S-700 RO system 5 stage RO system (ro water purifier,reverse osmosis system) S-700 RO systemItem NO:ZH-RO-S-70050GPD/75GPDPower ... tank, a faucet, 4 meters water pipe, a bag of components 2) process 1: 5micron PP Cartridge which removes sand, mud ... prevent from second-hand pollution. (ro water purifier,reverse osmosis system)