For many years, the top load washing machine was the dominant style of washers since its inception in the 1920s. The drum of top load washer is filled with water and the agitator moves the clothes around, cleaning the entire load of wash. Although this style has not really been improved since the 1940s, the top load machine has been extremely reliable.
In fact, the older top load machines are the most reliable machines ever sold. The classic Whirlpool machine has been the most popular product in the appliance industry and has been sold around $399 since the 1970s.