Hi guys,
I bought a 100L SS conical from Keg King, which came with ball valves. First ferment was fine, then an infection crept in. You guessed it! Turns out it was the ball valves. Fermenting wort enters the chamber around the ball valve every time you take a sample, which I've found to be a pain in the arse to clean.
I've since bought butterfly valves and a reallly nice sprayball from glacier in the US. As every commercial brewery uses butterfly valves on their fermentors, why are companies supplying us with ball valves? Happy to be corrected here, but I think ball valves are just for flow control, thread and ball valves don't belong on fermentors...
Happpy and infection free fermenting!
Cheers