Waste drainage from refrigeration equipment in fixed food establishments shall be conducted by a closed system, such as by an impervious pipe or tube to a sewer line approved by the City, and shall be disposed therein by means of an indirect connection. No refrigerated storage cabinet or device shall be used for the storage of anything other than food or beverage which is ultimately intended for human consumption or for such equipment or devices used in the processing or preparation of food and beverage which requires refrigerated storage. An accurate and readily visible thermometer shall be maintained in each refrigeration device. (Ord. 4883-NS § 1 Exhibit A, Ch. 7 Art. 5 § 9, 1976)