... 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 ... the water, protect the RO film.4. RO system:This system contains: RO film, pressure vessel, frame, ... the germ. 6. Ozone mixer tank:Through this system ,the ozone can mix with the water better ...