DC-908000-1.2, Duracast 8000 Gallon Plastic Water Tank | 908000 These 8000 gallon vertical tanks are the perfect size for bulk water storage. People can use these tanks for rain harvesting, fire sprinkler systems, municipal utilities, well storage, agriculture, manufacturing, construction and irrigation. These tanks are rotationally molded to be a one-piece container with no seams, joints or welds to cause rust or leaks. The UV stabilized polyethylene resin allows you to keep tanks outdoors. Their low temperature impact strength keeps these tanks from cracking in freezing weather. To slow down the growth of algae, it is best store water outdoors in green and black tanks. These tanks are equipped with a 16-inch vented lid and measurement indicators. This is a 1.2 specific gravity tank.