... mixer tank.1. sand filter:This filter can remove the impurity in the water like silt, grain, suspended matter , etc..2. ... and organic matter in the water.3. micro filter:This filter can remove the impurity that remains in the water, protect the RO film.4. ... tank:Through this system ,the ozone can mix with the water better, and kill the germ in the water. 1raw water tankV=10m3, sus3042sand filterφ ...