All house gas piping shall be black malleable iron or corrugated stainless steel tubing, except that nonferrous metal pipe may be used to connect a built-in gas appliance with the stop cock on the service line, if authorized in writing by the Plumbing Inspector, and A.G.A. rated and approved pipe may be used to connect a gas appliance. Rubber hose connections shall not be used except for intermittently used appliances such as Bunsen-type laboratory burners.
(Ord. 3223, passed - -1992)