Enjoy clean, clear and iron-free water at every faucet with APEC Water Systems 3-stage whole house system. This 3-stage 20 in. Big Blue (BB) whole house water purification system can effectively remove sediment, chemicals and iron to deliver cleaner more manageable water to every faucet for all your water needs. Ideal for whole house filtration, light commercial or industrial applications with a fast flow rate. The 1st stage Sediment filter captures and traps dirt, sand, silt, and scale and rust particles down to 30 microns. This durable, polyester filter has a pleated design to maximize dirt-holding capacity and is washable and reusable. The 2nd stage Iron filter utilizes high purity manganese dioxide to effectively reduce iron, iron staining and the metallic taste in your water by converting soluble ferrous iron into insoluble ferric iron. The 3rd stage Carbon filter is a radial flow granular activated carbon (GAC) cartridge that adsorbs the insoluble ferric iron to effectively treat iron. Lastly, chlorine, odours, taste and organic compounds are removed by the carbon filter to provide chemical-free water to every faucet and water outlet. High quality housing sets consist of three 20 in. x 4.5 in. industry standard BB housings. The polypropylene (HFPP) cap has 1 in. FPT inlet and outlet ports for fast-flow rates and are pre-attached to a mounting bracket for easy setup and installation.