What are the suggested types of outside control valves in order of preference?

What are the suggested types of outside control valves in order of preference?

• A. Manual gate valves, globe valves, ball valves, then check valves.
• B. Electric actuated valves in the basement.
• C. Key-operated valves in random locations.
• D. Listed indicating valves, control valves installed in a cutoff stair tower or valve room, valves located in risers with indicating posts, and key-operated valves.

Answer: (A)

The main idea being tested is how outside control valves should be prioritized based on visibility, accessibility, and the ability to indicate and control them during an emergency. The preferred approach emphasizes locating valves where their status is clearly visible and where fire personnel can reach and operate them reliably. In practice, the recommended order is to use valves that provide clear status indication first, then valves installed in protected and centralized locations, followed by valves placed along risers with indicating posts, and finally valves that are accessible by a key. This sequence makes it easiest to locate, identify, and operate the valve quickly, which is crucial for controlling the standpipe system during a fire. The option that lists valve construction types (manual gate valves, globe valves, ball valves, then check valves) focuses on how the valve is built rather than how it is identified, controlled, or accessed outside the building. While valve type matters for operation and sealing, it does not address the essential elements of outside control valve placement, indication, and secure access emphasized in NFPA 14.

The main idea being tested is how outside control valves should be prioritized based on visibility, accessibility, and the ability to indicate and control them during an emergency. The preferred approach emphasizes locating valves where their status is clearly visible and where fire personnel can reach and operate them reliably.

In practice, the recommended order is to use valves that provide clear status indication first, then valves installed in protected and centralized locations, followed by valves placed along risers with indicating posts, and finally valves that are accessible by a key. This sequence makes it easiest to locate, identify, and operate the valve quickly, which is crucial for controlling the standpipe system during a fire.

The option that lists valve construction types (manual gate valves, globe valves, ball valves, then check valves) focuses on how the valve is built rather than how it is identified, controlled, or accessed outside the building. While valve type matters for operation and sealing, it does not address the essential elements of outside control valve placement, indication, and secure access emphasized in NFPA 14.