How High Is Too High? The Fire Extinguisher Rule That Gets Missed
Mounting your extinguisher just a few inches too high could result in a survey tag. Here's what NFPA 10 actually says.
When was the last time you measured the height of your fire extinguishers?
If you’re relying on eyeballing it, you might be setting your facility up for a tag. One of the most overlooked and easy to fix deficiencies during a Life Safety survey is incorrect fire extinguisher mounting height.
Let’s break down what NFPA 10 (2010 Edition) actually requires. This is the edition CMS references.
Fire Extinguisher Installation Height Requirements (NFPA 10 6.1.3.8)
Fire extinguishers 40 pounds or less (gross weight):
The top of the extinguisher cannot be more than 5 feet (60 inches) above the floor.
Fire extinguishers over 40 pounds (gross weight):
The top of the extinguisher must be no higher than 3.5 feet (42 inches) from the floor.
This includes larger ABC extinguishers and some K Class models.
Bottom clearance for all hand portable extinguishers:
Must be at least 4 inches off the floor.
Why It Matters
Improper mounting isn’t just a minor oversight. It’s a potential barrier during an emergency. If a staff member can’t easily grab the extinguisher in a fire, seconds can be lost. These height rules ensure safe, accessible, and compliant fire protection.
Quick Tips for Your Team
· Use a tape measure not a guess
· Measure from the floor to the top handle not the bracket
· Document compliance during monthly extinguisher checks
Don’t forget about those heavier extinguishers in kitchens, mechanical rooms, and outdoors
Takeaway:
Check the height. Fix the mount. Document the results.
Because in Life Safety, the little things can become big problems.
Bonus for Paid Members: How to Audit Mounting Heights Efficiently
Don’t just measure—document. During a CMS or Joint Commission survey, it’s not enough to say the extinguishers are mounted correctly. Surveyors are looking for evidence of routine checks and proactive maintenance.
Here’s how to stay ahead: