KleenWater Premier Whole House Water Filter System, Transparent Housing, Three Dirt Rust Sediment Cartridges, 1 Inch Inlet/Outlet Our best, complete whole house filtration system with 1 inch inlet/outlet and 20 gpm flow rate Equipped with filter wrench, mounting bracket and hardware Three dirt, rust and sediment filters, housing accepts any universal 4.5 x 10 inch cartridges Transparent housing made of heavy duty safe PET (polyethylene) plastic