What is NFPA 10? The Fire Extinguisher Standard Explained

NFPA 10 is the standard that governs every portable fire extinguisher in the United States. If you own a building, manage a facility, or work as a fire protection contractor, this standard defines what you must do — and how you must do it.

What NFPA 10 covers

NFPA 10 — officially titled "Standard for Portable Fire Extinguishers" — covers five core areas:

1. Selection (§5): Which type of extinguisher is appropriate for which fire hazard. Class A for ordinary combustibles, Class B for flammable liquids, Class C for electrical fires, Class D for combustible metals, Class K for cooking oils.
2. Installation and Placement (§6): Where extinguishers must be located — travel distances, mounting heights, visibility requirements, and cabinet specifications.
3. Inspection (§7): Monthly visual inspections, annual maintenance inspections, and 6-year internal examinations — who performs each, what gets checked, and how results are documented.
4. Hydrostatic Testing (§8): Pressure testing intervals — 5 years for CO2 and wet chemical, 12 years for dry chemical and clean agent. Testing must be performed at DOT-certified facilities.
5. Maintenance and Recharging (§7): When and how extinguishers must be recharged, repaired, or removed from service.

Who created NFPA 10 and why

The National Fire Protection Association (NFPA) publishes NFPA 10 as part of its consensus standards development process. The standard is written by a technical committee of fire protection engineers, manufacturers, insurance representatives, enforcing authorities, and labor representatives. It is revised every 3–5 years through a public comment and review process.

The current edition is NFPA 10 (2022). Most US states have adopted the 2022 edition, though some jurisdictions still enforce the 2018 or 2016 editions. When the standard is updated, the new edition is typically adopted by states within 1–2 years through their fire code adoption cycles.

Who enforces NFPA 10

Local Fire Marshals and AHJs

The Authority Having Jurisdiction (AHJ) — typically your local fire marshal or fire prevention bureau — enforces NFPA 10 during routine fire inspections. They check for current annual tags, proper extinguisher placement, correct extinguisher type for the hazard class, and accessible mounting locations.

OSHA

OSHA 1910.157 requires all employers who provide fire extinguishers to inspect, maintain, and test them — and it defers to NFPA 10 as the recognized standard for how those procedures should be performed. An OSHA inspector will reference NFPA 10 requirements during a workplace safety audit. See our OSHA fire extinguisher requirements guide for full details.

Insurance Carriers

Commercial property insurers commonly require NFPA 10 compliance as a condition of coverage. After a fire loss, the insurance adjuster will review extinguisher inspection records. Missing or expired inspections can result in denied claims, even if the extinguishers were not directly involved in the fire.

How NFPA 10 differs from other NFPA standards

If your building has fire extinguishers (NFPA 10), a sprinkler system (NFPA 25), and a fire alarm (NFPA 72), you're subject to three separate inspection schedules, performed by three potentially different contractors, with three different sets of documentation requirements.

Key NFPA 10 requirements at a glance

• Monthly visual inspection: Every 30 days. Performed by the building owner or staff. Check location, gauge, seal, and physical condition. See our monthly vs annual inspection guide.
• Annual maintenance: Every 12 months. Performed by a certified fire extinguisher technician. Full hands-on inspection with new maintenance tag.
• 6-year internal examination: At the 6-year mark from manufacture for stored-pressure dry chemical extinguishers.
• Hydrostatic testing: Every 5 years (CO2, wet chemical) or 12 years (dry chemical, clean agent). At a certified testing facility.
• Placement: Mounted 4 inches to 5 feet from floor. Along normal paths of travel. Near exits. Unobstructed. See our location and placement guide.

How FireInspected helps you comply with NFPA 10

FireInspected is built directly on NFPA 10 requirements. Our pre-built inspection forms cover every check required by §7.2 (monthly) and §7.3 (annual). Deficiency codes map to NFPA 10 citations. Hydrostatic test dates are tracked automatically. And every inspection generates a professional PDF report with all required documentation — ready for your customer's fire marshal visit, insurance audit, or OSHA inspection.

Explore our complete NFPA 10 guide hub for detailed breakdowns of every requirement.