Peter P Templeton , CA March 31, 2017 Appliance: Whirlpool Washer WFW9470WW01 Whirlpool Washer Wfw9470ww01: Water drain pump failed on washing machine. How to replace Washer Drain Pump Assembly. Replaced exactly as the AppliancePartsPros.com showed on their video. It went perfect. Although this was the second pump I placed in 3 years. 80 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes