Maytag UKF8001 PUR Refrigerator is certified from NSF and it is a perfect refrigerator for reducing cysts, asbestos, and mercury while holding useful fluoride in the water. The taste of water will be free from chlorine or odor taste. You need to replace the filter at every six months like other refrigerators for better performance. Maytag has option to place the water filter inside which is really good and it will be easy to carry anywhere you go. Filter replacement is really very easy, you just need to turn the refrigerator off when you want to change filter and you can easily change it. UKF8001 model is compatible with many models such as UKF8001AXX, 67003523, 67003526, 67003527, 67003528, 12589203, 12589206, 12589208, 12589210, 13040216N, 13040216N, UKF9001.