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Glossary

Annual maintenance (portable extinguishers)

The once-a-year hands-on service check on each portable extinguisher, done by a trained tech, with the date recorded on the tag.

Annual maintenance is the once-a-year, hands-on service check of each portable fire extinguisher, done by a trained person, with the date recorded on the tag.

It is separate from the monthly visual inspection and does not replace it. OSHA calls it a maintenance check, NFPA 10 calls it maintenance, and techs call it the annual. The unit comes off the wall and gets examined part by part: mechanical condition, agent, expelling means, hose, pin, seal, and the hydro date. Stored pressure units are not opened up at the annual; internal examination runs on its own longer clock.

Where it comes from

For workplaces, 29 CFR 1910.157(e)(3): the employer must put every portable extinguisher through an annual maintenance check, record the date, and keep that record for one year after the last entry or the life of the shell, whichever is less. Paragraph (e)(1) puts responsibility for inspection, maintenance, and testing squarely on the employer, and (e)(3) states outright that stored pressure extinguishers do not require an internal examination at the annual.

On the fire code side, NFPA 10, Standard for Portable Fire Extinguishers, sets the same one-year maintenance interval in Section 7.3 of the 2022 edition, and most state and local fire codes adopt NFPA 10 by reference. Two related clocks live in the same OSHA rule: 1910.157(e)(4) requires stored pressure dry chemical units on a 12-year hydrostatic schedule to be emptied and put through full maintenance every 6 years, and 1910.157(f) sets hydrostatic test intervals by extinguisher type.

On the job

The annual is a service event. A tech takes each extinguisher down, checks the gauge, weighs or hefts the unit, examines the shell and hardware, verifies the hydro date, fixes what is wrong, and hangs a new dated tag. OSHA 1910.157(e)(5) requires alternate equivalent protection while units are out for service, which is why service companies swap in loaners instead of leaving empty brackets.

The tag is the evidence either way. A compliance officer, a fire marshal, and an insurance auditor all read the same two things: monthly initials on the back, an annual service date on the front. Initials with no service date is the classic miss, and it is exactly what an inspector is trained to spot. A serious OSHA citation runs up to $16,550 per violation at 2026 penalty levels, and one building can hold dozens of extinguishers.

For a fire protection contractor, extinguisher annuals are route work: recurring, per-unit, and scheduled off the recorded date. They sit on the same ITM calendar as sprinkler and alarm work, and a missed anniversary is both lost revenue and a customer sitting exposed.

Annual maintenance (portable extinguishers) versus Monthly visual inspection

The monthly visual inspection is a look. Annual maintenance is a service. The monthly asks whether the extinguisher is where it belongs, visible, accessible, charged, and undamaged. The annual takes the unit down and proves it will actually work.

Monthly visual inspection
A glance, in place. The owner's own staff, no tools, initials and date on the tag. Required by 1910.157(e)(2).
Annual maintenance
A hands-on service event. A trained tech, usually from a licensed company, with the date recorded and a new tag. Required by 1910.157(e)(3).

On the tag, the difference is initials versus a date. Twelve months of initials with no service date reads as a site that did the free half of the rule and skipped the paid half.

Where it varies

OSHA does not require a license to perform the annual, only that it happen, be done right, and be recorded. Most state fire marshals go further and license extinguisher servicing companies and their technicians, with the license or certificate number required on the service tag. So whether in-house staff can legally do the annual depends on the state, and who counts as qualified personnel is a state question. The monthly inspection is in-house everywhere.

Worked example

A distribution warehouse outside Little Rock runs 46 extinguishers, and the facilities lead has initialed every tag on the first Monday of each month for three years. No service company has touched the units since install, so the tags carry thirty-six sets of initials and no maintenance date. To an OSHA compliance officer that is a 1910.157(e)(3) violation on every unit, citable as serious at up to $16,550, over a condition a one-day service visit would have cured.

Sources

  1. OSHA requires an annual maintenance check on portable extinguishers, with the date recorded and the record kept one year after the last entry or the life of the shell, whichever is less. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(3) via osha.gov).
    “record the annual maintenance date and retain this record for one year after the last entry or the life of the shell”
  2. The monthly visual inspection is a separate OSHA requirement from annual maintenance. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(2) via osha.gov).
    “shall be visually inspected monthly”
  3. The employer, not the servicing company, holds responsibility for extinguisher inspection, maintenance, and testing. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(1) via osha.gov).
    “The employer shall be responsible for the inspection, maintenance and testing of all portable fire extinguishers in the workplace”
  4. Stored pressure extinguishers are not opened for internal examination at the annual. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(3) via osha.gov).
    “Stored pressure extinguishers do not require an internal examination.”
  5. Stored pressure dry chemical extinguishers on a 12-year hydrostatic schedule must be emptied and put through full maintenance every 6 years. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(4) via osha.gov).
    “emptied and subjected to applicable maintenance procedures every 6 years”
  6. Alternate equivalent protection is required while extinguishers are removed from service for maintenance and recharging. 1910.157 - Portable fire extinguishers | Occupational Safety and Health Administration (OSHA 29 CFR 1910.157(e)(5) via osha.gov).
    “alternate equivalent protection is provided when portable fire extinguishers are removed from service”
  7. A serious OSHA violation carries a maximum penalty of $16,550 per violation at 2026 penalty levels. OSHA Penalties | Occupational Safety and Health Administration (OSHA penalties page via osha.gov).
    “$16,550 per violation”

Related terms

  • ITM (inspection, testing, and maintenance). ITM is the whole program: inspecting the system, testing it to prove it works, and maintaining it so it keeps working, each on its own schedule.
  • Qualified personnel. Somebody the AHJ will actually accept as competent to inspect, test, or maintain the system, usually proven by a state license or a NICET card.
  • Violation. The fire marshal wrote it up: a formal citation under the adopted fire code, with a deadline to correct and penalties behind it.
  • Functional test. A functional test makes the device actually operate and proves the signal landed. If nobody flowed water or tripped anything, it was just a look.

Verified August 7, 2026 against the sources above. Adopted editions and local amendments vary; your authority having jurisdiction has the final word. Nothing here is legal advice.