Industrial potato washing line 500 series. The U range washing machines are designed to operate with a water basin. In this water basin, the water used in the machine is recirculated to be used again. The washing drum of the machine is designed to agitate produce in the machine. In combination with water, this process gives an optimal cleaning result. The U 500 washing machine has an outfeed web belt with cleats. The outfeed height of the machine is therefore adjustable, and the excess water falls through the web.