The air temp here is a pretty constant 72F. The pool here is about 70 F and I’d like to turn it up about 5 degrees. The pool guy says he can’t. I don’t believe it. There’s got to be a mixing valve somewhere. There’s no control in the underground mechanical room that I can recognize as maybe controlling water temp.
This is the only control I can see without climbing onto the roof, and I don’t have access permission. Does this look like a thermostatic control for water temp?