Brita Purity 450 Quell ST replacement cartridge for scale reduction in coffee and hot drink machines as well as combi ovens. Designed for the heavier duty requirements of larger beverage machines. Specifically reduces the carbonate hardness in the water, preventing scale deposits. Unwanted smells and flavours, chlorine and heavy metals that impair the aroma and the attractiveness of food and drink are removed. Furthermore, the filter in the water safely retains any coarse and fine particles.