Uncrushed gravel, used for under-bedding on any water softeners that need to have a support media bed. Water softener gravel comes steam cleaned, however during shipping there may be a minimal amount of dust that collects on it, but it can be rinsed off during your water softener's backwashing cycle. You may need a water softener loading funnel to pour this gravel and other water softener media into the tank.
This gravel promotes good water flow and even water distribution through the under-bedding. It will maintain the quality of the treated water, specifically in softeners. Three inch layers are recommended in graded support beds.