Endurance® Water Filtration System, Endurance® Twin, (1) EC210 Prefilter, (2) SEN Fibredyne® submicron carbon block cartridge, reduces chlorine, taste & odor, (1) 2SR-BW phosphate cartridge For scale reduction, outlet pressure gauge, 100,000 gallons, 7.50 gpm, 0.2 micron, 3/4" inlet, 3/4" outlet, NSF 42 & 53 (EV943730)