What type of test must be performed after recharging a stored pressure extinguisher?

After recharging a stored pressure extinguisher, a leak test must be performed to ensure that the extinguisher is functioning properly and that there are no leaks in the system. This type of testing is critical because, during the recharging process, components of the extinguisher may have been disturbed, which could potentially lead to leaks. By conducting a leak test, the technician can verify the integrity of the extinguisher's seals and connections, ensuring that it will function effectively in case of a fire emergency.

This test typically involves checking for any audible sounds of escaping gas or using specialized leak detection solutions that create bubbles at any points where refrigerant or gas could be escaping. This ensures that the extinguisher is safe for use after maintenance has been completed, providing confidence that it will perform as expected during use.

Other types of tests, such as a flow test, pressure test, or visual inspection, while important in different contexts of extinguisher maintenance, do not specifically address the immediate concerns related to leaks that could occur after recharging. Therefore, prioritizing a leak test allows for the appropriate focus on the operational readiness and safety of the extinguisher post-maintenance.