DC-903000-1.2, Duracast 3000 Gallon Plastic Water Tank | 903000 With Duracast’s 3000 gallon plastic tanks, water storage is stress-free and safe. The overall toughness of these tanks means that you do not have to get them replaced over and over again. The polyethylene resin is compounded with UV stabilizers to ensure years of quality use. Their low temperature impact strength prevents these tanks from cracking in cold weather. These tanks are made of FDA-approved resin so that you can store potable water. To keep your water clean, use black and green tanks. These darker colored tanks block out the green spectrum of light to slow the growth of waterborne algae. Common uses for these plastic water tanks include: fire sprinkler systems, rain harvesting, farming, municipal utilities, construction, irrigation and well storage. This is a 1.2 specific gravity tank.