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    Water Hardness Test Strips


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    Single use water hardness test strip to test water quality for your espresso machine or coffee maker. The test strip comes with a key for reference of different water hardness levels. The preferred hardness level for espresso machines and coffee makers is at about 50 ppm or 3 grains per gallon.

    Water quality from city water and well water changes seasonally and bottled water doesn't remain at a constant hardness level from bottle to bottle. We recommend using test strips often to maintain a clean espresso machine and coffee maker.

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