A. Gasoline and naphtha shall never be handled through the same pump and pipe lines as kerosene and fuel oils.
B. Pipe lines shall have a definite color scheme for painting to indicate the product which is being carried by the respective lines. The color red shall be for gasoline and naphtha. Valves on lines in pump houses shall be tagged to denote the product handled and controlled by each valve.
C. Pumps delivering to or taking supply from tanks or tank cars shall be provided with valves on both suction and discharge pump. (1968 Code, §21.137)