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.
Del. Code tit. 9, § 6717
Licensed plumber to connect property with sewers or mains
9 Del
Official source: Delaware Code Online. Reproduced from public-domain Delaware statutes; confirm against the official source for the current text. Not legal advice.