18-29-607.2.2 Piping for recirculation systems having temperature-actuated mixing valves.
   Where a temperature-actuated mixing valve is used in a system with a hot water recirculating pump, the hot water or tempered water return line shall be routed to the cold water inlet pipe of the water heater and the cold water inlet pipe or the hot water return connection of the temperature-actuated mixing valve.
(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)