... purifierCONFIGURATION :Five Stages: PP+UDF+CTO+RO+T33(all the filter elements are in-line)level cartridge ... namecartridge functionfirst stagein-line PP FilterRemoving sand, rust, mud, sediment in water second ... filtering organic sediment third stagein-line PP FilterRemoving sand, rust, mud, sediment in waterother organic substances hazardous to healthforth ...