Tom V Uniontown , OH February 09, 2018 Appliance: Whirlpool Washer WTW6600SW2 Whirlpool Washer Wtw6600sw2: Water valve screeching when filling. How to replace Water Inlet Valve. Replaced valve. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes