General safety precautions must be followed when maintaining fire extinguishers. Residual pressure must be released slowly to avoid injury. Do not fully unscrew parts until pressure is fully released. Never attempt to remove valves from pressurized extinguishers. Regular inspection and maintenance is needed to ensure extinguishers are in proper working condition and safe for use. Extinguishers showing corrosion, damage, or deterioration of pressure-bearing parts must be removed from service. Annual inspections include checking components and pressure tests to identify any repairs or replacements needed.