The OMNIFilter CB7 Series of cartridges are a unique, premium cartridge that utilizes several of the Pentair core competencies by merging technologies into one cartridge in order to bring customers a quality product. The CB7 Series cartridges offer the effective chlorine taste & odor reduction found in traditional carbon blocks, joined with the superior sediment reduction to resist premature plugging. These dual purpose cartridges are well-suited for a wide range of applications.