... gasproduce to ozone and water mixed which can directly used for running water,sewage water ,dringking water and swimming pool water treatment and so on .2 ... ,CHYS-2C-24, and so on, "CHYS" means water ozone machine, "2"means water treatment capacity(just like above)."C" means it will ... -X type used CFK series ozone generator. 3,CE certification water treatment machine CHYS-D