What is the best way to properly close a service valve on a propane tank?

The best way to properly close a service valve on a propane tank is to tighten it with your hand. This method ensures that the valve is closed securely without the risk of damage that can occur from using excessive force or tools. Hand-tightening allows the user to feel the resistance of the valve and avoid over-tightening, which could lead to leaks or damage to the valve's components.

Using tools like a hammer or attempting to force it closed can result in stripping the valve threads or causing other mechanical failures. Allowing the valve to close naturally is not advisable as it could leave the valve not fully closed or secure, which is not safe for propane containment.

Thus, hand-tightening represents a balanced approach that prioritizes safety and functionality when handling propane service valves.