Anyone who already owns a BeFree water filter from Katadyn can extend the life of the water filter indefinitely with the BeFree replacement element. The filter element should be replaced after a maximum of 1000 liters of filtration capacity (depending on water quality). With a high flow rate of 2 liters per minute and a Stay Clean mouthpiece, clean drinking water can be enjoyed without any issues. The BeFree replacement element fits all sizes of the BeFree water filter.