DC-900525-1.2, Duracast 525 Gallon Plastic Water Tank | 900525 Fulfill your temporary water storage needs with these 525 gallon plastic water tanks. Comprised of FDA-approved resin, these vertical tanks are completely safe to store potable water. The tanks are rotationally molded to be a one-piece unit, with no seams or joints to cause leaks. Gallon calibrations are molded into each one of these tanks so you can measure content levels quickly at a glance. The vented lid is 16 inches, which provides ample room for filling, draining and cleaning. The polyethylene resin is made with UV stabilizers to increase each tank’s life span. People typically use these tanks for irrigation purposes, as an emergency water solution or to keep spare drinking water. This is a 1.2 specific gravity tank.