The Check Valve Assembly is an OEM replacement part for Whirlpool dishwashers. It is a component that regulates water flow and pressure, allowing water to enter the dishwasher during designated cycles but preventing backflow. The check valve plays an important role in the overall water distribution system of the dishwasher.  Causes of a bad check valve can include mineral buildup blocking the valve ports over time, damage to the valve mechanism or seals, or decreased valve integrity from wear and repeated use.  Symptoms of a bad check valve include: Leaks or water not properly entering the dishwasher  Incomplete or inefficient washing and rinsing cycles Strange sounds coming from the water inlet area Higher water usage due to faulty draining  Note: O-ring included. This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore models.This part fixes the following symptomsWill not drainPart Number 675238 (AP2910020) replaces 2844, 300800, 3369482, 3371226, 719927, 719930, 719950, AH382661, DW128, EA382661, K35-228, PS382661.