See attached screenshot. The drain, when applied a redstone single, should pour onto the casting table. It seems that this functionality is broken. I am at -632 82 1110 and have this setup. It should empty the entire basin as ingots automatically. It was not working so I added button to test and the button doesn't seem to work either.
Never mind, I figured out my issue. The redstone automation only works when you are using a seared faucet. I was using a casting channel. I'll leave this up in case anyone else encounters this issue.