Since CO2 extinguishers don’t have a pressure gauge, how do I know if it is under-pressurized?
The carbon dioxide in the extinguisher is in a liquid state and remains a liquid because of the pressure it is under, a pressure that it self-creates as it tries to turn into a gaseous state. Even if there were half of the amount of carbon dioxide in an extinguisher as there should be, it would still create the same amount of pressure in the cylinder. It is for this reason that CO2 extinguishers are checked for proper weight during the monthly inspection. Refer to the nameplate label for proper fill weight.
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- Since CO2 extinguishers don’t have a pressure gauge, how do I know if it is under-pressurized?
