Fire Extinguisher 44
Fire Extinguisher 44 : Maintenance: Internal Maintenance: (2) Water: Annually (some states) or 5 years (NFPA 10, 2010 edition); Foam - every 3 years; Wet chemical & CO2 - every 5 years; Dry chemical and dry powder- every 6 years; Halon and clean agents - every 6 years; Cartridge operated dry chemical or dry powder - annually; Stored pressure dry chemical mounted on vehicles - annually. The extinguisher is emptied of its chemical and pressure to check for proper operation. All components are disassembled, inspected, cleaned, lubricated, or replaced if defective. Liquid agents are replaced at this time, dry agents may be re-used if in good condition, halon is recovered and re-used, but CO2 is discharged into the atmosphere. The extinguisher is then re-filled and recharged, after a "verification of service" collar is placed around the cylinder neck. It is impossible to properly install or remove a collar without depressurizing the extinguisher. Note: Cartridge-operated extinguishers should be visually examined, but do not require a verification of service collar
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