All services used for fire protection shall be either metered or be provided with a closed valve. All future fire service connections shall be installed in similar manner. In no case shall any tap be made upon any pipe used for fire purposes, or tank connected therewith, nor shall the use of any water be permitted through any unmetered service nor through any pipes, tanks or fixtures therewith connected for any purpose other than the extinguishing of fire on the premises, except that these services may be tested out occasionally but the water department must be notified in advance of, and a permit obtained, for such test. For any violation of this provision the city may charge the minimum rate or cut off the service. No connections whereby saltwater may be introduced in any way into any pipe connected with city water mains shall be permitted. (Ord. 2961 § 1, 2015; Ord. 1090 § 33, as amended, 1952)