Kevin J Sun City West , AZ July 22, 2019 Appliance: Model FRIGIDAIRE PURE SOURCE Changing water filter. Used the filter housing tool to loosen. It was on hard. Changed the o ring just because it was 10yrs. old so I won't have to do it again. Filter went on easy and housing went back on easily. Highly recommend having the housing wrench to get the housing off. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes