it include the sand filter, carbon filter,Mic-filter, Satisfied that the ion exchanger,RO system and so on, stainless steel. PRETREATMENT OF THIS MACHINE HAS ADOPTED STAINLESS STEEL MULTIMEDIA FILTER, ACTIVE CARBON FILTER TO REMOVE LARGE SIZE IMPURITIES AND FLOATING MATERIAL EFFECTIVELY. WATER INPUT INDEX OF RO FILMS IS IMPROVED SO THAT EXTRAORDINARYSMELL AND REMAINING CHLORINE OF THE RAW WATER ...