The Hydronix UDF-20BP granular activated carbon (GAC) cartridges are the best choice for your higher flow, taste, odder and chlorine reduction needs. Made with NSF certified materials, the Hydronix UDF-20BP Filter cartridge provides you with the price and Hydronix performance you are accustomed to.
Fits in any system using BB 4.5″ x 20″ size filters.