Water softener resin tank with its control valve next to a storage tank

Generic photo: రవిచంద్ర (Ravichandra) · CC BY-SA 4.0

Potassium chloride instead of salt in a softener: what changes and what to tell the customer

Softeners can regenerate with potassium chloride instead of sodium chloride, but KCl costs much more per bag and does not regenerate resin quite as effectively, so the unit usually needs a higher salt dose or hardness setting. Sources disagree on how much (about 10% to 30% more). The benefit is no added sodium in the softened water.

Cross-checked ~15 min easyBrands: All

Before you start

KCl is still a salt; keep the brine tank lid on and clean spills to avoid slips and corrosion.

Diagnostic steps

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