(a) formulate, adopt, promulgate and enforce complete rules, regulations, orders and directions for the security of life and health in the city, which shall not be inconsistent with the sanitary code; and

(b) in conjunction with the board of examining plumbers, formulate, adopt and promulgate rules and regulations for plumbing and drainage which shall govern the same. 2. The rules, regulations, orders and directions promulgated and adopted pursuant to the provisions of this section shall be known as the sanitary code of the city. 3. Before such rules and regulations shall take effect they shall be approved in writing by the mayor in cities having a population of fifty thousand to one hundred seventy-five thousand and by the common council or similar legislative authority in cities having a population of less than fifty thousand. After such approval the sanitary code of the city shall be published in such manner as the legislative authority shall prescribe. 4. The sanitary code of such cities may embrace all matters and subjects to which and so far as the jurisdiction, power and authority of the department of health of the city extends not inconsistent with the constitution or laws of the state, and may be revised, altered, amended or annulled from time to time by the commissioner of health or health officer of the city with the approval of the mayor in cities having a population of fifty thousand to one hundred seventy-five thousand and the common council or similar legislative authority in cities having a population of less than fifty thousand. The provisions thereof shall be binding and in full force and effect in such city.