Fire extinguishers are one of the essential safety devices for a building. These are mainly used to suppress small fires by preventing them from breaking out. Extinguisher agents like water, carbon dioxide, dry chemical powder, and foam are used to suppress fire.
After multiple uses, the extinguisher agents diminished, and as a result, it’s possible that the pressure inside the cylinder decreased as well, which would explain why the fire wasn’t effectively put out. Thus, it becomes necessary to refill or pressurise the extinguisher agents in order to recharge the fire extinguisher. It will be restored to its ideal state and prepared for usage in a fire emergency once more after being recharged. The NFPA recommends that the recharging of fire extinguishers be done every seven years, depending on the type.