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WATER SOFTENER SIZING CALCULATOR

Number in Household
Hardness in Grains
Iron mg/l*
*One mg/l (milligram per liter) is equivalent to one ppm (part per million). There are 17.1 ppm per grain of hardness. Consider an iron filter prior to a water softener if your iron level exceeds 2 ppm of clear water iron.
Minimum Capacity for Efficient Sizing:       Find Softeners