I'm looking at 3/4" thermostatic valves (currently the American Standard R540) and in all applications they show either the shower or the tub port being used with the other port plugged. Is there any reason I can't utilize both ports?
The application is a horse wash stall. The "shower" port would feed a hose reel ceiling mounted at the center of the stall. I'd like the tub port to feed a separate sillcock. The sillcock will be used for filling buckets to soak hoofs and as a backup for when the hose reel branch is shut down during freezing temperatures.