Combined water cartridges

Combined cartridge

— cartridges that combine a polypropylene filter element with activated carbon or ion-exchange resin. Thus, the mechanical purification of water, for which polypropylene is responsible, in such models is supplemented by either carbon purification or the removal of hardness salts (for both, see "Filtration"). Buying such a combined model can be a good alternative to purchasing two separate cartridges.