What should be the first action when the relief valve on a propane container is leaking?

When the relief valve on a propane container is leaking, the first action should involve shutting off the fuel. This is crucial because it helps to prevent further gas from escaping and minimizes the potential for a dangerous situation, such as a gas accumulation that could lead to fire or explosion. By stopping the flow of gas, you reduce immediate risks and create a safer environment to handle the situation.

Ensuring safety in a scenario like this takes priority over other actions, such as calling a gas company or notifying residents, which may be necessary afterward but do not address the immediate hazard posed by the leaking valve. Repairing the valve immediately could expose a technician or others to significant risks if the gas continues to flow. Consequently, the most appropriate and effective first action is to shut off the fuel supply to the container, thereby controlling the situation right from the start.