It is unlawful to break, injure, mar or deface, interfere with or disturb any building, machinery, apparatus, fixtures, attachments or appurtenances of the waterworks, or any hydrant, curb stop and box, meter, water supply or service pipe or any part thereof, or deposit anything in any curb stop and box, or commit any act tending to obstruct or impair the intended use of any of the above mentioned property, without permission of DMU or Fire Chief or excepting cases herein or otherwise provided by ordinance.