Q&A for How to Refill a Fire Extinguisher

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After refilling a fire extinguisher with powder, how do I pressurize it?

Upnorth Here

Top Answerer

Take it to a professional. Unless it is a water-filled extinguisher with air pressure, it's unlikely you will have the necessary inert gas and equipment to re-pressurize any fire extinguisher. Many use nitrogen gas. Some use carbon dioxide cylinders (usually in commercial or industrial use).

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Question

This "how-to" article is telling me to take my extinguisher to a technician?

Upnorth Here

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Yes, unless the extinguisher is water-based and uses air pressure (e.g., from an air compressor), it is generally impossible for an ordinary person without special equipment and training to repressurize an extinguisher safely. Get a new one or have it professionally refilled.

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Question

What is the ratio of water and foam in a concentrated 9 ltr foam extinguisher?

Community Answer

The ratio in this instance is 1:2 water and foam.

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Can I take my fire extinguisher to my local fire department of to have it inspected and refilled?

Upnorth Here

Top Answerer

You would need to ask them first. Many departments are no longer equipped or staffed for handling refills of anything other than water-based extinguishers (air-pressurized water, or APW). There may also be "municipal liability" if they do it improperly.

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Question

What can you use to pressurize a fire extinguisher with air?

Maura Behan

Community Answer

You typically use a hand pump or a compressed air source. Hand pumps are manual devices that you pump to pressurize the extinguisher. Compressed air sources can include nitrogen cylinders or air compressors equipped with the appropriate fittings to connect to an extinguisher's valve. These methods ensure the extinguisher is properly pressurized and ready for use in case of fire.

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