Standard cation resin ยท Mobile Soft Water

Mobile Soft Water MSW8S-0.25 cu ft Softener Resin

Standard cation resin

Updated October 2026

Quick verdict

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

Strength
0.25 cu ft.
Trade-off
Re-bedding means draining and opening the tank.
Right buyer
Re-bedding an existing softener.
Grain capacity (maker)
8,000 grains
Resin volume
0.25 cu ft
Material
Plastic
Product weight
5 lb
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What it does for your water

The Mobile Soft Water MSW8S-0.25 cu ft Softener Resin is replacement cation resin in a 0.25 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 0.25 cu ft is about 8,000 grains at full salt, or 6,000 at an efficient setting.

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

Match the old bed's volume and don't top the tank up to the neck; resin needs freeboard to expand during backwash.

Other listed details: model MSW8S-0.25; material Plastic; resin 0.25 cu ft.

The listing gives a shipping weight of 5 lb.

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

  • 0.25 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 numberMSW8S-0.25Retailer
Product weight5 lbRetailer
MaterialPlasticRetailer
Load capacity (seller)8000 gRetailer
Grain capacity (maker)8,000 grainsRetailer
Resin volume0.25 cu ftRetailer

Units to weigh against it

Other softener resin in the catalog

Every softener resin on one grid

Final verdict

A practical 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 0.25 cu ft of the Mobile Soft Water MSW8S-0.25 cu ft Softener Resin?
About 8,000 grains at full salt and about 6,000 at an efficient salt setting.