All of the provisions of the Plumbing Code shall be considered a part of this code.[1]
[1]
Editor's Note: See Ch. 182, Plumbing.
The installation, repair, replacement and relocation of pipes, fixtures and other apparatus for distributing gas supply in any premises shall hereafter be performed by a licensed plumber in accordance with the rules promulgated by the Superintendent of Buildings.[1]
A. 
Test of gas piping. After all piping is installed and all outlets capped, the plumber shall apply, in the presence of the Superintendent of Buildings, an air-pressure test equal to a column of mercury six inches in height, which shall be maintained for at least 10 minutes. A mercury gauge shall be used. The covering up of any piping or the connection thereto of any meter, gas fixture, gas heater or range is forbidden until a certificate showing the approval of this test has been issued by the Superintendent.
B. 
Setting of gas meters. The setting of meters by any gas company is forbidden until a certificate is filed with it from the Superintendent of Buildings certifying that the gas piping has been inspected and the test requirements have been complied with.
[1]
Editor's Note: Note: In the absence of such roles, the rules and recommendations of the American Standard Gas Safety Code and of the Requirements for House Piping and Appliance Installation, as adopted and currently amended by the American Gas Association, shall be the generally accepted good practice.