Customer Questions and Answers for Dishwasher Drain Hose With Check Valve by Whirlpool

Dan, your check valve is inside the drain pump assembly WP8268375 You'll need to remove the pump accumulator/cover to access it. Before that, if you havent yet, disconnect the drain hose from the disposal or drain plumbing under the sink, start the dishwasher and let it wash a couple of minutes, then cancel and drain the water into a large bucket or pale. This will usually clear any debris or garbage that may have accumulated in the sump and drain hose. Thanks and Good Luck