DC-906000-1.2, Duracast 6000 Gallon Plastic Water Tank | 906000 These plastic water tanks are designed to provide long-lasting, quality storage use. The polyethylene resin is mixed with UV stabilizers to extend the life and durability of these tanks. Impact-resistant, these storage tanks stand up well in both indoor and outdoor environments. To reduce the possibility of leaks, these tanks are manufactured to be a seamless, one-piece container. These tanks can be used for a variety of purposes including fire sprinkler systems, irrigation, municipal utilities, agriculture, well storage, rain harvesting and construction. The resin is FDA approved so that you can store potable water safely. To slow down the growth of waterborne algae, store water in black or green tanks. This is a 1.2 specific gravity tank.