RO water purifier 5-stage filtration systerm,PP,GAC,CTO,RO,Post-AC, RO Water Filter1.Filtering process: Step one: Preceding precipitation filter core,filtering adsorption in tap water,more than 5 microns in diameter of the colloid impurities, micro mud, rust, bacterial virus, organic pollution minerals sundry etc. Step two: Ultrafiltration membrane ,removing bad smell filtering organia sediment ...