Things You Should Know About Fire Extinguishers


What Type of Portable Fire Extinguisher Should I Buy?

Size
The best fire extinguisher is one that you can safely use that extinguishes the fire. We recommend a dry chemical extinguisher filled with a minimum of 2-1/2 pounds of powder. A very small fire extinguisher may run out before you've fully extinguished the fire. Don't cut corners to save three or four dollars. You should consider purchasing a 4-1/2 pound extinguisher for longer extinguishing capability. We don't recommend extinguishers larger than 4-1/2 pounds for home use. Remember that a fire extinguisher needs to be easy to use by all members of the family. A fire extinguisher that is to heavy will be difficult to use.

Rating
We recommend that you purchase 1A 10BC or 1A 20BC rated extinguishers for your home, car and boat. These kinds of extinguishers are often referred to as multipurpose or household fire extinguishers. Extinguishers with all three ("A", "B" and "C") ratings are the most versatile because they are effective on ordinary combustibles such as wood, paper, plastics as well as on oil, grease, and electrical fires. Dry chemical extinguishing agents are safe for use on household electrical fires because dry chemical powder does not conduct electricity. These dry chemical extinguishers typically contain monoammonium phosphate, a powder that has properties similar to baking soda. The dry chemical powder residue acts to prevent fire re-ignition, and vacuuming or wiping with a damp cloth can clean it up.

Some extinguishers are sold specifically for use in cars and boats. These extinguishers are similar to the household extinguishers described above, but they often lack the "A" rating. This signifies that they are not effective on wood, paper, cloth and other common combustibles.

UL Listing or FM Approval
This is your assurance that your new fire extinguisher meets minimum performance requirements and was manufactured using materials and processes that will provide a suitable degree of reliability.

A Pressure Gauge
Some extinguishers don't have a pressure gauge. They have a pressure-indicating button. A gauge is generally more accurate and more easily understood.

Cost
Be prepared to spend $15 to $20 dollars. Many fire extinguishers go on sale during fire prevention week. Look for value.

Ten years is a reasonable time to replace older extinguishers. Plastic parts can deteriorate or break over time.

What About Gaseous Fire Extinguishing Agents? Aren't They New and Better?
Some fire extinguishers contain liquefied gases, such as carbon dioxide or halogenated hydrocarbons. These agents serve special purposes. We do not recommend them for home or auto use. Gases are best used in enclosed equipment such as electrical switchgear. Also, using gasses requires additional training.


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Last updated March 16, 2006