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Water Specification for Espresso Machines

Water Specifications

Voltage Coffee Supply recommends caution when using sodium and hydrogen based ion exchange water softeners. Suggested pressure and flow rate from water mains: 45 to 80 psi (3 or 5 bar) and 8 liter per minute.

value units min max
T.D.S ppm 90 150
Total Hardness ppm 70 100
Total Iron ppm 0.0 0.02
Free Chlorine ppm 0.0 0.05
Total Chlorine ppm 0.0 0.1
pH 6.5 8
Alkalinity ppm 40 80
Chloride ppm 0.0 30

Click here to download this table as a PDF



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