Water softeners are used to remove hardness minerals from water. Hard water contains high levels of calcium, magnesium, and other minerals. These minerals can cause problems with plumbing, appliances, and clothing. Water softeners remove these minerals by exchanging them with other ions, such as sodium or potassium.
Potassium chloride water softeners work in the same way as sodium chloride water softeners. The only difference is the type of salt that is used. Potassium chloride is a more expensive option, but there are health and environmental benefits to using it.