Most fires start out small enough to be easily put out with a fire extinguisher. Like any lifesaving equipment, it's critical to ensure that portable fire extinguishers are operable at all times and have people there who are properly trained to operate the extinguishers. As such, it's of maximum importance to understand the different types of fire extinguishers and how to properly maintain them.
Different types of fire extinguishers are suitable for different fire classes. For a fire to exist, it needs the following three elements: fuel, heat and oxygen known as the fire or combustion triangle. Fire extinguishers are designed to eliminate one or more of these elements to put out a fire. That being the case, having the right type of fire extinguisher is critical to protecting lives and assets.
Here’s a breakdown of the different types of extinguishers and the classes of fire they’re suitable for.
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Class of Fire |
Type of Fire Extinguisher to Use |
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Class A: |
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Class B: |
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Class C: |
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Class D: |
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Class K: |
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Note: An ABC fire extinguisher can be used on class A, B, and C fires.
The NFPA 10 requires fire extinguishers to be inspected when they're first installed and visually inspected once a month after that. Any competent person, knowledgeable about extinguishers, can carry out an inspection.
At a minimum, here’s what you should look for:
If any of the above conditions are not met, contact a certified fire extinguisher maintenance company for a thorough inspection. They’ll make repairs and replacements wherever necessary. Plus, it’s advisable to inspect extinguishers more frequently if placed in locations that are more prone to rust, impact, or tampering. And have your extinguishers serviced annually by a reputable fire company.
The annual inspection which is required to be done by a licensed fire suppression contractor should also assess the relative size and suitability of the extinguisher and include a tag on each extinguisher indicating the date of inspection and servicing.
Unlike the monthly visual inspection, fire extinguisher maintenance needs to be performed by a certified person familiar with the requirements of the NFPA 10. Maintenance can be conducted once a year or when indicated by an inspection discrepancy.
Fire extinguisher maintenance typically involves a thorough examination of:
The maintenance procedures are detailed in the manufacturer’s service manual and have to be performed by trained and certified professionals. Brothers Fire & Security Monitoring can assist you with testing, maintaining, and refilling any fire extinguisher. Contact us to figure out the best fire prevention system for your building.
A hydrostatic test involves an internal and external examination of the extinguisher. The extinguisher will be stripped down to its shell and filled with water at a specific pressure for a predetermined time to determine if there’s any leakage or distortion. Afterward, the extinguisher will be drained, dried, and reassembled if it passes the hydrostatic test. If not, the extinguisher must be discarded.The frequency of hydrostatic testing depends on the type of extinguisher you have and can be carried out after 6 or 12 years.
Hydrostatic tests can be dangerous when performed incorrectly and therefore have to be performed by trained, certified professionals equipped with the proper testing devices and facilities.