If someone can help, let me know if I’m seeing this system operation correctly. The cold water in is on the right and the hot water out is on the left (this part I know). The mixing valve is on the hot output side for the regular hot water supply and for the hydronic heating, what I don’t get is how the mixing valve works if the cold water comes into the system after the valve.What you can’t really see in this picture is that the hot water out from the tank is hooked up right under the mixing valve and also to the timer operating what I presume to be a recirculation unit for the hydronic heating. The other copper pipe at the bottom of the pic is just the tpr out. I assume this setup is strictly for the hydronic htg system. I never did find where the cold supply t’s off to feed the rest of the townhouse so I guess it’s in the wall before this point.