The Hydro Life filter utilizes the patented KDF media in conjunction with granular activated carbon (GAC) to provide superior filtering and protection from many contaminants. Fine mesh activated carbon provides safer, cleaner, better tasting water by filtering our contaminants including those that cause bad odor and taste. The EPA approved filter media, KDF, controls bacteria growth that may occur in standard carbon filters. Easily replace your quick connect under counter water filter kit without the use of tools. Working pressure range: 20-100 PSI. Maximum flow rate: 1 GPM Fits: HL 170QC kit.