Where are the hydraulically most remote hose connections in a building generally located?

Where are the hydraulically most remote hose connections in a building generally located?

• A. At the highest floor
• B. At the lowest floor
• C. In the mechanical room
• D. On the main floor near the entrance

Answer: (A)

In a standpipe system, the pressure available at a hose connection decreases as water travels upward and through piping. The point that requires the most pressure—the hydraulically remote point—is the farthest from the water source, which in a typical multistory building is the highest floor. Placing hose connections on the top floor ensures that even the most distant location can receive a usable fire stream, since the system is designed to meet minimum pressures at that remote point. Lower floors would not define the limiting pressure, and placing outlets in the mechanical room or on the main floor near the entrance would not address the top-floor demand.

In a standpipe system, the pressure available at a hose connection decreases as water travels upward and through piping. The point that requires the most pressure—the hydraulically remote point—is the farthest from the water source, which in a typical multistory building is the highest floor. Placing hose connections on the top floor ensures that even the most distant location can receive a usable fire stream, since the system is designed to meet minimum pressures at that remote point. Lower floors would not define the limiting pressure, and placing outlets in the mechanical room or on the main floor near the entrance would not address the top-floor demand.