Does anyone here know what professional breweries use as their "airlock"? I cant imagine they have blow-off tubes sticking out of each massive tank. Are they all equipped with a spunding regulator or are they doing something else?

Hey all, first time posting. Hope this is the right spot. I recently got a new toy (SS Brewtech 7gal Unitank) and put my first batch of beer (Beer A) to ferment in it. I made a new batch (Beer B) about a week later and wanted to put it into the Unitank, so I moved Beer A to a glass carboy to...