DC-900325-1.9, Duracast 325 Gallon Heavy Duty Vertical Tank | 900325 When it comes to storing hazardous chemicals, it’s hard to find a tank that performs better than Duracast’s plastic vertical tanks. These tanks are manufactured to meet the highest industry standards and will not need to be replaced again and again. Built to be long-lasting, these above ground tanks have important structural elements that add to the tanks' overall toughness. The polyethylene resin that makes up each one of these tanks contains UV stabilizers, which extend the life and durability of the tanks. Because these tanks are rotationally molded, they do not have any of the joints that tend to cause leaks. These tanks can be used either outdoors or indoors. They are designed to perform well in both environments.