Portable fire extinguishers are the first line of defense for incipient-stage fires, but only when they are properly charged, accessible, and maintained. NFPA 10, the Standard for Portable Fire Extinguishers, establishes the minimum inspection, maintenance, and testing requirements for all types of portable and wheeled extinguishers. An extinguisher with a discharged cylinder, blocked access, missing pull pin, or corroded shell can fail at the critical moment. This guide covers the complete NFPA 10 inspection schedule with a free downloadable checklist.
Free Fire Extinguisher Inspection Checklist
Download our Word document checklist covering monthly inspections, annual maintenance, 6-year internal exams, and hydrostatic testing per NFPA 10.
Download Checklist (.docx)Regulatory Framework
NFPA 10 — Standard for Portable Fire Extinguishers
- Scope: Covers selection, installation, inspection, maintenance, recharging, and testing of all portable and wheeled fire extinguishers.
- Inspection frequencies: Monthly visual inspections, annual professional maintenance, 6-year internal examination (stored-pressure), and hydrostatic testing at 5- or 12-year intervals depending on extinguisher type.
- Documentation: All inspections must be recorded with date, inspector initials, and findings. Annual maintenance requires a dated service tag attached to the extinguisher.
- Condemning: Extinguishers must be removed from service if they fail hydrostatic testing, show signs of corrosion or mechanical damage that compromises the shell, have been repaired by soldering, welding, or brazing, or are listed/obsolete types no longer recognized by NFPA 10.
Applicable Fire Codes and Standards
- International Fire Code (IFC) Section 906: Requires portable fire extinguishers in all occupancies, inspected and maintained per NFPA 10.
- NFPA 1 Fire Code Chapter 13: Same requirement for NFPA 10 compliance for all portable extinguishers.
- OSHA 1910.157: Requires employers to provide and maintain portable fire extinguishers in the workplace. Monthly visual inspections and annual maintenance required. Employees designated to use extinguishers must receive training.
- OSHA 1926.150: Construction site fire protection requirements including extinguisher placement and inspection.
Condemned extinguishers: Remove from service immediately any extinguisher that has a damaged or corroded shell, has been repaired by welding or brazing, uses an obsolete agent (carbon tetrachloride, chlorobromomethane, or inverting-type), or has no current service tag. Replace with a properly rated unit and dispose of the condemned extinguisher per local regulations.
Part 1: Monthly Visual Inspection
| Inspection Item | What to Check |
|---|---|
| Location and access | Extinguisher in designated location per floor plan. Not blocked, hidden, or obstructed. Mounting height correct: top handle no higher than 5 feet for units 40 lbs or less, 3.5 feet for heavier units. Signage visible from normal approach path. Travel distance within NFPA 10 limits (75 feet Class A, 50 feet Class B). |
| Pressure gauge | Needle in the green (operable) range. Gauge face readable and not damaged. Note: CO2 extinguishers do not have pressure gauges—verify charge by weight instead. Pressure gauges on stored-pressure units should be in the green zone; any reading in the red requires immediate service. |
| Pull pin and tamper seal | Pull pin in place and not bent or corroded. Tamper seal (plastic breakaway tie or wire) intact and not broken. A broken tamper seal indicates the extinguisher may have been partially discharged, tampered with, or used and not recharged. |
| Physical condition | No dents, corrosion, or damage to the cylinder, valve, handle, or hose. Hose and nozzle free of cracks, blockage, and deterioration. No chemical residue around the valve that could indicate a slow leak. Nameplate and operating instructions legible and facing outward. |
| Weight (CO2 units) | CO2 extinguishers must be weighed to verify charge. Weight must be within the tolerance shown on the nameplate. A loss of 10 percent or more of the net weight requires recharging. Use a calibrated scale and record the actual weight. |
| Inspection tag | Current monthly inspection tag or label attached. Date, inspector initials, and any noted conditions recorded. Tags should show an unbroken chain of monthly inspections going back to the most recent annual maintenance date. |
Part 2: Annual Maintenance
| Inspection Item | What to Check |
|---|---|
| External examination | Thorough examination of all external components: cylinder, valve assembly, carrying handle, hose, nozzle, and mounting bracket. Look for corrosion, dents, thread damage, and signs of tampering. Confirm the unit has not been exposed to excessive heat or environmental damage. |
| Mechanical parts | Extinguisher handle, levers, and locking mechanisms operate smoothly. Pull pin removes freely without excessive force. Valve stem and O-rings in good condition. Hose connection secure. Pressure relief device present and not obstructed (where applicable). |
| Agent and expellant | Verify correct type, amount, and condition of extinguishing agent. Stored-pressure units: verify pressure is in the operable range. Cartridge-operated units: check cartridge weight and condition. Weigh CO2 and halogenated agent extinguishers. Loaded stream and antifreeze agents checked for proper solution concentration. |
| Hose and nozzle | Hose free of cracks, cuts, or blockage. Nozzle or horn free of obstruction and properly attached. Hose gaskets and connections in good condition. CO2 horn not cracked or damaged. Dry chemical nozzle tip clear of packed agent. |
| Labeling and rating | UL or FM listing label present and legible. Operating instructions clearly visible. HMIS or pictogram labels for hazard classification in place. Extinguisher rating (e.g., 2A:10B:C) matches the hazard classification of the area per the fire protection plan. |
| Service collar and tag | Attach new annual maintenance service tag with date, technician name, and company. Install a new verification-of-service collar (round disc) at the neck of stored-pressure extinguishers each time the unit is opened for maintenance. Collar dates must match internal exam dates. |
Part 3: 6-Year Internal Examination
| Inspection Item | What to Check |
|---|---|
| Stored-pressure units | Every 6 years, all stored-pressure extinguishers (except disposable nonrechargeable types) must be emptied and subjected to an internal examination. Examine the cylinder interior for corrosion, pitting, thread damage, or evidence of agent degradation. Clean, recharge with proper agent, and repressurize. |
| Valve and components | Disassemble the valve assembly. Inspect stem, O-rings, springs, and dip tube. Replace any worn or damaged components. Clean all parts per manufacturer specifications. Verify threads are clean and not cross-threaded upon reassembly. |
| Verification collar | After any internal examination, install a new verification-of-service collar around the cylinder neck beneath the valve. The collar indicates the extinguisher has been opened and serviced. Record the date of internal examination on the service tag. |
Part 4: Hydrostatic Testing
| Inspection Item | What to Check |
|---|---|
| 5-year hydrostatic test | Applies to: stored-pressure water, AFFF, FFFP, and wet chemical (Class K) extinguishers; CO2 extinguishers; and all carbon dioxide hose assemblies. Test at the pressure specified on the cylinder or NFPA 10 Table 8.3.1. Extinguishers that fail must be condemned and replaced. |
| 12-year hydrostatic test | Applies to: dry chemical stored-pressure extinguishers, dry chemical cartridge-operated extinguishers, dry powder stored-pressure and cartridge-operated extinguishers, and halon/clean agent extinguishers. Test at the pressure specified on the cylinder or NFPA 10 Table 8.3.1. |
| Test procedures | Hydrostatic testing must be performed by trained personnel with proper equipment including a hydrostatic test pump, cage or barrier, and calibrated pressure gauges. Test pressure held for a minimum of 30 seconds for low-pressure cylinders and 1 minute for high-pressure cylinders. Cylinders showing permanent expansion, distortion, leakage, or other defects must be condemned. |
| Marking after test | Cylinders passing hydrostatic testing must be marked with the month and year of test, test pressure used, and the identification of the testing agency. Marking must be by low-stress steel stamp, pressure-sensitive label, or other method that does not compromise cylinder integrity. |
NFPA 10 inspection frequency summary: Monthly: visual inspection by trained staff (location, access, pressure, pin/seal, condition). Annually: professional maintenance by certified technician (thorough examination, agent verification, mechanical parts, service tag). Every 6 years: internal examination of stored-pressure extinguishers (empty, inspect interior, recharge, new collar). Every 5 or 12 years: hydrostatic testing depending on extinguisher type. After any use: immediate recharge and return to service or replace.
Download the Free Checklist
Get our fire extinguisher inspection checklist in Word format. Covers all NFPA 10 inspection frequencies and extinguisher types.
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