January 4, 2024
From the 2024 UPC Illustrated Training Manual, Chapter 4, PLUMBING FIXTURES AND FIXTURE FITTINGS
408.4.1 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.
Where multiple or gang showers are installed, such as in athletic facilities or work places, in lieu of individually controlled pressure balance or thermostatic mixing valves, a master thermostatic valves that complies with ASSE 1069 controlling all the showerheads in the system may be used (see Figure 408.4.1). In the master thermostatic valve, a moving piston responds to temperature fluctuations from an expanding or moving bellows, a bimetallic unit or heat-conducting fluid effecting hot and cold water input. Set screws or limit stops are pre-adjusted to maintain a constant outlet water temperature not to exceed 120°F (49°C). Upon cold water failure, the hot water is instantly shut down.
(This is not to be considered the official position of IAPMO, nor is it an official interpretation of the Codes.)
IAPMO
IAPMO develops and publishes the Uniform Plumbing Code®,the most widely recognized code of practice used by the plumbing industry worldwide; Uniform Mechanical Code®; Uniform Swimming Pool, Spa and Hot Tub Code®; and Uniform Solar Energy, Hydronics and Geothermal Code™ — the only plumbing, mechanical, solar energy and swimming pool codes designated by ANSI as American National Standards — and the Water Efficiency Standard (WE-Stand)™. IAPMO works with government, contractors, labor force, and manufacturers to produce product standards, technical manuals, personnel certification/educational programs and additional resources in order to meet the ever-evolving demands of the industry in protecting public health and safety.
Last modified: January 4, 2024