No person shall without authority use, tamper or interfere with any fire or street hydrant or water main gate valve. The Water Department may permit water to be used temporarily from any fire hydrant for nondomestic purposes in localities where no other supply can be obtained. In such cases, a reducer shall be attached to one of the hydrant openings and the supply controlled by means of a small valve and meter, which can be obtained from the Water Department.
(`89 Code, § 161.220)