The Aqua-Pure® CBW Series Backwash Filtration System treats water as it enters your home using a heavy-duty lead-free brass valve. A variety of media is available to help address your specific water improvement needs. Benefits of these systems include reduction of Chlorine Taste & Odor and De-Chlorination (using Activated Carbon media), Iron, Acid Neutralizer/pH adjustment (using Calcite media), Particulate and Precipitated Iron (using Filter Sand media) from your water.