§ 42-13. Protection of pipes.

All outside piping shall be laid in solid earth or in a trench. All pipes shall not be located near or in the same trench with other pipes except steam lines for the heating of oil. Propping of pipes on wooden blocks is prohibited. Pipes conveying oil if laid inside a building shall be laid in a trench at least three inches deep and cemented in after inspecting except where impracticable, when they shall be protected from mechanical injury. Suction and return lines shall run from tanks or pumps to the burner in the most direct manner. All pipes shall be painted.