The Brita Classic filter cartridge reduces limescale and substances such as chlorine, which affect the taste and odour of tap water. Furthermore it reduces aluminium and certain heavy metals (like copper and lead). Certain pesticides (such as Diuron) and organic impurities are also reduced. The result is cleaner, clearer, great tasting water for hot and cold drinks and delicious food. You also have less scale build-up in your domestic appliances.