact on the 3rd is far more useful than a bare checkmark. Keep records long enough to satisfy whoever audits you — a rolling 12 months is a common expectation, but retention rules vary, so check your local requirements.

Setting up the routine from scratch

Walk the site once and inventory every extinguisher: ID, type, size, location, and the last professional service date from the tag.
Assign each unit a permanent ID and mark it on the unit or its cabinet.
Pick the fixed monthly day and put it on the calendar with an owner and a backup person.
Run the first inspection using the six-point check and log every unit.
Flag anything past due for annual maintenance or hydro test dates shown on the tag, and book a service company for those units.
Repeat monthly; review the log quarterly for repeat offenders — a unit that keeps failing accessibility checks usually has a layout problem, not an inspection problem.

Monthly extinguisher check — per unit

In designated location, visible or signed, access unobstructed
Pressure gauge needle in the green / operable range
Feels full when lifted (or weighed, for units without gauges)
No dents, corrosion, leaks, hose cracks, or nozzle blockage
Pull pin in place, tamper seal intact
Operating instructions legible and facing outward; service tag present
Tag initialed and dated; result logged with inspector name
Any fail: unit pulled for service and location covered by a spare

Print this page or save it to your phone — the checklist works on paper.

Common questions

Can our own staff do the monthly inspection?

Yes — the monthly check is a visual inspection and NFPA 10 doesn't require a certified technician for it; any designated, briefed employee can do the walk. Annual maintenance and hydrostatic testing are different: those are generally performed by trained, certified personnel. Confirm any additional local rules with your fire marshal.

What if an extinguisher fails a check?

Take it out of service and have it professionally serviced, recharged, or replaced — don't attempt repairs in-house. If that leaves a location uncovered, place a spare there in the meantime. Record the finding, the action, and the resolution date in your log.

Is monthly really required, or just recommended?

NFPA 10 sets the roughly-30-day visual inspection interval, and it's commonly required in practice through fire codes, workplace safety rules, and insurance conditions. Which of those legally binds your specific site depends on your jurisdiction and occupancy — check your local requirements rather than assuming.

Do we still need the monthly checks if a service company inspects annually?

Yes. The annual maintenance visit and the monthly visual checks are separate items — the monthly walk exists precisely to catch problems in the eleven months between professional visits, like a discharged unit, a drifted gauge, or a blocked cabinet.