18-29-607.2.1.2 Demand recirculation controls for distribution systems.

   A water distribution system having one or more recirculation pumps that pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe shall be a demand recirculation water system. Pumps shall have controls that comply with both of the following:

   1.   The control shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture, or sensing the flow of hot or tempered water to a fixture fitting or appliance.

   2.   The control shall limit the temperature of the water entering the cold water piping to 104°F (40°C).

(Added Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.2.1A Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VI, § 27, repealed § 18-29-607.2.1A, which pertained to piping insulation.

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)

18-29-607.3 Thermal expansion control.

   Where a storage water heater is supplied with cold water that passes through a check valve, pressure reducing valve or backflow preventer, a thermal expansion control device shall be connected to the water heater cold water supply pipe at a point that is downstream of all check valves, pressure reducing valves and backflow preventers. Thermal expansion tanks shall be sized in accordance with the tank manufacturer's instructions and shall be sized such that the pressure in the water distribution system shall not exceed that required by Section 18-29-604.8.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.3.1 Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VI, § 27, repealed § 18-29-607.3.1, which pertained to pressure reducing valve.

18-29-607.3.2 Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VI, § 27, repealed § 18-29-607.3.2, which pertained to backflow prevention device or check valve.

18-29-607.4 Flow of hot water to fixtures.

   Fixture fittings, faucets and diverters shall be installed and adjusted so that the flow of hot water from the fittings corresponds to the left-hand side of the fixture fitting.

   Exception: Shower and tub/shower mixing valves conforming to ASSE 1016/ASME A112.1016/CSA B125.16 or ASME A112.18.1/CSA B125.1, where the flow of hot water corresponds to the markings on the device.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)