|(a) Manually operated cylinder valves shall be provided for each cylinder. (b) A manually operated shutoff valve shall be installed in a manifold as close to a cylinder or group of cylinders as practical. (c) Where excess flow check valves are used, the closing flow shall be less than the flow rating of the piping system which would result from a pipeline rupture between the excess flow valve and the equipment downstream of the excess flow check valve. (d) The fill line on storage cylinders shall be equipped with a backflow check valve to prevent discharge of natural gas from the cylinder in case of line, hose, or fittings rupture. (e) Device(s) for emergency shutdown of the compression and dispensing equipment shall be provided at a location remote from the dispensing area. The device(s) shall operate to activate a valve installed at the compression and dispensing area that when activated shuts
off the power and gas supply to the compressor(s) and dispenser(s). The emergency shutdown device(s) shall be visible from the dispensing area(s). (f) Emergency gas shutdown devices(s) shall be distinctly marked for easy recognition according to the requirements of Table 1 of §13.93 of this title (relating to General). (g) Break-away protection shall be provided in a manner such that, in the event of a pull-away, natural gas will cease to flow at any separation.