In our last article, we dealt with what hot water users really want, and could expect, from their hot water system – if it was designed properly. Namely, we argue, fast arrival of domestic hot water – short time to tap values.
The new paper focuses on the recommended installation practices that plumbers, installers, and/or plumbing contractors should follow to reduce the dangers of scald injuries or thermal shock when installing any type of residential tankless water heater.
IAPMO published the 2021 Uniform Plumbing Code (UPC) and the 2021 Uniform Mechanical Code (UMC) in March. The codes were improved with safety provisions for the protection from legionellosis, safe installation of alkaline water treatment devices, and protecting homes with the inclusion of requirements for leak detection, just to list a few.
ASSE 1014-2020, Performance Requirements for Backflow Prevention Devices for Hand-held Showers; ASSE 1020-2020, Performance Requirements for Pressure Vacuum Breaker Assemblies; and ASSE 1069-2020, Performance Requirements for Automatic Temperature Control Mixing Valves, have been designated as American National Standards by the American National Standards Institute (ANSI) and are now available for purchase.
I’m a solar engineer – not a mechanical one. That’s one reason that I found out the hard way that designing domestic hot water (DHW) production and distribution systems for multifamily buildings is a lot harder than designing a single-family residential system.
Every year, in the United States, thousands of people suffer serious scald injuries in showers or tub-showers after the hot water system temperature has been adjusted. These injuries can be prevented with the proper controls and adjustments of the maximum temperature limit-stop on each shower valve.