It shall be the duty of the mechanical inspector to make inspections of any mechanical work, gas piping, appliance installation or connections at the request of the installer, department head, owner, agent, tenant, or occupant of any building or the premises where such gas piping or mechanical work is located in order to ascertain whether or not the mechanical work, gas piping or appliances in such building or premises are in a safe condition. The inspector shall have the authority to enter any building or upon any premises at all reasonable hours to ascertain if the provisions of this article, or any ordinances relating to mechanical work, gas piping or appliance installations have been or are being violated or being complied with, and should the inspector, upon making such an inspection as requested by the installer, owner, agent, tenant, or department head, find an unsafe or unsatisfactory installation, the inspector shall have the authority to request the gas company to shut off the appliance or service at the meter (depending upon the seriousness of the conditions as determined by the inspector), tag same, and shall notify the installer immediately if the job is a new installation, or the owner, agent, tenant, or one in charge of the property to cause the same to be remedied within a specified time, not exceeding ten days if the same is not a new installation. Should the installer, owner, agent, tenant, or one in charge of the premises fail to make such corrections, changes or repairs, or fail to notify the inspector to make a re-inspection within the specified time after receiving such notification to comply therewith, said owner, agent, tenant, installer or person in charge, shall be considered maintaining an unsafe mechanical installation and violating the requirements hereof, and the inspector shall make a re-inspection of the premises and report the findings to the chief building official, who shall in turn cause action to be taken in the proper court to secure compliance, and the penalties as set forth in this chapter shall apply. It shall be the duty and the responsibility of the installer or one making such correction, changes or repairs to notify the inspector within forty-eight hours after completion of such correction, changes or repairs, and request for re-inspection.