Flammable liquids shall not be drawn or handled in the presence of any open flame or fire. Except as permitted below, flammable liquids shall be drawn from tanks at points inside buildings only by pumps or other methods approved by the clerk or his designated agent. Draw off pipes terminating inside buildings shall have a valve at the discharge end when delivery is by gravity; the shutoff valve should preferably be of the automatically closing type and, in addition, an emergency valve shall be provided. Draw off devices for class I and II liquids shall not be located on floors below grade.
Any approved domestic type all burner may be supplied by gravity from a tank of two hundred seventy five (275) gallons maximum capacity. A second tank may be provided if connected by an approved three-way valve so that not more than two hundred seventy five (275) gallons can be discharged at any one time.
The clerk or his designated agent may permit gravity flow of flammable liquids in manufacturing or jobbing plants where the nature of business requires it. (1961 Code)