Concealed gas fuel piping must not have any plugged openings except for such gas fuel appliances as will be installed. All plugged openings in concealed piping must be exposed. Concealed unions, standard weight steel couplings, gas cocks, valves or bushings will not be permitted. Concealed dresser-type couplings will not be permitted inside buildings.
(Ord. 296 § 5(d), 1966).