The Frigidaire 154365401 Lower Drain Impeller helps ensure efficient water removal during your dishwasher’s drain cycle. This internal component is part of the pump assembly, designed to move water out of the dishwasher after each wash. It works by spinning rapidly to create the necessary force that pushes wastewater through the drain system, preventing buildup inside the tub. By maintaining proper drainage, it supports consistent cleaning performance and helps avoid standing water issues. Replacing a worn or damaged impeller can improve draining efficiency, reduce the risk of clogs, and contribute to the overall reliability and proper operation of your dishwasher.