The Sump is an OEM replacement part specific to GE-brand dishwashers. Located at the bottom of the wash chamber, the sump collects dirty water from each wash cycle.   Causes of a bad sump can include cracks that leak water or mineral buildup clogging drain components over extended use. Improper drainage prevents the machine from functioning as designed. Symptoms of an issue with the sump include:  Puddles or water leaks inside or outside the dishwasher  Standing water not fully draining after each cycle Moisture damage risking other internal parts This part is also compatible with Hotpoint, RCA, and some Kenmore models.Part Number WD18X10008 (AP3140329) replaces 943448, AH259528, EA259528, PS259528, WD18X10011.