DC-900325-1.5, Duracast 325 Gallon Plastic Storage Tank | 900325 From certain liquid acids to industrial chemicals, these plastic storage tanks can hold an array of destructive contents. If you own a small winery, these tanks are the perfect size for wine storage. Those who work in agriculture can use these tanks to hold fertilizer. Because these tanks can handle extreme weather conditions and other physical attacks, they do well both indoors and outdoors. These tanks are made of polyethylene resin that is both FDA approved and UV stabilized. The FDA approved resin means that you can safely store potable water, while the UV stabilizers work to prevent sun damage. Each of these vertical storage tanks feature an 16-inch manway fitting on top to fill, drain and clean tanks more easily and quickly.