How does a standpipe affect a firefighter’s water supply on a tall building?

• A. By providing on-site water to hose crews on each floor
• B. By storing water in rooftop tanks only
• C. By connecting directly to the municipal water main on the street
• D. By pressurizing the basement sump pumps

Answer: (A)

Standpipes provide a ready water source inside a tall building, so firefighters can pick up hoses and attack the fire on the floors where it’s occurring. The system feeds water up through vertical risers with outlets on multiple floors, giving crews immediate access without waiting for water to be carried up from street hydrants. While a building may source that water from the municipal supply or include rooftop storage as part of the overall system, the key purpose is to have on-site water accessible to hose crews on each floor. The other ideas—water stored only on rooftops, a direct street-main connection without floor outlets, or using basement sump pumps—don’t describe how standpipes provide readily available, floor-by-floor water for fire attack.