The Keurig coffee maker has an optional water filter that fits into the removable reservoir to help eliminate chemicals from your standard tap water when brewing coffee. The filter is a charcoal unit which requires replacement every two months on average. Replacing a Keurig charcoal filter requires preparing the new filter installation. New filters have loose charcoal dust that you must eliminate before installing it in your water reservoir. Replacement filters are available at home improvement centers.
Soak the new charcoal filter in a container of cool water for 10 minutes to help remove the loose charcoal in the filter. While the filter is soaking, remove the water reservoir front the Keurig coffee maker and empty the water into the sink.
Grasp the filter housing base with your fingers and hold the water reservoir in your free hand. Pull the filter housing straight up to unlock it from the bottom of the reservoir. Squeeze the tabs on the bottom base of the filter housing and pull the upper portion with the dial away from the bottom. Pull the old filter out of the upper portion and discard.
Rinse the new charcoal filter under cool water until the water runs clear through it. Insert the new filter into the upper portion of the housing. Rotate the dial on the top of the housing with your finger until the indicator is set two months ahead.
Insert the upper portion of the housing into the lower base portion until the tabs lock. Lower the complete filter assembly into the water reservoir and push down until it locks into position. Place the reservoir back onto the Keurig coffee maker.