What can be determined using a pump chart if given the flow in GPM, hose length, and hose diameter?

A pump chart is a crucial tool that allows operators to understand how various factors affect the performance of a pump in a fire service context. When given the flow in gallons per minute (GPM), hose length, and hose diameter, one can effectively determine the pump discharge pressure.

The pump chart provides a visual representation of how the flow rate and the characteristics of the hose impact the pressure needed to achieve that flow. By inputting the flow rate and noting the specific resistance offered by the hose (which can be computed based on its length and diameter), operators can calculate the necessary discharge pressure required to overcome that resistance and maintain the desired flow.

This is particularly important for ensuring that the fire apparatus can deliver water effectively and efficiently to where it is needed, such as in firefighting operations. Understanding the relationship between flow, hose characteristics, and discharge pressure allows for better planning and execution of water supply strategies at fire scenes.