Not sure what you are asking. Do you have a water heater issue?
I'm also confused about your question. Are you asking about an anti scald valve for a shower?
I think she may have meant water feature, like a pond. Not sure how you would keep it the temp of very warm bath. Not sure what to put in that; not even tropical fish like it that warm.
Sorry I understand can be high temps at least 2 or 3 months out of the year upwards to 120 degrees. Wondering if I should even attempt to build something, then what would survive? Sky Valley Area in Southern California
Yes you can have a water feature, just expect it to evaporate quickly and you will continually need to add water to it. No plants or fish will survive, just do a pretty fountain to have the sound of running water.
If you're planning a pondless waterfall with pump, you will experience a great deal of evaporation. Be prepared to refill as needed, to avoid burning out the pump motor. You will experience much higher water bills, as well., unless you cut power to the pump, during these periods. Note also that algae forms rapidly in ponds in sunny locztions, for which you will need to add barley straw or liquid treatments, and perhaps scrape away the algae.
I doubt that anything (pond plants, fish, etc) will survive your temps, unless you can locate tropical plants capable of surviving your specific conditions.
You may be better to plant items nearby the pond (with sufficient mulch) that can withstand your heat, yet would welcome the humidity offered by the pond.
First of all Olivia, Naomie, Deanna and Shore thank you all so very much for the replys to my question. First time ever posting so thanks for great experience. I'm going to be doing this for sure within the next couple of week's so keep fingers crossed for me please. And knowing myself I will be "going for the gusto" as they (use to say). Yep im that old lol thanks again!