At what setting should the throttle/RPM be set in a water relay operation?

In a water relay operation, setting the throttle/RPM as needed is essential for several reasons. During such operations, the required pump pressure can vary based on the distance between the water source and the end fire hose, the elevation the water needs to be pumped to, and the total flow demand being placed on the system. Therefore, having the flexibility to adjust the throttle and RPM helps ensure that the pump can deliver the necessary water flow without exceeding prescribed limits.

Adjusting the throttle/RPM appropriately allows for optimal pump performance while preventing issues such as cavitation, which can occur if the pump is not receiving adequate water or is set to an inappropriate speed for the conditions at hand. Thus, setting the throttle/RPM "as needed" aligns with best practices for maintaining efficiency and safety during operations. This adaptability is particularly critical in dynamic responses where conditions can change rapidly, requiring a quick adjustment to maintain flow and pressure throughout the relay operation.