No person shall place or deposit any dirt or material in any fire hydrant or in any valve box or stopcock box, or commit any act tending to obstruct the use thereof or injure in any manner any fixture connected with the City water system. No person shall commit any act tending to deface, damage or obstruct in any manner any building, machinery, pipes, apparatus or other fixtures of the City water system. (Ord. 981. Passed 6-17-68.)