Richard Moore Posted January 4, 2009 Report Share Posted January 4, 2009 I had a new home today. The water heater was a fairly basic 40 gallon American ProLine (with Flame Guard) and served only the potable water. It was plumbed with a tempering valve directly above it. No harm in having one but I don't believe I've seen one before unless the water heater also served hydronic heat. Click to View 68.83 KB I took a look at the on-line install manual and found this... 3. The manufacturer of this water heater recommendsinstalling a tempering valve or an anti-scald device in the domestic hot water line as shown in Figure 14. These valves reduce the point-of-use temperature of the water by mixing cold and hot water and are readily available for use. Out of curiosity I also took a look at a Rheem manual and found this... Notice: Mixing valves are available for reducing point ofuse water temperature by mixing hot and cold water in branch water lines. Contact a licensed plumber or the local plumbing authority for further information. Not a "requirement" in either case, but I was wondering if youse guys are starting to see these installed? I have mixed feelings about them in this application. On one hand it is an added safeguard against scalding but, on the other, it could mask a developing problem with the water heater thermostat. Quote Link to comment Share on other sites More sharing options...
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