How to use AFFF Foam Fire Extinguishers

  1. Before attempting to fight a fire with a fire extinguisher it is important to check that it is fully charged (Fig. 1) and that the safety pin is not bent (Fig. 2).
  2. Ensure you remain a safe distance from the fire and remove the safety pin (Fig. 3) this will break the tamper seal.
  3. Where to aim the fire extinguisher hose:
    • Flammable liquids: Aim the hose at a vertical surface near the fire, do not spray directly at the fire as this could cause the fire to be pushed and spread to surrounding areas. Foam extinguishers allow a build up of foam across the surface of the fire causing it to be smothered.
    • Solid combustibles: Aim the hose at the base of the fire, moving across the area of the fire.
  4. Squeeze the lever slowly to begin discharging the extinguisher, as the fire starts to diminish carefully move closer to it.
  5. Ensure all the fire has been extinguished, the foam creates a blanket over the fire and helps to prevent re-ignitions.