QETTLE Q08 REPLACEMENT FILTER CARTRIDGE Your QETTLE tap's filter cartridge is essential to keeping your QETTLE system's heater tank in good health. It should be replaced every 6 months. ---QETTLE Q08 filter cartridge is especially formulated to tackle limescale - the enemy of electric elements such as the one in your QETTLE heater tank! ---If you have a QETTLE MINI, which dispenses filtered drinking water, your QETTLE Q08 cartridge also works to remove impurities e.g. chlorine. ---Thanks to the design of the QETTLE filter cartridge housing, it's very easy to replace a filter cartridge... 5 minutes and the job's done. ---The QETTLE Q08 filter cartridge is completely recyclable - simply dry it out and return it to us and we'll do the rest. ---Your new QETTLE Q08 filter cartridge will come with full fitting instructions.