Ion Exchange & Water Softener Sizing Calculator
Calculate resin volume, vessel size, salt consumption, and regeneration requirements for water softening and ion exchange systems.
Water Quality & Operating Parameters
GPM
1 gpg = 17.118 ppm as CaCO₃
ppm (mg/L)
Each 1 ppm iron adds ~5 gpg equivalent hardness demand on resin
hours
Typical: 24 hours (daily regen) to 72 hours for light use
lbs / ft³ resin
Low salt: 6 lbs/ft³ (20K grains) | Mid: 10 lbs/ft³ (27K grains) | High: 15 lbs/ft³ (30K grains)
Resin Capacity at Different Salt Doses
| Salt Dose (lbs/ft³) | Capacity (grains/ft³) | Salt Efficiency (grains/lb salt) |
|---|---|---|
| 6 | 20,000 | 3,333 |
| 8 | 24,000 | 3,000 |
| 10 | 27,000 | 2,700 |
| 12 | 29,000 | 2,417 |
| 15 | 30,000 | 2,000 |
Softener Sizing Results
Total Grains per Cycle
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Resin Volume Required
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Vessel Diameter
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Salt per Regeneration
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Salt per Month
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Regen Water Usage
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per regeneration
Recommended Fleck Control Valve
Related Products
- Water Filtration & Softener Systems — Complete softener packages
- Fleck Control Valves — 5600SXT, 2510SXT, 2850, 2900S models
- Chemicals & Resin — Ion exchange resin, salt, cleaners
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