This Architectural Drawing is AutoCAD 2d drawing of Water tank dimension detail in AutoCAD, dwg files. Tank sizes range from 6 ft. to 120 ft. in diameter with a roof, and up to 200 feet in diameter as an open top tank. Tanks with a roof have capacities ranging from 700 gallons to 500,000 gallons while the open top tanks can be built with even larger capacities. For more details and information download the drawing file.