In a standpipe system, where should the dry pipe valve be located?

• A. In the building's attic
• B. Near the main entry
• C. At the plant room
• D. All of the above

Answer: (D)

The important idea is that the dry pipe valve is a control device whose location is driven by practicality and the building layout, not a single fixed spot. It must be in a protected, accessible space so maintenance staff and firefighters can reach it, and it should be placed where it can reliably feed water into the dry-pipe system without being exposed to freezing or damage.

Because NFPA 14 allows flexibility in where the valve chamber is installed, the valve can be located in a plant or mechanical room near the water supply, or in other protected areas of the building. If a heated attic is provided with proper protection and access, it could house the valve there as well. Similarly, placing the valve near the main entry is feasible if that location serves the water supply and remains accessible and climate-controlled.

So, there isn’t a single mandated location; all of these could be acceptable under the right conditions. The main requirements are protection from freezing, ease of access for operation and maintenance, and proper integration with the rest of the standpipe system.