408.3 Individual Shower and Tub-Shower Combina-tion Control Valves.

tion Control Valves. Showers and tub-shower combinations shall be provided with individual control valves of the pressure balance, thermostatic, or combination pressure balance/thermostatic mixing valve type that provide scald and thermal shock protection for the rated flow rate of the installed showerhead. These valves shall be installed at the point of use and comply with ASSE 1016/ASME A112.1016/CSA B125.16 or ASME A112.18.1/CSA B125.1.

408.3.1 Gang Showers. Where gang showers are supplied with a single temperature-controlled water supply pipe, it shall be controlled by a mixing valve that complies with ASSE 1069. 408.3.2 Temperature Limiting. The maximum water temperature discharging from an individual showerhead shall be limited to 120°F (49°C) by one of the following methods: (1) A shower or tub/shower combination valve con forming to ASSE 1016/ASME A112.1016/CSA B125.16 where either: (a) The valve is field-adjusted to the required max imum temperature, or (b) The handle position, stop, or temperature limit ing control is set in accordance with the manufacturer's instructions to the required maximum temperature. (2) For gang showers supplied by a single water supply

pipe, a mixing valve that conforms to ASSE 1069 that is field-adjusted to the required maximum temperature. (3) A limiting device conforming to either ASSE

1070/ASME A112.1070/CSA B125.70 or CSA B125.3. (4) A water heater conforming to ASSE 1084. (5) A temperature actuated flow reduction device con forming to ASSE 1062.