What does "emptying" refer to in fire extinguisher terminology?

In fire extinguisher terminology, "emptying" refers to removing all contents of the extinguisher. This process typically involves discharging the extinguishing agent completely, which is crucial for maintenance purposes or when the extinguisher has been used in an emergency.

Maintaining a fire extinguisher involves ensuring that it is fully operational and ready for use at all times, which may require emptying the extinguisher to inspect its internal components, refill it with the appropriate agents, or replace it if damaged. This action is essential for ensuring the effectiveness and reliability of the fire extinguisher in the event of a fire emergency.

The other options describe different procedures related to fire extinguishers, such as filling and testing, but they do not specifically connect to the concept of "emptying" as it is commonly understood in this context.