Description Free Standing Tanks are selected when transportable (non D.O.T. regulated) containment is required for indoor or outdoor applications. Tanks are equipped with molded-in legs to support the tank and band locators for tie down. Tanks are manufactured from medium- or high-density polyethylene with U.V. inhibitors and designed for containment of liquids of up to 1.7 specific gravity. Tank walls are translucent for level viewing and equipped with gallon indicators.65 Gallon Ace Roto-Mold Horizontal Water & Liquid Storage Tank Includes:5â Vented Manway1â Female Threaded NPT Outlet Fitting in the middle pointing outward or on the end pointing outward.This tank sits flat and does not require a skid to sit on the ground.Dimensions: 39"L x 24"dia