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A Guide to Filter Coffee Machines Filter coffee machines can be used to produce an extremely rich and satisfying cup coffee. With the right tools you can achieve an optimal taste and brewing process that is gentle on the machine. The key is ensuring that you have the right equipment and that you follow the guidelines for the ratio of coffee to water grinding, filter positioning and timing. This will make a huge difference in the quality of your coffee. The water tank The water tank in the filter coffee maker stores the water used to brew coffee. You