(2) The Department of Public Health shall conduct inquiry in any city, town, village, township, or county or at any other place in the State when reasonably necessary in the judgment of the Director of the Department of Public Health to safeguard the health of any person or persons in this State, on account of piping or appurtenant appliances within any building, or outside, when such piping and appliances are for the use of plumbing as defined in this Act and for the use of carrying sewage or waste within or from any building. The Department of Public Health may conduct such inquiries in any city, town, village, township or county in this State by directing the Plumbing Inspector thereof to aid in or conduct such inquiry or investigation in behalf of the Department of Public Health or the Department of Public Health may designate some other person or persons to conduct such investigation.