How often do fire extinguishers need to be inspected?
"How often" has more than one answer, because "inspection" covers a few different jobs on a few different clocks. Here is the whole cadence at a glance, then each interval explained.
| Service | What it is | How often | Standard |
|---|---|---|---|
| Monthly visual inspection | A quick owner-level look that confirms the unit is present, charged, and ready. | Every 30 days | NFPA 10 |
| Annual external maintenance | A hands-on external service by qualified personnel, ending in a fresh dated tag. | Every 12 months | NFPA 10 |
| Internal examination | The unit is opened and examined inside, then recharged. For stored-pressure units. | Every 6 years | NFPA 10 |
| Hydrostatic test | A pressure test of the shell itself. Water, CO2, and wet-chemical units run the shorter cycle. | Every 12 years (5 years for water, CO2, and wet-chemical units) | NFPA 10 |
| Kitchen-suppression system service | Pre-engineered wet-chemical systems over commercial cooking lines. | Every 6 months | UL-300 / NFPA 17A |
Requirements vary by jurisdiction and by the adopted edition — treat this as the baseline and verify each interval with your AHJ.
The monthly (30-day) visual inspection
Between professional visits, the building’s own staff give each extinguisher a fast look about every 30 days: is it in its designated location, is the gauge needle in the operable range, are the pull pin and tamper seal intact, is anything blocking it. This one is a quick owner-level check, not a service — it confirms the unit is present, charged, and ready.
The annual external maintenance
Once a year, qualified personnel perform a full external maintenance: a hands-on examination of the unit’s condition, the gauge, the hose and nozzle, the shell, and the tag. This is the every-12-months service that puts a fresh dated tag on the unit, and it applies to every portable extinguisher, whatever the agent inside.
The 6-year internal examination
Stored-pressure extinguishers get an internal examination every 6 years: the unit is opened, the inside is examined, the agent and seals are serviced, and it is recharged. It is the mid-life service that sits between the annual maintenance and the hydrostatic test.
The 12-year hydrostatic test (5 years for water, CO2, and wet-chemical units)
The shell itself is pressure-tested on the longest cycle of any service — every 12 years for most extinguishers. Water, CO2, and wet-chemical units run the shorter 5-year cycle for their shell test. A shell that passes is returned to service with the test date recorded on it; one that fails is retired.
Kitchen suppression: semi-annual
Pre-engineered kitchen suppression systems — the wet-chemical systems over commercial cooking lines — are serviced semi-annually, every 6 months, under UL-300 and NFPA 17A. It is a separate schedule from the portable extinguishers in the same kitchen, which is exactly where a per-asset schedule earns its keep.
Keep the dates on one record
Because each interval is keyed to the unit and its manufacture date, a building rarely has one due date. Keep a per-serial record that anchors each cycle to the unit and generates the next date for you, then holds the dated proof of the service you performed. You and the authority certify the work; the record is there to prove it happened, not to certify it.
Cadences vary by jurisdiction — verify with your AHJ.
Every asset on its own schedule, automatically
GaugeRoute keys each serialized asset to its type and manufacture date, generates the annual, internal, and hydrostatic dates for you, and keeps the whole route on cadence — the schedule stops being a spreadsheet you rebuild every quarter. Free to start.
Frequently Asked Questions
- How often does a fire extinguisher get professionally serviced?
- Every portable extinguisher gets a full external maintenance once a year, performed by qualified personnel. That is the annual visit that ends in a fresh dated tag. Between those visits, building staff run a quick visual inspection about every 30 days.
- What is the difference between the 6-year and 12-year service?
- The 6-year service is an internal examination of stored-pressure units — the extinguisher is opened, examined inside, and recharged. The 12-year service is a hydrostatic pressure test of the shell. Water, CO2, and wet-chemical units are hydrostatically tested every 5 years instead of 12.
- How often must a commercial kitchen suppression system be serviced?
- Pre-engineered kitchen suppression systems are serviced semi-annually — every 6 months — under UL-300 and NFPA 17A. That is a separate schedule from the portable extinguishers in the same kitchen.
- Do these intervals apply everywhere?
- They are the widely used baseline, but requirements vary by jurisdiction and by the edition your authority has adopted. Verify the exact intervals with your AHJ. GaugeRoute records the inspections you perform; it does not certify them.