Why is it important for the source pumper to begin operation at the correct PSI during relay operations?

Beginning operation at the correct PSI during relay operations is crucial to ensure adequate water flow. When fire departments engage in relay pumping, water is transported from the source to the destination through a series of hoses and pumps. Establishing the right pressure is essential because it affects the volume and velocity of the water being moved. If the pressure is too low, the water flow may be insufficient to meet the demands of firefighting operations or to reach elevated locations, potentially hindering firefighting efforts. Conversely, if the pressure is set too high, it can lead to hose failures and inefficient water distribution. Thus, initiating operations at the correct PSI is fundamental to achieving optimal water flow and ensuring that the firefighting team can operate effectively and safely.