Where should a manual gas cock valve shutoff be installed?

A manual gas cock valve shutoff is required to be installed external to the furnace to ensure safety and accessibility. This placement allows for quick and easy access to shut off the gas supply in the event of a malfunction, leak, or emergency situation. Having the valve located outside of the furnace minimizes potential hazards, as it provides a clear, unobstructed means of shutting off the gas without needing to access the interior of the furnace, which could be unsafe or cumbersome, particularly if there are issues with the appliance.

While shutoff valves may also be located at the gas meter or near the burner in some contexts, the preference for situating the valve external to the furnace is crucial for operational safety and code compliance. It enables users or emergency responders to safely isolate the gas supply without risking exposure to gas leaks that could occur within the furnace itself.