Who regulates fire extinguisher service companies in Delaware?

Delaware Office of the State Fire Marshal is the agency the research identified for this trade in Delaware. Requirements and license classes change, so confirm the current rules with them directly.

How do I confirm the exact Delaware requirements before my first job?

Contact Delaware Office of the State Fire Marshal and confirm, in writing, the company license or registration, the technician certification, and any surety bond or insurance filing your scope needs. Requirements vary by jurisdiction — verify with your AHJ (authority having jurisdiction) before you take paid work. This page is a starting point, not legal advice.

If Delaware has no state company license, can I just start?

Not without checking. Even where there is no state license for the trade, you typically still need a business license, sales-tax registration, liability insurance, and possibly a local registration — and the NFPA service standards still govern the work. Verify the full picture locally before you quote a job.

What must a fire extinguisher service tag say in Delaware?

This research pass could not read a Delaware service-tag rule, so this page states none. There is no national tag standard to fall back on and no national colour code: NFPA 10 mandates no tag colour, and the per-state rules that do exist disagree with each other. Ask Delaware Office of the State Fire Marshal what a tag must carry here before you print one.

Individual license

Fire extinguisher service license requirements in Delaware

Updated August 2026

Delaware credentials individual technicians rather than the company for this trade. Confirm the individual license your technicians need with Delaware Office of the State Fire Marshal.

What the research found

State: Delaware (DE)
Regulating agency: Delaware Office of the State Fire Marshal
License / class: Fire Extinguisher License (issued to each individual)
Notes from the source: The State Fire Marshal's licensing sheet places fire-extinguisher licenses under a heading that reads “issued to each individual”, and reserves company licensure to fire-alarm and fire-suppression-system companies with extinguishers carved out. Your technicians hold the credential, not the firm.
Service tag: Verify with the agency

Verify with your AHJ. This is a research-derived starting point, not legal advice. Rules change, and local requirements stack on top of state ones, so the only answer that governs your work is the one you get from Delaware Office of the State Fire Marshal and from your AHJ, the local authority having jurisdiction, before you take a paid job.

Which code edition applies in Delaware

An NFPA standard carries no legal force until a jurisdiction adopts it, and jurisdictions adopt different editions, years apart, with local amendments. So the useful question is never "what does NFPA 10 say". It is "which edition has my authority adopted".

This research pass did not reach an adoption record for Delaware, so this page names no edition. That is a gap in what we could read, never a finding that the state adopts nothing. Ask Delaware Office of the State Fire Marshal which edition of NFPA 10 and which fire code are in force, and ask your authority having jurisdiction the same question, because the two answers are not always the same one.

What a service tag must carry in Delaware

This research pass could not read a Delaware service-tag rule, so this page states none. There is no national tag standard to fall back on: NFPA 10 mandates no tag colour, the popular "the colour tells you the year" rule is a vendor convention rather than law, and the state rules that have been read do not match each other. Ask Delaware Office of the State Fire Marshal what a tag must carry here, in writing, before you print a run of them.

The per-state picture, and why the colour folklore is wrong, is laid out in the state-by-state tag requirements guide and what a fire extinguisher tag colour actually means.

The cadence underneath all of it

Whether or not Delaware licenses this trade, the intervals your customers owe are set somewhere else, and one layer of them is federal. Under OSHA's portable fire extinguisher regulation, an employer subject to OSHA has to have extinguishers visually inspected monthly and put through an annual maintenance check, wherever the building is. The state's adopted edition of NFPA 10 and the local fire marshal stack on top of that floor.

The interval that surprises people is the pressure test, because it is not one number: it depends on the agent and the shell, and a unit on the wrong assumption reads as current for years when it is not. The full picture, with the section of the federal regulation each interval comes from, is in the federal extinguisher intervals guide, and the by-type test schedule is in hydrostatic test intervals by extinguisher type. To put dates against a specific unit, the free cadence lookup takes a manufacture date and an equipment type and returns the next dates due. It is a planning aid, never a verdict on a building.

Sources

Every statement above traces to one of these. Open them and read the current text yourself, because the agency page is the record and this page is only a pointer to it.

Delaware OSFM — Fire Protection System Licensing Information and ReferencesLicensing

Frequently Asked Questions

Do I need a license to service fire extinguishers in Delaware?: Delaware credentials individual technicians rather than the company for this trade. Confirm the individual license your technicians need with Delaware Office of the State Fire Marshal.
Who regulates fire extinguisher service companies in Delaware?: Delaware Office of the State Fire Marshal is the agency the research identified for this trade in Delaware. Requirements and license classes change, so confirm the current rules with them directly.
How do I confirm the exact Delaware requirements before my first job?: Contact Delaware Office of the State Fire Marshal and confirm, in writing, the company license or registration, the technician certification, and any surety bond or insurance filing your scope needs. Requirements vary by jurisdiction — verify with your AHJ (authority having jurisdiction) before you take paid work. This page is a starting point, not legal advice.
If Delaware has no state company license, can I just start?: Not without checking. Even where there is no state license for the trade, you typically still need a business license, sales-tax registration, liability insurance, and possibly a local registration — and the NFPA service standards still govern the work. Verify the full picture locally before you quote a job.
What must a fire extinguisher service tag say in Delaware?: This research pass could not read a Delaware service-tag rule, so this page states none. There is no national tag standard to fall back on and no national colour code: NFPA 10 mandates no tag colour, and the per-state rules that do exist disagree with each other. Ask Delaware Office of the State Fire Marshal what a tag must carry here before you print one.

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