§ 13.22. Fuel for internal combustion engines.
(a) Intake and discharge connections on tanks as well as on cylinders, which are used to supply fuel directly to internal combustion engines, shall be labeled to designate whether they communicate with vapor or liquid space.
(b) A positive automatic shutoff valve or regulator shall be provided in the fuel system to prevent flow of gas to the mixer when the engine is not running.
This section cited in 34 Pa. Code § 13.4 (relating to scope); and 34 Pa. Code § 13.96 (relating to filling of cylinders).
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