DOMESTIC RO PLANT It has 4 stages PP SPUN SEDIMENTCartridge; filtering sand, rust, sediment, etc. in waterBLOCK ACTIVATED CARBONRemoving bad smell, chlorine, organic sediment in water &filtering suspended particles.RO MEMBRANERemoving bacteria, viruses, heavy metals, salts & other harmfulparticles.IN-LINE POST ACTIVE CARBON CATRIDGEAdjust pure water taste, keeping water fresh