... water purifiecation, water softning equipment, high efficiency fiber filter, activated carbon filter and Brackish water RO desalination plant, RO equipment/ ... osmosis system(water filteration)Stage 1 :10 inch 5 micron pp filter. Remove the sand and iron scale and something that ... water.Stage 4:RO membrane. The hole diameter is 0.0001 micron, removing the bacteria ,virus ,heavy metal icons ,remained ...