Keystone's economical chlorine, taste and odor cartridge is made of activated carbon which is proven to remove bad tastes and odors by adsorption. The filter is tightly wound and uses very fine activated carbon particles to maximize adsorption efficiency. The filter also provides 3 micron sediment removal.

Keystone's HPT™ cartridges are designed to reduce chlorine, chemicals, dirt, rust, sediment and silt. They feature the highest chlorine reduction capacity with the lowest pressure drop for excellent taste and odor control. Engineered using the finest coconut shell activated carbon, HPT cartridges are made to the highest standards of the Water Quality Associations's Gold Seal Program.