Where should the service tag be attached after servicing a fire extinguisher?

The service tag should be attached to the portable or fixed system for inspection after servicing a fire extinguisher. This practice is crucial because it provides immediate visibility of the extinguisher's maintenance status to anyone who may need to use it. By affixing the tag directly to the equipment, it communicates important information such as the last service date, the technician who serviced it, and any issues or recommendations for the unit.

Choosing this option ensures compliance with safety regulations and helps maintain accountability for fire safety equipment. It's essential for users to know that the extinguisher has been inspected and is ready for use, thereby contributing to overall fire safety in the given environment. Other locations, like a wall, a service vehicle, or a clipboard, do not provide the same level of immediate awareness and accessibility for users needing to gauge the operational status of the fire extinguisher.