The Aqua-Pure AP802 Heavy Duty Whole House Filter Housing is designed for larger households and high flow or commercial applications. The AP802 comes with the heavy duty housing, and "Aqua-Grip" wrench. AquaPure cartridges AP810-2, AP811-2, AP814-2, and AP815-2 can all be used with this housing. Cartridges sold seperately. Housing features 1" pipe connections and is 20" in length.