The Whirlpool WTW5000DW washer features an impeller instead of a central agitator, which moves the laundry around in circular motions and reduces the amount of water needed for a thorough clean.

The cost of an impeller washing machine is higher because of newer technology, averaging between $600 to $1,400. What Is an Agitator Washer? An agitator washer is a familiar type of top-load machine.

Most washers come in two forms -- those with agitators and those without. Other than the price difference, does having an agitator or not affect your laundry?

Both an agitator and an impeller can be found in top-load washing machines. While both work inside the washing machine to effectively clean your clothes, the main difference is in how they do it.