Standard cation resin ยท Purolite

Purolite C100E 1 cu ft Softener Resin

Standard cation resin

Updated October 2026

Quick verdict

A sound standard cation resin for re-bedding an existing softener.

Strength
1 cu ft.
Trade-off
Re-bedding means draining and opening the tank.
Right buyer
Re-bedding an existing softener.
Resin volume
1 cu ft
Dimensions (seller)
18 x 14 x 8 inches
Product weight
49 lb
Prices change often; the button shows today's price.

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What it does for your water

The Purolite C100E 1 cu ft Softener Resin is replacement cation resin in a 1 cu ft quantity.

A cubic foot of standard softener resin is rated about 32,000 grains at full salt and about 24,000 at an efficient setting, so 1 cu ft is about 32,000 grains at full salt, or 24,000 at an efficient setting.

Standard 8% crosslink resin is what most residential softeners ship with.

Replace the same volume your tank holds and leave the free space above the bed the maker calls for; an overfilled tank can't backwash.

From the listing: model C100E; resin 1 cu ft.

The listing gives dimensions of 18 x 14 x 8 inches, a shipping weight of 49 lb and 1 cu ft in the box.

Is it the right unit for your house?

Choose it when

  • Re-bedding an existing softener
  • Clean city or well water

Pass on it when

  • Deionizing (DI) systems

Where it wins and where it loses

Wins

  • 1 cu ft

Loses

  • Re-bedding means draining and opening the tank

Limits to know about

  • Figures are the maker's or seller's own; check fit and capacity against your water test and your equipment's manual.

Maker's figures

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberC100ERetailer
Product weight49 lbRetailer
Dimensions (seller)18 x 14 x 8 inchesRetailer
Resin volume1 cu ftRetailer

Units to weigh against it

Other softener resin in the catalog

Every softener resin on one grid

Final verdict

A sound standard cation resin for re-bedding an existing softener.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How many grains is 1 cu ft of the Purolite C100E 1 cu ft Softener Resin?
About 32,000 grains at full salt and about 24,000 at an efficient salt setting.