A. Shutoff Valve Required: All service pipes shall be provided with a shutoff valve on the outside located near the curb line or property line. A suitable valve box shall be installed extending to the surface of the ground, which shall be of easy access and have the top thereof plainly marked "Gas"; provided, however, that the foregoing provisions regarding valves and valve boxes shall not apply to existing services to dwelling houses, but all other services heretofore installed shall be so provided.
B. Separate Valves On Each Supply Line: Separate valves or cocks are required on every supply line or branch if the operation or maintenance of the appliance supplied requires that gas be shut off from the line or branch from time to time, unless gas can be otherwise shut off when necessary with equal safety and convenience. Such separate valves or cocks shall be provided on any branch or supply line which is two inches (2") or more in diameter, or which is rated to supply more than two hundred (200) cubic feet of gas per hour, or which supplies an appliance used for heating inflammable materials or materials which give off combustible vapors or gases.
C. Accessibility: Cocks or valves required under subsection B of this section shall be placed near enough to the appliance controlled and in such location as to be readily accessible at all times, and the handle of the cock or valve shall be easy to reach; but it should not be so close to the appliance that, should an accident occur, it will be impossible to operate it.
D. Circulating Systems: On circulating systems of piping, care should be taken to provide cocks to cut off the supply from both directions wherever this may be necessary.
E. Open And Closed Indications: All cocks should indicate by markings on stops the open and closed positions. (Ord. 15.28)