Join Date: Nov 2010
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Shaking fire extinguishers. Is it too late?
I was told recently that one is supposed to shake fire extinguishers (the usual powder type) once in a while to prevent the powder settling at the bottom and caking. I have a half dozen fire extinguishers on the boat (yes, I am a bit paranoid in this regard), some of them many years old. And yes, all of them show the gauge in the 'green' range (I had one or two that slowly moved out of the green and they were promptly replaced).
So, I took some of them off their brackets and and shook them. I expected to feel some movement in them when I turn them upside down etc but nothing, even with prolonged (a minute or so) shaking.
Is this a problem? Should I feel the powder moving inside? Anything I should do?