The correct order to use a fire extinguisher is summarized by the acronym PASS:
- Pull the pin. This unlocks the operating lever and breaks the tamper seal.
- Aim the nozzle or hose at the base of the fire.
- Squeeze the handle or lever to discharge the extinguishing agent.
- Sweep the nozzle or hose from side to side across the base of the fire until it is extinguished.
This sequence ensures that the extinguisher is operated effectively and safely to put out the fire from its source rather than just the flames.