What is the target GPM when flowing 1 3/4" hose that's pumped at 100 psi at the nozzle?

To determine the target GPM (gallons per minute) when flowing a 1 3/4" hose pumped at 100 psi at the nozzle, we refer to standard flow formulas used in firefighting. Typically, a 1 3/4" hose is designed to deliver an optimal flow rate between 150 and 180 GPM under normal operational pressures.

When a nozzle is set to 100 psi, it aligns with common practices for achieving effective firefighting water delivery. The flow rate of 150 GPM strikes a balance that allows firefighters to effectively combat fires without excessive water flow that could lead to control issues or wasted resources.

This target is also established to maximize the effectiveness of the hose diameter and pressure settings, ensuring that the operator can maintain a manageable stream while achieving adequate reach and penetration into the fire zone. Hence, selecting 150 GPM as the target flow provides a practical and efficient approach for fire ground operations.