DuPont WFPF13003B Universal Whole House 15,000-Gallon Water Filtration System Filters Up To 15,000-Gallon For Home or Office Features Universal 500 Series Poly Block Cartridge Standard System has 3/4 in. inlets and outlets. Improves Clarity and Taste of Incoming Water, Also Protects At The Kitchen Tap 3-Year Limited Warranty.