Tempering valve or Anti-Scald device?
My youngest daughter (6) is autistic and her "thing" is water. Recently, unbeknownst to us she will disrobe and jump in our downstairs shower when the spirit moves her. It's a older standalone jacuzzi brand shower stall with one handle control and diverter knob for body jets.
Now, obviously we don't want her doing this unattended, but she can be rather sneaky and we often don't catch her until she's already been in a for a minute or two. I want to make doubly sure there isn't a risk of scalding. In the short term after discovering the behavior I have just turned the water heater (indirect via my boiler) down to 115.
Short of padlocking the shower, I was thinking I could install a Watts tempering valve at the heater on the hotlines to the two bathrooms, but after reading the instructions on the Watts site, they all say "These Watts valves should never be used to provide “anti-scald” or “anti-chill” service." Why is that? Should I instead be replacing the entire shower control with an anti-scald model? I guess that would be preferable, but would require some extensive work as the common wall is shared with our kitchen and the previous owners left us no access.
What about those anti-scald shower heads (hotstop)? Are they any good?
Now, if I could just get my 10 year old boy to TAKE a shower. :D
Any advice is appreciated...thanks!