Fire Extinguisher Monthly Inspection Checklist
A portable fire extinguisher inspection checks that the unit is present, accessible and shows no visible condition requiring service. It is not a discharge test. Monthly visual checks, annual maintenance and hydrostatic testing are different tasks.
On the monthly route: Check the designated location, clear access, charge indication appropriate to the unit, pin/seal, hose/nozzle, physical condition and service records. Record each defect and its follow-up owner.
Do not pull the pin or discharge the extinguisher to prove it works. A used, damaged or questionable unit needs the site’s replacement/service process while required protection is maintained.
Inspection versus portable fire extinguisher testing
For workplaces covered by OSHA’s portable-extinguisher rule, the visual inspection is monthly and a maintenance check is annual. Pressure testing is separate work for trained personnel with suitable equipment. Use the extinguisher type, manufacturer instructions, service history and applicable local requirements to establish its testing interval.
The cabinet photograph in this guide is an equipment example, not evidence that every visible unit has passed inspection. A gauge in the normal range does not cancel a damaged hose, blocked access or overdue service.
Track the route in the preventive maintenance calendar. An unresolved inspection defect belongs in the corrective-action and closure process.
How often to check
Monthly visual inspection
For workplaces covered by OSHA's portable-extinguisher rule, visually inspect portable extinguishers monthly. Make the check part of a recurring facility walk or CMMS inspection so missed units are visible.
Annual maintenance
OSHA requires an annual maintenance check. This is more than the technician's monthly walk-by inspection and should be completed by personnel qualified for the required extinguisher maintenance.
Additional interval maintenance and testing
Some extinguisher types require internal maintenance and hydrostatic testing at specified intervals. The interval depends on extinguisher type; do not use a blanket age rule for every extinguisher.
What to check each month
1. Location and access
Confirm the extinguisher is in its designated location, readily accessible, visible or properly identified, and not blocked by furniture, storage, equipment or a difficult-to-open cabinet.
2. Pressure or charge indication
For an extinguisher with a pressure gauge, confirm the pointer is in the manufacturer's operable range — commonly the green zone. Do not assume every extinguisher type uses the same charge indicator.
3. Pin and tamper seal
Confirm the pull pin is present and the tamper indicator or seal is intact. A missing pin, broken seal or evidence of operation needs follow-up rather than simply installing a new seal and walking away.
4. Hose and nozzle
Look for cracks, cuts, deterioration, loose connections or an obstructed discharge opening. Do not probe into or dismantle the valve or hose assembly as part of a routine visual inspection.
5. Cylinder, handle and mounting
Look for dents, corrosion, leakage, heat/fire exposure, damaged handles, damaged threads or other mechanical injury. Confirm the extinguisher is secure in the intended bracket or cabinet.
6. Label and operating instructions
Make sure the operating instructions/nameplate are legible and facing outward where practical. Confirm the extinguisher has not obviously been swapped with an incompatible location or hazard without authorization.
7. Inspection and service record
Record the monthly inspection according to your site process. Check the annual-maintenance record/tag and any service markings so overdue professional maintenance or testing is not missed.
When to call a qualified fire-protection service company
• The gauge or charge indicator is outside its operable range.
• The extinguisher has been used or partially discharged.
• The pin or tamper seal is missing/broken and the cause is not clearly documented.
• You find leakage, significant corrosion, dents, heat/fire exposure, damaged threads, a damaged valve/handle, cracked hose, blocked nozzle or missing parts.
• Required annual maintenance or interval testing is overdue or cannot be verified.
• The extinguisher type, rating, condition or suitability for the location is uncertain.
• The unit needs recharge, internal maintenance, hydrostatic testing, repair or replacement.
• Your site procedure, fire marshal/AHJ or applicable code requires specialist involvement.
Do not leave a questionable extinguisher silently in service. Follow the site's impairment/replacement procedure and ensure required fire protection remains available while a unit is removed for service.
Annual maintenance, six-year maintenance and hydrostatic testing
OSHA requires annual maintenance of workplace portable extinguishers. For certain stored-pressure dry-chemical extinguishers that have a 12-year hydrostatic-test interval, OSHA also requires applicable maintenance every six years; non-refillable disposable dry-chemical containers are exempt from that six-year requirement. Hydrostatic-test intervals vary by extinguisher type — common intervals include 5 or 12 years — so verify the extinguisher type and service record rather than judging by age alone.
Leave a useful maintenance record
Record the extinguisher ID/location, inspection date, accessibility, gauge/charge indication where applicable, pin/seal condition, hose/nozzle condition, visible cylinder condition, tag/service status, deficiencies found, action taken and who owns the follow-up. A completed inspection means the inspection occurred; it does not override a defect or certify specialist service.
References and further reading
Use the installed extinguisher's manufacturer instructions, your site's fire-protection program and local requirements first. These public references support the inspection and maintenance intervals described above.
- OSHA 29 CFR 1910.157 — Portable fire extinguishers
- OSHA portable-extinguisher monthly inspection checklist
Related guides
What to document
Record extinguisher ID/location, date, each inspected condition, service-due status, actual deficiencies and action owner. Distinguish “inspection completed” from “acceptable condition”; record replacement coverage when a unit leaves service.
Tools that fit this task
Use what you already own first. These affiliate links may earn a commission at no extra cost to you. Confirm model and compatibility before buying.
Record location, readings, defects, responsible person, and follow-up date.