Construction
Water Softener Sizing Calculator
Right-size your softener so it regenerates every 5-7 days. Too small means hard water bleed-through.
Grain capacity needed
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- Compensated hardness
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- Recommended unit
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- Salt per regen
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FAQ
7 day regen target? +
Yes — too frequent wastes salt; too infrequent allows resin to oxidize (especially with iron).
Why 5x iron? +
Iron fouls resin much harder than calcium per ppm. Pre-treatment or iron filter is recommended above 3 ppm Fe.