What are the manual shutoff valve requirements to an appliance connected to a piping system?

The correct answer highlights the importance of specific shutoff valve requirements in ensuring safety and compliance in liquefied petroleum gas (LPG) installations. According to NFPA 58, appliances connected to a piping system must have a manual shutoff valve designed to be non-displaceable. This means that the valve should be installed in such a way that it is not moved or displaced by movement of the appliance. This design prevents accidental disconnection of gas service.

Additionally, the requirement specifies the inclusion of a listed convenience outlet. This is essential for easy access to the gas supply for maintenance or emergency shutoff, ensuring that the user can quickly and safely interrupt the gas flow if needed.

By combining a non-displaceable valve with a listed convenience outlet, safety is significantly enhanced. This setup ensures reliable operation and helps prevent gas leaks that could occur from accidental disconnections or misoperation of equipment, which is critical in systems utilizing liquefied petroleum gas.