This packaged Reverse Osmosis (RO) system, complete with pretreatment for the production of high quality water. A backwashable carbon filter protects membranes against oxidation damage from chlorinated feed water supplies. Protection against membrane fouling from feed water hardness is provided by a Smart Choice™ water softener and brine tank combination. System installation requires a single feed water connection, a single treated water outlet connection and one drain line connection. Power requirements of pictured unit are 120 volt 60Hz, 1-phase supply for the pretreatment and 230 volt, 60Hz, 3-phase for the RO unit. Similar systems of various flows and power requirements are available.