Gail B Greenwood , SC July 24, 2022 Appliance: Whirlpool Undercounter Dishwasher DU1100XTPT0 Whirlpool Dishwasher Du1100xtpt0: My old dishwasher wasn't draining. How to replace Dishwasher Drain Pump. Replaced the Drain Pump and Check Valve. Working like It should now. The video really helps with this too! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes