What must be returned to the owner when servicing a fire extinguisher?

When servicing a fire extinguisher, it is essential to return all replaced parts to the owner. This practice ensures transparency and allows the owner to verify that proper maintenance has been carried out. By providing the replaced parts, the technician demonstrates the authenticity of the service and informs the owner about what components were deemed necessary for replacement, supporting confidence in the servicing process. Additionally, returning all replaced parts aids the owner in understanding the history of the fire extinguisher, which could be important for both safety protocols and regulatory compliance.

While some options, like returning only defective parts or non-functional units, may seem viable, they do not offer a complete overview of what was performed during the servicing. Returning only specific components limits the owner's knowledge of what was changed and could potentially overlook other necessary repairs. Similarly, while recyclable components may also be part of the service process, not all replaced parts are recyclable, and not returning the entirety of the replaced components does not fulfill the comprehensive service standard.