The internal whirlpool water filter cartridge removes chlorine and water impurities such as lead, deposits, cloudiness, and rust that can result from the plumbing system using an activated carbon filter. To ensure that you always receive professionally filtered water in fresh and clean quality from your cooling device, we recommend replacing the universal Bauknecht whirlpool water filter cartridge every 6 months. It is compatible with Bauknecht and Whirlpool SBS refrigerators and features an elongated filter located within the refrigerator base. Part No.: SBS200 484000008726.