The Ceramic Pre-filter — the first stage of filtration for Santevia's Gravity Water System — removes large-sized particles and contaminants from tap water. *The smallest microplastics found in tap water are approximately 2.5 microns; the Ceramic Pre-filter eliminates particles greater than 0.3 micron size *Filters microplastics, rust, bacteria and sediment *Compatible with all models of the Gravity Water System