This Watts Premiere small in-line small capacity water filter is perfect for undercounter and tabletop ice machines. This kit comes complete with the filter medium, all water lines and fitting. This connects directly with the water supply for continuous filtering. These models do not have a gague so we recommend changing them every 6-8 months depending on your water quality and ice usage. The next step up are filters with replaceable cartridges. if you have east access to the water line, these are are great low cost water filter option.