I purchased the "by-pass" refrigerator filter that looks identical to the "pur" filter that the refrigerator requires. Then I installed a large under sink water filter system that I plumbed for ONLY the water going to the refrigerator. The complete filter system kit was only $36.00 and requires a filter change every 2 yrs when used for sink and refrigerator water. So I probably won't have to replace the filter but every 3-4 yrs. the big bonus is now I have great water water pressure from the fridge door and finally have "solid" ice cubes again.