QL2 Water Filtration System, QL2-OCSĀ², Single, (1) OCSĀ² Precoat primary filtration cartridge, reduces chlorine, taste and odor, (1) self-contained scale inhibitor feed, 1,500 gallons, 0.5 gpm, 0.5 micron, 3/8" inlet, 3/8" outlet, NSF 42 & 53 (EV927560)