What is Hydrostatic Testing for Fire Extinguishers?

If you own a CO2, water, or a Class K fire extinguisher…this blog post is for you.

When it comes to ensuring the safety and functionality of a CO2, water, or Class K fire extinguisher, hydrostatic testing is performed to ensure the fire extinguishers cylinder can hold the pressure needed to function properly when called into action.

Why a Fire Extinguisher Might Fail a Hydrostatic Test

There are several reasons that a fire extinguisher might not pass a hydrostatic test. Some of those reasons include internal or external corrosion, and damage or wear and tear from use.

How Often Should You Test?

Depending on the type of fire extinguisher you have, OHSA recommends 5 or 12 year as reference in the below chart.

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