Water line for ice maker hook up. What a wonderful product. If you think you have a leaky valve be sure to use a mechanics mirror and check this groove. Thanks for sharing that we could check if the line is frozen by removing the kick plate off and unhooking the water line. I have not used platic so far and probaly I will next year. Try this if you are tired of clearing the line all the time. Hugh — I suspect it is frozen but just having a tough time thawing. The second vertical filter is a carbon prefilter. It comes in 12 foot lengths and is relatively inexpensive to buy at your local home center. If your replacement water filters or reverse osmosis membranes are not listed below, try our Water Filter And Reverse Osmosis System Identification Guide. A refrigerator-freezer ice maker produces cloudy ice in a stale-garlic flavor, typically in odd crescent shapes, and stuck together.