When should the firefighter at the hydrant charge the supply line?

Charging the supply line should occur when the driver/operator calls for water. This procedure ensures that the line is filled and ready to deliver water to the pump apparatus precisely when it is needed for firefighting activities. The driver/operator needs the supply line charged to ensure adequate water flow and pressure for effective operations at the fire scene.

Initiating the charge at the moment the driver/operator requests it aligns with the coordinated efforts necessary for fire suppression. It allows for an efficient response, as the water supply can be established without delay. Proper communication between the firefighter at the hydrant and the driver/operator is crucial, as it minimizes the risk of any issues related to water supply that may arise from premature or inaccurate charging of the line.