Chemical-resistant fiberglass-reinforced polypropylene tank for exceptional strength and long life * Easily removable filter grid pack is secured by a single nut to simplify maintenance * Unique internal design ensures optimal filtration and backwashing efficiency for longer runs between cleanings * Curved vertical grids provide maximum filter surface area for better cleaning * This Filter has a conveniently located 1-1/2-inch drain for easy and efficient cleanout; measures 22-inch length by 50-inch height by 22-1/2-inch width