Activate the building fire alarm, or send someone else to do it. Only after the fire alarm is sounding should you consider using a fire extinguisher. If none of these factors come into play, you must act quickly in order to be successful in extinguishing the fire, while minimizing your own risk. Use the extinguisher to put out the fire. How to Use an Extinguisher Make sure you are standing at least six feet from the fire, and keep your EXIT at your back.
P Pull the pin of the extinguisher.
This pin normally prevents accidental discharge, and its removal unlocks the trigger mechanism. Don't squeeze the lever as you remove the pin, but hold the extinguisher by the lower handle only. A Aim the nozzle of the extinguisher at the BASE of the fire. This is where the fuel is actually burning. S Squeeze the handle lever.