I am wanting to add a permanent electronic temperature sensor to a brass rough-in shower valve. For this particular rough-in valve, I can thread a thermowell into the outlet that is normally used for the tub spout, since no tub spout is used.
I can easily turn and thread an aluminum thermowell with my lathe, but I want to ensure that the aluminum and brass will be compatible (i.e. no corrosion) in this application. I have not been able to find any data on using these two metals together in a potable water application.
The reason is I'm trying to avoid having to purchase the more expensive brass stock, and utilize my existing aluminum bar stock instead :)