Gas Fitter Practice Test 2025 – The All-in-One Guide to Mastering Your Certification!

When a relief valve is leaking, the appropriate action is to replace the relief valve and check for the cause of the activation. Relief valves are critical safety devices designed to release excess pressure to prevent system failures or explosions. If a relief valve is leaking, it could indicate that the valve is not functioning correctly, potentially due to damage, wear, or a malfunction.

Replacing the valve ensures that the system is restored to a safe operating condition, as a malfunctioning valve can lead to dangerous pressure build-up. Moreover, investigating the cause of the valve's activation is necessary to address any underlying issues, such as excessive pressure in the system, improper installation, or system design flaws that may have contributed to the valve opening unnecessarily.

The action of simply trying to clean the valve or replace just the valve seat might not effectively address the problem, as these actions do not resolve the potential root cause of the issue. Furthermore, relieving tank pressure by opening a tap, while it may alleviate immediate pressure, does not address the need for a functional and safe relief valve, nor does it prevent reoccurrence of the issue. Therefore, replacing the valve and examining the activation cause is the most comprehensive approach to restore safety and functionality.