Leveluk Series Water Filter HG-N Type Real Leveluk Filter made by Enagic! (Not Generic or 3rd Party) F8 High Grade Water Filter for the Leveluk " K-8 ONLY" NOTE: Not interchangeable with the the earlier version MW-7000HG filters. Please check your filter base to ensure the F8 will fit your machine. Filter replacement interval: Approx. 3 - 6 months (replacement intervals vary depending on usage and water quality)