Water Softener Tank Size Chart

This water softener tank size chart [sizing chart] recommends the best water softener tank sizing and resin capacity chart with an average water hardness of 10 GPG.

Gallon/DayGrain/DayGrain/Regeneration (1 Week)Softener Capacity (Grain)Resin Tank Size (Cubic Feet)
2002,00014,00016,0000.75
3003,00021,00024,0001.0 or 1.5
4004,00028,00024,000 or 32,0001.0 or 1.5
5005,00035,00032,0001.5 or 2.0
6006,00042,00040,0002.0
7007,00049,00048,0002.0 or 3.0
8008,00056,00056,0003.0
9009,00063,00064,0003.0
100010,00070,00064,000 or 80,0003.0 or 4.0

Note:

  • We take an average water hardness of 10 GPG (for hard and very hard water)
  • We recommend regeneration is 1 week for the best performance.
  • It depends on your water hardness and your demand of water-consuming to have a properly water softener tank size chart.
Key Features:
  • Works efficiently on water that’s moderately hard
  • Decent capacity for small families of up to 3 people
  • Fast water flow rate of up to 15 GPM
water softener tank size chart

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