No refuse or solids of any sort obstructive to the flow of stormwater or wastewater shall be placed, thrown or allowed to enter any public sanitary or storm sewer or allowed to remain on or in any trap or catch basin so as to obstruct the sewers. No person shall injure or break or remove any portion of any catch basin, covering flag, gully grating, flush tank or manhole or any part of any sewer, nor do any act obstructing or any way interfering with the use of any sanitary or storm sewer or the flow of stormwater or waste water through any sewer.
(`89 Code, § 160.130)