No refrigeration equipment or air-conditioning equipment requiring the use of water supplied by the village shall be installed by any user unless a permit authorizing such installation is issued by the Superintendent.
All installations of any individual or collective system of refrigeration or air conditioning in any premises being supplied with water shall be made only in accordance with the following specifications:
A. 
Installations with a capacity of three tons or more shall be equipped with a water-conserving device, such as an economizer, evaporative condenser, water-cooling tower or similar apparatus, which device shall not consume for makeup purposes in excess of 5% of the consumption that would normally be used without such a device.
B. 
Installations of such equipment under the capacity of three tons shall be provided with an automatic water supply regulating device so as to limit the flow of water in relation to the condenser temperature reduction requirements of the apparatus, and in no case shall the equipment use in excess of two gallons per minute for each ton of capacity.
C. 
Each direct water connection to any such equipment shall be equipped with a backflow preventing device, except in installations where the water supply piping has no contact with the refrigerant.
D. 
Any such refrigeration or air-conditioning unit with a capacity of 20 or more pounds of refrigerant shall be provided with a relief valve installed on the outlet side of the check valve of the water supply connection, which relief valve shall be set at five pounds above the maximum water pressure at the point of installation.