Everpure EV9324-02 Insurice Twin i2000 2 System Reduces chlorine taste and odor and other offensive contaminants New and improved Micro-Pure II media inhibits the growth of bacteria Precoat submicron technology reduces dirt and particles as small as 1/2 micron in size Manifold features water shut off, flushing valve and outlet pressure gauge Sanitary cartridge replacement is simple, quick and clean. NSF Certified under NSF/ANSI Standards 42