It is unlawful to make any connection with any city sewer without first having obtained a permit therefor. Applications for such permits shall be made to the city clerk on forms furnished by the city and shall be accompanied by a statement as to the purpose of such connection, the premises to be served and the specifications of such pipe to be connected and the drain from house to sewer pipe. Such applications shall be referred to the plumbing inspector; and no such permit shall be issued unless he shall have found that the code of the city would be complied with by making of such connection. (Prior code § 38-3-7)