The Aqua-Pure AP141T Whole House Filtration System with Scale Inhibitor includes everything you need for excellent dirt, sediment, and rust filtration as well as scale prevention. The Aqua-Pure AP141T includes filter housing, wrench, and an AP420 filter cartridge that prevents scale buildup by releasing a food grade scale inhibitor. The Aqua-Pure AP141T Whole House Filter System has a flow rate of 10 gpm 5 micron level with a flow rate of 8 GPM and filters sediment, rust and dirt at the 5 micron level.