Carbon Filter Replacement Filter Insert – 3 PackThis plug in Carbon Filter kit filters out odour, chlorine and organic contaminants from normal tap water, leaving it hygienically clean. It also comes with a new quick release coupler so the system can be inserted into an existing hydration system. The internal Carbon filter is also replaceable and is available as 3 pack replacement kit. Plug in Carbon filter kit to filter odour, chlorine and organic contaminants from normal tap water. Features: