The fire department connection in front of a high-rise is vandalized. How does the pump operator charge the standpipe system?

• A. Charge the second floor stand pipe connection
• B. Charge the ground floor stand pipe connection
• C. Charge a mid-floor stand pipe connection
• D. Charge the first floor stand pipe connection

Answer: (D)

When a standpipe system must be pressurized without using the external Fire Department Connection, the pump operator feeds water into the system at the lowest accessible point. Charging the standpipe through the first-floor standpipe connection puts water at the base of the vertical risers, pressurizing the entire system so hose teams on upper floors can access it. Introducing water at the bottom minimizes friction losses and the elevation water must travel, making it more reliable to establish pressure throughout the standpipe network. Other floor connections require water to travel farther up the risers before reaching the attack lines, which can reduce pressure and delay supply.