TL;DR - Key Takeaways
- • Monthly: Every 30 days, visual check by building owner - 30 seconds per extinguisher
- • Annual: Every 12 months, full hands-on by certified technician - 2-5 minutes per extinguisher
- • Hydrostatic: 5 years for CO2/wet chemical, 12 years for dry chemical - certified facility only
Fire Extinguisher Inspection Frequency Guide
Fire-extinguisher inspection frequency depends on the inspection type, equipment, adopted edition, and jurisdiction. This general research-based overview describes topics to verify with official sources and qualified professionals; it does not set a schedule for your site.
Complete Inspection Frequency Table
| Inspection Type | Frequency | Performed By | NFPA Reference |
|---|---|---|---|
| Monthly visual | Every 30 days | Building owner/staff | §7.2 |
| Annual maintenance | Every 12 months | Certified technician | §7.3 |
| 6-year internal (stored-pressure dry chemical) | Every 6 years | Certified technician | §7.3.3.1 |
| Hydrostatic test (dry chemical) | Every 12 years | DOT-certified facility | §8.3 |
| Hydrostatic test (CO2) | Every 5 years | DOT-certified facility | §8.3 |
| Hydrostatic test (wet chemical, Class K) | Every 5 years | DOT-certified facility | §8.3 |
| Hydrostatic test (clean agent) | Every 12 years | DOT-certified facility | §8.3 |
Frequency by Extinguisher Type
Dry Chemical (ABC) — Most Common
- Monthly: Visual inspection every 30 days
- Annual: Full maintenance by certified technician
- 6-Year: Internal examination at 6 years from manufacture date
- 12-Year: Hydrostatic pressure test
Dry chemical ABC extinguishers are the workhorse of commercial fire protection — found in offices, retail, warehouses, and schools. The 6-year internal exam is unique to stored-pressure dry chemical types and is often missed by building owners who think annual inspections cover everything.
CO2 (Carbon Dioxide)
- Monthly: Visual inspection (check weight by lifting — CO2 has no gauge)
- Annual: Full maintenance (weight verification is critical)
- 5-Year: Hydrostatic testing (more frequent than dry chemical)
CO2 extinguishers require hydrostatic testing every 5 years — 7 years sooner than dry chemical types. They also need weight checks during monthly inspections since they have no pressure gauge. A CO2 extinguisher that has lost more than 10% of its charged weight must be recharged.
Wet Chemical (Class K)
- Monthly: Visual inspection
- Annual: Full maintenance
- 5-Year: Hydrostatic testing
Found in commercial kitchens. Class K extinguishers must be within 30 feet of cooking equipment and inspected at the same frequency as CO2 types. The annual maintenance must include verification that the extinguisher is properly matched to the kitchen's suppression system.
What Happens If You Miss an Inspection?
Monthly inspection missed: Review the gap promptly with the responsible team, applicable requirements, and qualified professional. This page cannot predict whether an AHJ will issue a citation or how an insurer will treat the record.
Annual inspection missed: Review the record and equipment promptly with a qualified professional. The applicable edition, site rules, AHJ process, contract, and insurer requirements determine the next step; do not assume a missed date automatically produces a citation, denial, or required removal.
6-year or hydrostatic test missed: Stop and obtain qualified advice on the equipment type, adopted edition, manufacturer instructions, and applicable process. Do not infer from this page alone whether the extinguisher must be removed, tested, replaced, or reported.
How to catch missed inspections before they become problems
Paper, calendars, and spreadsheets can make recurring work harder to review. FireInspected's current beta focuses on recording dates and service history; it does not promise automated reminders or determine which interval applies.
How FireInspected organizes inspection history
FireInspected provides customer, equipment, and inspection-history records so a qualified team can review planned dates and service notes. The beta does not automatically decide which interval applies or promise reminders. Confirm the applicable edition, manufacturer instructions, and local requirements before scheduling work.
The beta can organize customer, equipment, and inspection-history records where configured. It does not promise a complete history, automatic due-date decisions, proof of compliance, or acceptance during an AHJ or insurance review.
For a deeper dive into the complete inspection checklist, see our NFPA 10 inspection requirements guide. For a side-by-side comparison of monthly vs annual procedures, see our monthly vs annual inspection guide. And for the full frequency explanation with FAQ, see our complete inspection frequency blog post.
More NFPA 10 guides
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FireInspected organizes service documentation; it does not replace adopted requirements, manufacturer instructions, qualified service work, or AHJ direction.