Each outlet, including a valve or cock outlet, shall be securely closed gastight with . a threaded iron plug or cap immediately after installation and shall be left closed until an appliance is connected thereto. Likewise, when an appliance is removed from an outlet and the outlet is not to be used again immediately, it shall be securely closed gastight. In no case shall the outlet be closed with tin caps, wooden plugs, corks or the like.
(Ord. 368. Passed 8-4-50.)