All persons who may install or equip any residence, business house, apartment house or other building located and situated within the city with any installation of equipment shall use in any installation, whether for domestic or industrial use, only a standard grade of pipe or piping. All appliances used in connection with any installation shall be a standard grade and type of equipment. Any system which uses any form of manufactured or liquefied petroleum gases must bear the label of approval or listing of Underwriters’ Laboratories, Inc.
(1998 Code, § 54-102) Penalty, see § 96.99