Charcoal water filters help to remove chlorine, calcium and undesirable tastes and odors from your water. Periodically, charcoal water filters need to be replaced. We recommend changing the water filter every 60 days or after 60 uses — or more often if you have hard water (water with a high concentration of calcium or magnesium). By doing so, you can help to ensure that your coffee, tea or hot chocolate keeps its full flavor. Compatible with Cuisinart® coffee makers, such as the Coffee Plus™ 12-cup programmable coffee maker, these charcoal filters will help you get the most from your beverages.