Lee J Atlanta , GA January 30, 2016 Appliance: Whirlpool Refrigerator WRF989SDAF00 Whirlpool Refrigerator Wrf989sdaf00 / : Water leak from the top casing. How to replace Water Reservoir. I replaced the filter housing and the tank supply. A bit difficult but not terrible. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes