Robert K Randolph , MA March 19, 2017 Appliance: Whirlpool Washer WFW8500SR01 Whirlpool Washer Wfw8500sr01: Water not draining from washer. How to replace Washer Water Pump. I found a video on your website that shows how to replace the water pump. It seemed doable so I order the part Tuesday night, received it Thursday. Replaced it in about an hour. Washer is 10 years old but works like new now. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes