It's more than the coffee and the brewing process that affects the flavor of coffee. Sometimes it's something as seemingly unrelevant as the water you're using. Great tasting impurity free water makes great tasting coffee. Krups Duo Water Filter two pack contains 2 Activated Charcoal Replacement DuoFilters. These 472-00 duo water filters fits most Krups coffee makers including FME, FMF, 466, 467, KP1010. Krups replacment water filters leaves your water cleaner and fresher for better tasting coffee every time. Use a new filter every month for optimum brewer protection and coffeetaste. Helps your brewer last longer by reducing chlorine, sediments, and impurities. Helps your brewer last longer by reducing chlorine, sediments, and impurities