. Recommended Stage Filter Replacement Cycle Purpose 1 PP Sediment Filter 3-months | Removes particulates with a size larger than 5 {Mabel# FPS) microns and dirt, sand, silt, and rust from water] CTO Carbon Block Tier Removes unpleasant chlorine, taste, oars, oo . Et {Mode# FCC) 6-months |10y dines and coloring. Note: The lifespan of cartridges depends on the incoming water quality and daily usage.