The Delivery Tube is an OEM replacement part for Frigidaire dishwashers. This tube is designed to supply water to the upper spray arm from the pump assembly. By doing so, it plays a role in ensuring that the upper rack of dishes receives adequate water coverage for effective cleaning.  Causes for a malfunctioning Delivery Tube can include blockages from food particles or mineral deposits, general wear and tear from regular use, or damage incurred during maintenance or installation. Symptoms of a bad Delivery Tube include: Inadequate cleaning of dishes on the upper rack Water not reaching the upper spray arm Unusual sounds during the wash cycle This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.Part Number 5304507087 (AP6037539) replaces 154824201, 154464101, 4456448, PS11770593.