The Whirlpool W10782773 Circulation Pump & Motor Assembly circulates water through the dishwasher for effective cleaning during wash cycles. This replacement assembly combines a pump and motor to draw water from the dishwasher tub and push it through the spray arms, creating the water pressure needed to clean dishes. Proper water circulation supports thorough coverage inside the tub and consistent washing performance. A worn or defective assembly may cause weak water flow, poor cleaning results, unusual noise, or insufficient spray arm movement.