Stage 1, the Carbon Fiber PFAS Removal Filter (Model FCPFDS), reduces chlorine, PFAS, colloids, and particulates for up to 12 months. Stage 2, the CTO Chloramine Removal Filter (Model FCNCDS), further purifies the water by reducing chloramine, chlorine, bad taste, THMs, and VOCs, also lasting up to 12 months. Stage 3, the CTO Lead Removal Filter (Model FCPBDS), adds another layer of protection by reducing lead, chlorine, THMs, and VOCs for up to 12 months. Finally, Stage 4, the Taste-Polishing Activated Carbon Filter (Model FTDS), enhances the drinking experience by reducing chlorine, eliminating unpleasant odors, and improving overall taste, with a service life of up to 12 months.