Product Info Catalog Plumbing Water Conditioners Accessories 50-LB. Water Softener Salt Block 50-LB. Water Softener Salt Block 50-LB. Water Softener Salt Block 50-LB. Water Softener Salt Block Request a Quote UPC: 41482350511 SKU: 622553 Model Number: 35051 50 LB, Water Softener Salt Block, 99.87% Pure Salt, Is Washed, Filtered, Dried, Screened & Compacted Into Blocks For Use In Water Softener Systems.