If it tastes good to drink, it will make good coffee. We recommend fresh tap, filtered, or bottled water. We do not recommend using reverse osmosis filtered water or distilled water, as it can damage the brewer’s boiling element.
In reverse osmosis water and distilled water, all minerals are removed, and the water’s PH becomes slightly acidic. The water will leach minerals out of the copper boiling element to return to a neutral PH, eventually damaging the copper element permanently. Because we build Moccamaster coffee brewers to last for a long time, using reverse osmosis or distilled water could significantly reduce the brewer’s life.
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