Since replacing my HW heater (and thanks to those who assisted) I'm now running it at 'normal' temperature (60 deg C, which is kind of hot but I hear it's safer in terms of bugs) I now find the temperature of the shower is rather prone to fluctuate - if the dishwasher or washing machine etc are running it can be a little unpleasant. Since I am renovating the downstairs bathroom, it seems silly if we won't be able to run two showers at once, so some sort of thermostatic valve would make sense. I am pretty sure the cutout in the existing shower stall will be compatible with most newer one piece shower faucets, plus from the looks of things I could probably use the existing hardware with a different mixer (not that I'd really want to)

From a cursory glance, the Moen exact temp could be an option and lots of places to buy Moen bits here (although I would consider buying online) but from what I see it's a 3/4" fitting and all my stuff is 1/2".

I don't want to get into things like hw recirc or anything too fancy, the other bathroom has a tub/shower combo with the pullout plunger. I do have some access to it from underneath in the garage, otherwise I could just wait til we reno the upstairs bathroom (not very well done and we'd like to do better, but it'll be the kitchen first so could be down the track a fair ways)

So am I looking at the right thing? Is it possible to use adapters on the 3/4" valve? I haven't looked at local offerings (kamloops BC) to see what's available/what's code.

TIA