Under What Conditions Are Phosphate Softeners Use?
Sodium phosphates react readily with calcium and magnesium salts. Phosphate softeners are generally used only on naturally soft or presoftened waters, however, becauser relatively high amounts of magnesium in the water cause a very sticky precipitate in reacting with phosphate. Properly used, phosphate softeners can effectively reduce hardness to very low levels. Improved ion exchange softening methods have largely supplanted phosphate softners in new installations.
