S-700 RO system 5 stage RO system (ro water purifier,reverse osmosis system) S-700 RO systemItem NO:ZH-RO-S-70050GPD/75GPDPower: 25WSuitable water ... bad smell and organic chemical pollution in water.4: CSM RO membrane which removes bacteria, Virus, Corpuscle, other solute and chemical ... to separate from air, then prevent from second-hand pollution. (ro water purifier,reverse osmosis system)