An impeller washer is a type of washing machine that uses a low-profile cone, wheel, fin, or disc that spins or rotates to gently rub clothes against each other to help loosen stains. Impellers are low-profile cones or discs found in the wash basket that spin/rotate to rub clothes against each other to get them clean. Impeller washers use advanced technology to get the same benefits as agitators, but they take up less room, allowing you to clean larger loads of laundry. Impellers are gentler on clothes, reducing wear and tear, and they tend to be more energy-efficient, as they use less water and electricity than agitator-based machines.