It shall be unlawful for any plumber or pipefitter to do any work upon any of the pipes or appurtenances of the system of waterworks, or to make any connection with or extension of the supply pipes of any consumer taking water from the system until the plumber or pipefitter shall have first complied with the licensing and permit requirements of the municipality. All plumbing shall be skillfully done, and in the manner required by the Board of Public Works. The licensed plumber shall be at all times subject to the inspection and approval of the Utilities Superintendent and it shall be further unlawful to cover or conceal willfully any defective or unsatisfactory plumbing work.
(Neb. RS 17-537) (1972 Code, § 3-406) Penalty, see § 52.99