All necessary plumbing work to be done in connecting any property with a county sewer or water main shall be done by a plumber licensed to do business in this State, in a good and workmanlike manner, and with good and proper materials, and shall be subject to the approval of the county government or its designated agent.

9 Del. C. 1953, § ?6717; 55 Del. Laws, c. 263; 57 Del. Laws, c. 762, § ?10A;