Exclusively designed for the steaming hot water tap system from InSinkErator® UK, these genuine Insinkerator brand filters deliver the clean water you demand and represent excellent value.  Long-life filter with two-stage filtration Water is first passed through a calcium filter to remove any limescale or calcium before it even enters the tank. Once inside the tank, the water goes through a carbon filter which removes 99% of natural waterborne contaminations such as bacteria, metal contaminants, micro debris contaminants, and even chlorine. It is recommended that you change your water filter every 6 months.