What valves shall be readily operable from a standing position in the corridor on the same floor they serve?

What valves shall be readily operable from a standing position in the corridor on the same floor they serve?

• A. Isolation valves
• B. In-line shutoff valves
• C. Zone valves
• D. Service valves

Answer: (C)

Zone valves are designed so staff can quickly shut off gas to a specific floor or area from a corridor, without entering rooms. Placed at accessible locations along the floor served, they are operable from a standing position, allowing rapid isolation during emergencies or maintenance. This accessibility supports safety by containing any issue to just that zone and reduces the time needed to secure the area. Other valve types aren’t typically positioned for quick corridor access to isolate an entire zone: isolation valves are usually at the main supply or in equipment rooms, in-line shutoff valves are embedded along runs and not intended for fast, floor-level access, and service valves are for outlet maintenance rather than whole-zone isolation.

Zone valves are designed so staff can quickly shut off gas to a specific floor or area from a corridor, without entering rooms. Placed at accessible locations along the floor served, they are operable from a standing position, allowing rapid isolation during emergencies or maintenance. This accessibility supports safety by containing any issue to just that zone and reduces the time needed to secure the area. Other valve types aren’t typically positioned for quick corridor access to isolate an entire zone: isolation valves are usually at the main supply or in equipment rooms, in-line shutoff valves are embedded along runs and not intended for fast, floor-level access, and service valves are for outlet maintenance rather than whole-zone isolation.