It is unlawful for any person to waste water or allow it to be wasted, from imperfect or leaking stops, valves, pipes, closets, faucets or other fixtures, or to use water closets without self- closing valves, or to use the water for purpose other than those named in the original application upon which water rates are based, or to use it in violation of any provision of this chapter. (Prior code § 18-19)