I bought this too replace my old fire extinguisher on my boat, which was still good. They are very dependable. hopefully never needed, too make sure they are dependable every Spring I turn the fire extinguisher upside down and tap it with a rubber mallet or rubber hammer, too loosen the dry powder on the bottom of can, then I shake the fire extinguisher too feel the powder move around, and check the gauge, make sure it is in the green. It is coast guard approved.
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