... pure water. maked by sus304 material. automatic control. Usually, this system contains: sand filter, active carbon filter, ... micro filter, RO system, UV sterilizer, Ozone mixer tank.1. sand ... water, protect the RO film.4. RO system:This system contains: RO film, pressure vessel, frame, ... germ. 6. Ozone mixer tank:Through this system ,the ozone can mix with the water better ...