Pierce Manufacturing, Inc.: Polypropylene tank is corrosion-resistant, lightweight, and completely isolated from body compartments. Tank is mounted on flexible subframe that helps absorb road shocks, aiding handling and durability. Capacities between 1,800 and 3,500 gallons available. Features 2.5-inch direct tank fill at rear, with fill connections up to five inches in diameter available. Standard 10-inch, 1,000-gpm manual dump valve; eight-inch to 12-inch versions available. (920) 832-3155.