§ 15-231 SAME; REFRIGERATION UNIT CONDENSERS AND COOLING JACKETS.
   Except when potable water provided for a refrigeration condenser or cooling jacket is entirely outside the piping or tank containing a toxic refrigerant, then inlet connection shall be provided with an approved backflow preventer. Heat exchangers used to heat water for potable use shall be of the double wall type.
(2010 Code, § 231)