A water filter bag from Grainger helps remove sediment from high-flow, industrial water systems and chemical processing-equipment. These durable bag filters are made of polypropylene or polyester felt and mesh, in sizes from 5 microns to 200 microns. Get a durable commercial water filter bag for beverage production, petroleum processing and alkali and mineral-acid production. A filter bag can strain out unwanted sand, sediment and foreign material for a consistently cleaner final product.