CB20 Water Filtration System,CB20-302E, Single, (1) CC1E radial flow granular activated-carbon cartridge, (1) CC3E cartridge, pressure relief valve, outlet pressure gauge, mounting bracket, 20,000 gallons, 5.0 gpm, 0.5 micron, 3/4" inlet, 3/4" outlet, NSF 42 & 53 (EV910032)