From: timothy42bach@gmail.com   
      
   On Tuesday, August 29, 2023 at 6:24:12 AM UTC-4, Peter W. wrote:   
   > It is called a "tempering valve" - what it does is, theoretically, prevent   
   scalds by not allowing the hot water to run alone. Some are thermostatic, most   
   are pressure-based. Those that are thermostatic tend to fail-cold. Those that   
   are pressure-based    
   can fail either way, or altogether. Generally, one must replace the cartridge   
   - that is the internal part that does the mixing - to fix either. In   
   hard-water or high particulate (sediment) situations, failures are quite   
   common and can be very annoying.    
   >    
   > Peter Wieck    
   > Melrose Park, PA   
      
   I'm pretty sure this is a 2004 thread risen from the dead.     
   But anyway, I haven't seen a thermostatic one though they probably exist.  All   
   the ones I've seen in a large campus setting has been pressure based but the   
   limit was a mechanical stop that couldn't be adjusted.  What we found when we   
   had a lot of    
   complaints, particularly in group shower rooms like at a gym or old dormitory,   
   is that the pressure from hot and cold water supply had to be within pretty   
   tight constraints or these did not work.  There was nothing wrong with the   
   valve, but if it got    
   more than maybe 5 pounds pressure on either it got strange results.  And that   
   can happen pretty easily with large usage upstream.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)