1.5 stages RO water purifier 2.auto backflush water purifier 3.civil use purifier 4.easy renew filter cartridge 5.CE 5 stages RO system water purifier 5-stage filtration:Stage 1: PPF filter. Remove the sand, suspended material, colloid, iron scale and micelles.Stage 2: Granular activated carbon filter. Remove the smell , maintained Chlorine and trichloromethane.Stage 3:compressed activated carbon ...