... start when on water. 3.reverse osmosis Water treatment machine1.RO reverse osmosis pure water deviceUse:Comestic, pharmacy, chemical industries, food ... water.2.Auto backwash, IC microcomputer control system, auto backwash RO film, raw water and well water conductivity is displayed on ... -8≤300FRO-224.0653-8≤300FRO-334.0753-8≤300 ro water purifier