No faucet, connection, valve or like appliance so constructed as to form a cross-section, directly or indirectly, between a safe drinking water supply and an unsafe or questionable water supply, shall be permitted. No licensed plumber or any other person shall make any cross-connection to the water system of the city, either outside or inside the corporate limits, with any other water system, supply from a well, cistern or any other source whatever, nor from the city water system to any drain pipe, sewer pipe or septic tank. (Ord. 603 (part), 2004: prior code § 5-118)