Where should main gas shutoff valves be installed according to NFPA?

The main gas shutoff valves should be installed in locations that are readily accessible for operation. This is crucial for safety, as in the event of a gas leak or emergency situation, quick access to the shutoff valve can prevent potential hazards such as explosions or fires. The National Fire Protection Association (NFPA) guidelines emphasize the importance of accessibility to ensure that trained personnel can respond effectively and promptly to a gas-related incident.

Having shutoff valves that are not easily reachable, such as in inaccessible areas or behind walls, could significantly delay emergency responses, increasing the risk of hazardous situations. Thus, placing the valves in a location that is both convenient and immediately accessible aligns with safety protocols and best practices in gas management, making it the correct response in this context.