Before any person shall cover or conceal in any manner whatsoever any such connection,
the connection must be inspected by a city inspector to determine the correctness
of the installation. Said inspector, upon completion of his inspection, shall issue
his certificate of approval of the installation, if he shall approve the same, or,
if he shall not approve the same, shall require and direct such modifications as are
necessary to meet the specifications of the city before the installation is approved.