First off...
Suburban OEM t-stat is 130*F ....they offer an optional 140*F t-stat
Atwood OEM t-stat is 140*F....NO optional fixed temp t-stat BUT they do have an optional 110*F - 150*F adjustable style that replaces the fixed 140*F t-stat
IF you have an Atwood
If you have a Suburban then no lower temp replacement is available
BUT IF you have a Suburban GAS ONLY then an DIY mod can be done using a residential water heater adjustable t-stat. Install it in the open area to left of propane st of t-stats (place where the electric set would be installed)
The residential t-stat would have to be tied into the OEM propane set ----but it would be controlling temp and still have High temp shut off from OEM t-stat
SO which BRAND/MODEL do you have....???? (really helps with responses!)
Personally I do not like 'mixing valves'....they are problematic as it doesn't take much to clog hot in from water heater so that one does not get ANY hot water.
T-stat temps
Small volume tanks require hotter initial temps so hot water will last longer.......end user tempers it by mixing in cold water at the faucet/shower
