... T33(all the filter elements are in-line)level cartridge namecartridge functionfirst stagein-line PP FilterRemoving sand, rust, mud, ... Removing bad smell & filtering organic sediment third stagein-line PP FilterRemoving sand, rust, mud, sediment in waterother ... germ, virus, corposcule, other solute & chemicals fifth stageIn-line Post active Carbon filtration Adjusting & improving water taste Maintenance ...