Fire Extinguishers
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This four step method known as PASS is used for operating most common fire extinguishers:
P Stands for PULL the pin. This will unlock the operating handle and allow you to discharge the extinguisher.
A Stands for AIM at the base of the fire.
S Stands for SQUEEZE the operating handle. This will discharge the fire fighting agent.
S Stands for SWEEP from side to side. Move carefully in on the fire, aiming at the base, sweep back and forth.