Arnel G Marysville , WA October 08, 2023 Appliance: Whirlpool Undercounter Dishwasher DU1100XTPSA Whirlpool Dishwasher Du1100xtpsa: The dishwasher will not drain. How to replace Drain Pump. I drained the standing water and replaced the drain pump. I ordered the pump from AppliancePartsPros.com. Parts came in within 48 hours. Great website and service. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours