This Dual Media 30k water softener two tank unit, model M3011-WB100TB-C, is designed for residential use applications. Watts activated catalytic carbon media for pre-treatment are highly popular because they correct a wide range of water quality issues by reducing chloramines, chlorine, hydrogen sulfide, VOC’s, taste, odors, and sediment. This unit uses components that are NSF 61 listed. The state-of-the-art computer programming increases efficiency and saves salt and water. The W100 SM series control valve is manufactured from high-tech materials, engineered and tested to perform in the most demanding environments for a highly reliable valve platform. The exchange media is a high-capacity cations polystyrene resin that combines high operating capacity with excellent chemical and physical stability for long dependable life. The resin tank features a non-corrosive fiberglass tank with a thermoplastic inner liner and stainless-steel mineral tank jacket. The brine tank is a combination brine maker and salt storage vessel and is made of tough, corrosion free, high-density polyethylene. All surfaces contacted by water are made from 100 percent polymer components.