What are the set pressures for a 1 ¾" 100' Pre-Connect front bumper line?

The correct answer focuses on the appropriate working pressure associated with a 1 ¾" pre-connect hose line, which is critical for efficient firefighting operations. For a 1 ¾" hose, a set pressure of 75 psi at a flow rate of 175 GPM is standard practice within the fire service. This pressure is established to ensure that adequate water is delivered effectively while minimizing nozzle reaction and allowing the firefighter to maintain control of the hose line.

When flowing water through a hose line, it’s essential to maintain a balance between sufficient pressure to reach desired flow rates and managing the physical capabilities of the operators. The choice of 75 psi for 175 GPM aligns with established guidelines for operational effectiveness, ensuring that firefighters can efficiently manage the hose while delivering water to suppress the fire.

The other answers present pressures and flow rates that do not correspond to typical configurations for a 1 ¾" pre-connect. Understanding this standard pressure helps ensure safety, efficiency, and effectiveness during fire suppression operations.