Where must a thermally operated valve be installed when inside tanks are placed in a separate room?

The correct installation location for a thermally operated valve when inside tanks are placed in a separate room is where the line enters the room. This is because the thermally operated valve is designed to provide a critical safety function by preventing the flow of fuel in case of overheating or a fire condition. Placing it at the point where the line enters the room ensures that any fuel supply to the room is shut off before it can reach any heat source or ignition point, effectively providing an additional layer of safety.

By having the valve situated at this entry point, it also facilitates easy access for maintenance, while still observing safety protocols. This placement aligns with code compliance and best practices to minimize risks associated with fuel appliances located in different areas.