Fire Extinguishers

Hazards

• Contents are under pressure and may explode when combined with other materials.
• Very old fire extinguishers may contain carbon tetrachloride, a known carcinogen.

Handling

• Two most common types include "dry chemical" (sodium bicarbonate or monoammonium phosphate) and carbon dioxide (CO2) both of which are not hazardous.
• To empty contents, discharge outside, away from children or pets. Monoammonium phosphate is an irritant to eyes and the respiratory tract. Wear goggles and particulate mask when discharging extinguisher.

Management Options

• Dry chemical extinguishers
  • May be discharged in an area where an acidic fertilizer would be used such as around evergreens. Do not use on lawns.
  • When relieving the pressure (emptying) the container for disposal, review manufacturers’ instructions, or, if unavailable, use the PASS technique
  • Pull the pin: this unlocks the operating lever and allows you to discharge the extinguisher. Some extinguishers may have other seals or tamper indicators.
  • Aim low: Point the extinguisher nozzle (or hose) at the base of the item.
  • Squeeze the lever above the handle: this discharges the extinguishing agent. Releasing the lever will stop the discharge. (Some extinguishers have a button instead of a lever.)
  • Sweep from side to side.
  • After pressure has been relieved (when nothing else comes out) remove the head from the container and place it with scrap metal or in the trash.
    
• Carbon dioxide extinguishers
  • These extinguishers are refillable and should be refilled after each use. Check Yellow Pages under Fire Extinguishers – Recharging.
  • If the extinguisher becomes defective, drill holes in the cylinder after pressure has been relieved and then place in the trash.
  • Ask fire equipment companies in your area if they will accept used extinguishers (listed in the Yellow Pages).
    
• Very old fire extinguishers
  • Consult fire department.
  • Take to HHW collection or commercial hazardous waste facility.