... material. automatic control. Usually, this system contains: sand filter, active carbon filter, micro filter, RO system, UV sterilizer, Ozone mixer tank.1 ... impurity that remains in the water, protect the RO film.4. RO system:This system contains: RO film, pressure vessel, frame, high pressure pump, ... kill the germ. 6. Ozone mixer tank:Through this system ,the ozone can mix with the water better, and ...