How often should you inspect a fire extinguisher?
Updated July 2026
Eyeball every fire extinguisher's gauge and pin once a month, book a professional service once a year, and plan to recharge or replace the unit every 6 to 12 years. The monthly look takes 30 seconds: needle in the green, pin seated, seal intact, no rust or dents. That habit matters because an extinguisher fails quietly. It slowly bleeds pressure, and the dry chemical inside settles and cakes if the bottle never moves, so the one moment you reach for it in a kitchen fire is the worst time to learn it is dead.
What changes the interval
| Your situation | Interval | Why |
|---|---|---|
| Monthly owner check | Every month | Gauge in the green, pin and tamper seal intact, no corrosion or blocked nozzle |
| Professional inspection and service | Once a year | A certified tech verifies pressure and internals and tags it (NFPA 10) |
| Any discharge, even a one-second burst | Recharge immediately | A partial use drops the pressure; a rechargeable unit costs $15–40 to refill |
| Rechargeable dry-chemical (ABC) | Recharge every 6 years | Powder packs down over time; a recharge restores a clean discharge |
| Steel cylinder integrity | Hydrostatic test at 12 years | The bottle itself is pressure-rated; many disposables are simply replaced |
| Disposable, non-rechargeable unit | Replace at 12 years or if the gauge drops | A plastic-valve unit has no recharge path; a new 5 lb ABC is $25–60 |
| Kitchen or garage extinguisher | Check monthly, wipe grease | Grease film and heat age the valve and gauge faster than in a hallway |
The cost of skipping it
What skipping it costs: cooking is the leading cause of home fires in the US, and a small stovetop flare is exactly the fire a $25–60 extinguisher is meant to knock down in seconds. A depressurized or caked unit does nothing, and by the time you sprint to a second one the fire has spread from a $200 cleanup to a gutted kitchen and thousands in smoke and structural damage. The monthly check is free, an annual service tag is $15–40, and either is trivial next to a fire that outran the extinguisher.
How to do it (2 minutes monthly · DIY)
- Confirm the pressure needle sits in the green "charged" band, not in the red on either side.
- Check the pull pin is fully seated and the plastic tamper seal is unbroken.
- Scan the cylinder for dents, rust, or corrosion, and the hose and nozzle for cracks, clogs, or old grease.
- Wipe the unit clean, especially a kitchen extinguisher that collects cooking film.
- For dry-chemical units, gently rock or invert the bottle a few times to loosen powder that has settled on the bottom.
- Confirm it is mounted where you can grab it in one motion, near an exit and not buried behind the trash can.
Knowing the interval is the easy half. OnOtto reminds you at the right interval, and it won't let you snooze it into next year. Tasks persist until they're done, and completing fire extinguisher checks schedules the next one automatically.
Put this on autopilot, free for 30 daysFrequently asked questions
Do you recharge a home fire extinguisher or replace it?
It depends on the valve. A rechargeable unit with a metal head can be refilled at a fire-equipment shop for $15–40, which is worth it once it has been used or the gauge leaves the green. The cheap big-box extinguishers with a plastic valve cannot be recharged; you replace them, and a new 5 lb ABC runs $25–60. Either way, once a unit has discharged even briefly or lost pressure, it is out of service until it is refilled or swapped.
How many fire extinguishers should a house have, and where?
A common guideline is at least one on every floor, plus dedicated units in the kitchen and garage or workshop. Mount the kitchen one within easy reach but away from the stove itself, so a range fire never blocks you from it. A standard home ABC extinguisher covers most household fires; some people add a smaller grease-rated unit by the cooktop. Spreading three or four units around beats owning one heavy extinguisher two rooms away.
What do the A, B, and C ratings mean?
They mark the fire classes a unit can handle: A is ordinary combustibles like wood and paper, B is flammable liquids like grease and gasoline, and C is energized electrical equipment. A home ABC extinguisher covers all three, which is why it is the default choice. Commercial kitchens add class K for deep-fryer oils. Match the rating to the risk: a garage with fuel and a running engine wants B and C coverage, not just A.
Does a fire extinguisher expire if it is never used?
Effectively, yes. Even a never-fired extinguisher can slowly lose pressure through the valve, and the dry chemical settles into a hard cake that will not spray evenly. That is why the schedule pairs a monthly pressure check with a 6-year recharge on rechargeable units and a 12-year replacement or hydrostatic test on the cylinder. If the gauge has drifted out of the green or the bottle is well past a decade, treat it as unreliable and service or replace it.