Which concept entails positioning as close to the water source as possible to minimize friction loss?

• A. Grid Systems
• B. Proximity
• C. Safety
• D. Rescue and Fire Attack

Answer: (B)

Proximity to the water source is about placing the pump and supply setup as close as practical to where water is drawn, so the length of the supply hose is minimized. Friction loss in hose increases with both length and flow, so a longer hose path causes more pressure drop before water reaches the attack line. By shortening the distance, you reduce that friction, helping the pump deliver the needed pressure to the line more efficiently. In practice, this means positioning engines and supply lines near hydrants or drafting points to keep hose length to a minimum and maintain adequate nozzle pressure. Other concepts address different aspects of firefighting—organization, safety, or attacking the fire—rather than reducing friction loss in the water supply.