The Piston & Nut Assembly is an OEM part for GE dishwashers. It plays a critical role in the dishwasher’s water management system, helping to control water flow and ensuring proper drainage during the wash cycle. You should replace this piston & nut assembly if it becomes worn out or damaged. Causes of a bad piston & nut assembly can include mineral buildup from hard water, general wear and tear from regular use, or physical damage due to debris or foreign objects in the dishwasher. Symptoms of a bad piston & nut assembly include: Water not draining properly from the dishwasher Puddles of water at the bottom of the dishwasher after a cycle Unusual noises during the drain cycle Incomplete cleaning of dishes due to improper water flow This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.This part fixes the following symptomsWill not drainPart Number WD24X10018 (AP2617344) replaces 821081, AH260690, EA260690, PS260690, WD22X0133, WD22X133, WD24X0199, WD24X0220, WD24X199, WD24X220.