Installs easily to your exterior water supply. Kit includes two filters. Sediment filter (#7) features a multi-ply filter media for greater dirt holding capacity and longer life. The GAC/KDF filter (#5) removes inorganic contaminants before they reach the carbon bed, protecting it from bacteria fouling and build-up. Both filter cartridges fit 10 in. housings for most brands. Kit also includes a spanner wrench for filter housing sump removal and garden house fittings. Cartridge replacement recommended every 12 months or when you notice a change in taste, odor or if flow of water diminishes.