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I don’t use permanently pressurized fire extinguishers anymore, as they are hard to maintain and rarely reach a life span of 20 years.
Make sure to check at least once every 3 years if the pressure is still in the green. If not, replace it immediately.
Can they be repressurized at all with a regular pump? Or is it something more in depth than that
If you look at the gauge, you can see that the ideal pressure is 1344 kPa or 13.44 bar. If you own a pump capable of using at least 14 bar, you are good to go.
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