What type of extinguishers should be disassembled on an annual basis for maintenance?

Loaded stream charge extinguishers require annual disassembly for maintenance due to the specific design and components involved in their operation. These extinguishers utilize a pressurized water or foam agent, and regular maintenance is crucial to ensure that the internal mechanisms, such as the valve and nozzle, are free from blockages and function properly. Disassembling these extinguishers allows technicians to inspect gaskets and seals, check for wear and tear, and ensure that the extinguishing agent is correctly pressurized and effective.

The maintenance protocols for loaded stream charge extinguishers are more rigorous compared to other types, such as K Class extinguishers, which typically have their systems checked more for chemical residue and less for internal mechanical components. Pump tank extinguishers and cylinder operated extinguishers also have different maintenance requirements that often do not necessitate annual disassembly. For example, pump tank extinguishers primarily rely on the operator to maintain the pump mechanism without needing constant internal inspections, while cylinder operated extinguishers usually have maintenance tasks focused on external checks and pressure monitoring rather than complete disassembly.