What component should be recovered and reused from a loaded stream charge?

The stream agent inside a loaded fire extinguisher is the component that should be recovered and reused. This is because the stream agent is the active substance responsible for putting out fires; therefore, its proper handling and reuse is crucial in maintaining efficiency when the extinguisher is recharged or refilled. Recovery of the stream agent can also support environmental sustainability practices, as it minimizes waste and allows for more effective management of fire suppression resources.

The other components mentioned, such as the extinguisher itself, the outer casing, and the pressure gauge, do not typically serve the same purpose as the stream agent. While these components are important for the overall functionality and safety of the extinguisher, they are not interchangeable or reusable in the context of fire suppression material once the extinguisher has been deployed. The focus on the stream agent emphasizes the core purpose of fire extinguishers, which is to provide an effective means of firefighting through the specific suppression agents designed for different fire classes.