Fire Extinguisher FAQ

Fire extinguishers require service at four different intervals under NFPA 10 and the Alaska Fire Code:

• Monthly Visual Self-Check (owner or staff): Confirm the unit is in its place, the pressure gauge is in the green zone, the pull pin is intact, and nothing is blocking access. No technician required, takes under a minute per unit.
• Every 12 Months: Annual Certified Inspection: A certified technician performs a full external inspection, applies a dated NFPA 10 tag to each unit, and provides a written compliance report. This is the inspection fire marshals and insurance inspectors look for.
• Every 3 to 6 Years (Most Units): Internal Maintenance: The unit is fully discharged, disassembled, cleaned internally, parts replaced, and recharged. The interval depends on agent and cylinder type: 6 years for stored-pressure dry chemical, halogenated agent, and dry powder units with mild steel, brass, or aluminum shells; 5 years for CO2, wet chemical, stored-pressure water, and dry chemical in stainless steel shells; 3 years for AFFF and FFFP foam; and annually for loaded stream, antifreeze, pump tank, wetting agent, and all cartridge- or cylinder-operated units. Required regardless of how good the unit looks on the outside.
• Every 5 to 12 Years: Hydrostatic Testing: A pressure integrity test of the cylinder itself. Interval depends on extinguisher type, 5 years for CO2, wet chemical, water and foam agents, and dry chemical in stainless steel shells; 12 years for dry chemical in mild steel, brass, or aluminum shells, halogenated agents, and dry powder. Any cylinder that fails is condemned and replaced.

Under the Alaska Fire Code and NFPA 10, annual certified inspections are required for all commercial occupancies, including: restaurants, bars, and food service operations; hotels, lodges, and short-term rental properties operating under a business license; offices, retail spaces, and any property with a Certificate of Occupancy; schools, daycares, and community buildings; healthcare facilities and clinics; multi-unit residential buildings with three or more units; and industrial facilities, canneries, and cold storage. Commercial fishing vessels fall under U.S. Coast Guard rules (46 CFR) instead, which also call for annual inspection. Single-family homes are not legally required but strongly recommended, especially in Sitka where fire department response times can be extended by geography.

The easiest way is to let us track it for you. When we service your property, we record the inspection date, 6-year maintenance due date, and hydrostatic test due date for every unit and contact you before each service interval comes due. You can also check the tags on each unit. The annual tag shows month and year, and the hydrostatic test date is stamped on the cylinder collar. If you are not sure of the history on any of your units, a site visit will sort out exactly where each one stands.

The Sitka Fire Department can issue a Notice of Required Correction, giving you a specific timeframe to bring extinguishers into compliance. Serious violations can result in orders requiring immediate action, and repeated non-compliance can lead to permit holds or occupancy issues. More practically, an expired or missing inspection tag is one of the most commonly cited violations during fire inspections, and one of the easiest to prevent. Many commercial property and liability insurance policies also require fire protection compliance; non-compliance at the time of a claim can be grounds to reduce or deny coverage.

Yes. We are based in Sitka and travel to towns across Southeast Alaska for inspections. Tell us where you are and about how many extinguishers you have, and we will plan a visit. We are also happy to help businesses plan their compliance programs remotely, including reviewing documentation and identifying when service is due.

The annual inspection is a thorough external examination, nothing is discharged or disassembled. A certified technician works through a defined NFPA 10 checklist for each unit on your property:

• Location & Accessibility: Confirm the unit is in its designated place, visible, unobstructed, and reachable within the travel distance required by code.
• Physical Condition: Inspect for dents, corrosion, leaks, and damage. Confirm pull pin and tamper seal are intact and the handle and trigger mechanism are unobstructed.
• Pressure Gauge: Needle must be in the green operating range. A unit reading low or high is flagged for service and cannot be left in place.
• Labels & Rating: Confirm nameplate, operating instructions, and UL rating label are legible. Faded or missing labels are a common code violation during fire marshal inspections.
• Tag & Documentation: A dated NFPA 10 inspection tag is applied to each unit and a written report is provided for your compliance file.

No. The annual inspection must be performed by a certified fire extinguisher technician. The monthly visual check is something you can and should do yourself, but it does not satisfy the annual requirement. Alaska Fire Code and NFPA 10 require the annual inspection to be documented by a qualified person with a dated tag applied. An owner-performed check will not hold up with the fire marshal or an insurance carrier.

If a unit fails, it is either removed from service immediately or flagged for service. Common failure conditions include: gauge out of the green range, tamper seal broken or missing, physical damage to the cylinder or valve, illegible or missing labels, and missing inspection history. We document what was found, service or replace the unit, and provide updated documentation. A failed unit should never be left in service.

Single-family homes are not required by Alaska law to have a certified annual inspection. However, it is strongly recommended, particularly in Sitka where fire department response times can be longer due to geography. If your home insurance policy includes fire protection requirements, check your policy terms. Many insurers now recommend or require extinguishers to be serviced regularly as a condition of coverage.

Yes, it is required. Under NFPA 10, any stored-pressure extinguisher that is on a 12-year hydrostatic test cycle must be emptied and internally examined every six years. In practice that means dry chemical units with mild steel, brass, or aluminum shells, halogenated agent units, and stored-pressure dry powder units. This goes well beyond what the annual inspection covers. The unit is fully discharged, the valve is removed, internal components are examined and cleaned, gaskets and O-rings are replaced, and the unit is recharged with fresh agent and function-tested. The six-year interval is counted from the date of last maintenance or from the manufacture date on a new unit, not from the date of the last inspection.

Six years is not the universal number. CO2, wet chemical, stored-pressure water, and dry chemical in stainless steel shells are on a 5-year internal examination. AFFF and FFFP foam are on 3 years. Loaded stream, antifreeze, pump tank, wetting agent, and every cartridge- or cylinder-operated unit must be examined internally every year.

Because the annual inspection only checks the outside. Inside a dry chemical extinguisher, the agent can cake and compact over time, reducing its effectiveness in a real fire. Valve components and seals degrade even when the unit appears fine externally. The 6-year maintenance requirement exists precisely because external inspections cannot detect these internal changes. A unit that looks perfect on the outside may not discharge properly when it counts.

Hydrostatic testing verifies that the cylinder itself can safely hold pressure. The cylinder is filled with water and pressurized above its rated working pressure. If it shows any permanent deformation, it is condemned and replaced, no exceptions. Required intervals under NFPA 10:

• Dry chemical, mild steel / brass / aluminum shells: Every 12 years
• Dry chemical, stainless steel shells: Every 5 years
• Dry chemical, cartridge- or cylinder-operated: Every 12 years
• CO2 (carbon dioxide): Every 5 years
• Pressurized water, water mist, loaded stream, antifreeze: Every 5 years
• AFFF and FFFP foam: Every 5 years
• Wet chemical (Class K): Every 5 years
• Halon / clean agent: Every 12 years
• Dry powder: Every 12 years

Test pressure is not a single fixed number. Each cylinder is tested to the pressure marked on its own nameplate, and CO2 and other DOT-stamped cylinders are tested under DOT rules.

Yes. Any extinguisher that has been discharged, even partially, must be recharged before it is returned to service. A partially discharged dry chemical unit may still show pressure on the gauge because the propellant gas and extinguishing agent are stored separately. The gauge reading does not tell you how much agent remains. If your extinguisher has been used at all, remove it from service and call us.

It depends on age and type. For units under 6 years old in good condition, recharging is almost always more economical. For units approaching or past the 12-year hydrostatic test interval, replacement is often more cost-effective than paying for the test, recharge, and parts combined. We will always give you a straight assessment on each unit rather than recommend service when replacement makes more sense.

Remove the unit from service and call us if you notice: pressure gauge needle out of the green zone; tamper seal broken or pull pin missing; visible corrosion, dents, or damage; discharge hose cracked, plugged, or missing; the unit has been used or partially discharged; the inspection tag is missing or more than 12 months old; or the unit was exposed to extreme heat, freezing temperatures, or a hard impact. Do not put it back in service.

It depends on what hazards are present in your space:

• ABC dry chemical, the standard for most commercial occupancies. Covers ordinary combustibles, flammable liquids, and energized electrical equipment.
• Class K wet chemical, required in commercial kitchens with cooking appliances using animal or vegetable oils or fats. This is a hard requirement under the Alaska Fire Code for restaurants and food service.
• CO2, server rooms, electrical panels, laboratories, and marine engine rooms where a residue-free agent is needed.
• Class D, combustible metals, used in specific industrial or laboratory settings.

We can assess your space and recommend the correct type, size, and UL rating for each area.

NFPA 10 sets travel distance requirements: the maximum distance anyone should have to travel to reach an extinguisher. For Class A hazards in commercial occupancies, that distance is 75 feet. For Class B hazards, it can be as short as 30 to 50 feet depending on the unit's rated capacity. Units must be mounted at the correct height (handle no higher than 5 feet from the floor), clearly signed, and unobstructed at all times. We handle placement assessment and mounting as part of new unit installation.

Yes. Commercial fishing vessels are subject to U.S. Coast Guard regulations under 46 CFR, which require USCG-approved fire extinguishers in specific locations based on vessel length and fuel type, including the engine room, crew quarters, and enclosed spaces with combustion equipment. USCG-approved units must be Coast Guard rated, properly mounted, and inspected annually. We inspect and service both USCG-rated marine extinguishers and standard commercial units on vessels, and we understand the specific compliance requirements for boats operating out of Sitka.

Yes. Class K wet chemical extinguishers have specific maintenance requirements and must be serviced by a technician familiar with wet chemical agents. Additionally, Alaska Fire Code requires a placard near the Class K unit instructing staff to activate the automatic hood suppression system before using the extinguisher. The two systems work together, and using the extinguisher without activating the hood system first can re-ignite the fire. We verify this placard is in place during every inspection.

No. That is outside our scope. We focus on portable fire extinguisher service. For fire sprinkler system installation, inspection, testing, and maintenance in Southeast Alaska, we refer customers to Panhandle Fire Protection. They are based in the region and have extensive experience with commercial and industrial fire suppression systems. You can reach them at panhandlefireprotection.net. Many properties need both, portable extinguishers handled by us, suppression systems handled by Panhandle.

Sitka follows the Alaska Fire Code, which adopts the International Fire Code (IFC) with Alaska amendments, and references NFPA 10, the National Fire Protection Association standard for portable fire extinguishers, as the technical standard for inspection, maintenance, and testing intervals. The Sitka Fire Department enforces these requirements locally. For marine vessels operating out of Sitka, U.S. Coast Guard regulations under 46 CFR also apply and require USCG-approved extinguishers in specific locations.

During a fire safety inspection, Sitka Fire Department inspectors verify: that fire extinguishers are present in required locations; that each unit has a current annual inspection tag (dated within the last 12 months); that units are properly mounted at the correct height and unobstructed; that labels and UL ratings are legible; and that Class K extinguishers in kitchens have the required placard directing staff to activate the hood suppression system first. A missing or expired inspection tag is one of the most common citation points for commercial properties in Sitka.

The Alaska State Fire Marshal's Office sets and enforces fire protection standards statewide through the Alaska Fire Code. For fire extinguishers, this means compliance with NFPA 10 requirements for annual inspections, 6-year internal maintenance, and hydrostatic testing at the correct intervals. The Fire Marshal's Office conducts inspections of higher-risk occupancies and investigates fires. Local fire departments like Sitka's enforce day-to-day compliance. Staying current on your extinguisher service schedule is what keeps you compliant at both levels.

Many commercial and property insurers include fire protection compliance as a condition of coverage. Some policies require annual certified inspections as a minimum; others specify compliance with NFPA 10 broadly. At the time of a fire claim, insurers may review your compliance documentation. If extinguishers were out of service or uninspected, it can be used to reduce or deny coverage. The simplest protection is a current inspection tag on every unit and a written report in your file. We provide both.

Every service visit we perform includes written documentation, inspection reports listing each unit, its condition, tag date, and any service performed. We recommend keeping this in a binder on-site where an inspector can easily review it. If you need documentation for a past service visit, contact us and we can provide copies. If you are not sure whether your current documentation is complete, a site visit will inventory every unit and get your records current.

Start with a site assessment. We will walk the property, identify every extinguisher, check the tag history and condition on each unit, and tell you exactly where you stand on annual inspections, 6-year maintenance, and hydrostatic testing. We will also identify any gaps, spaces that require an extinguisher but do not have one, units that are the wrong type for the hazard class, and mounting or placement issues. After the assessment you will have a clear picture and a plan to get compliant before your first fire department inspection.