Originally Posted by electric_beer
Also, are you 100% positive that you have the holes going the proper way on your manifold? Remember you put the holes DOWN towards the bottom. I think that is a common rookie mistake.
This information isn't entirely correct. Slot direction does not matter according to John Palmer.http://www.howtobrew.com/appendices/appendixD-1.html
"The slots can face up, down or to the side; hydraulically, it makes no difference." Palmer even has a picture of a tun with slots facing upward.
Maybe if your system relies on siphoning it would matter, but it really doesn't matter. Why else would a SS braid manifold work? It's essentially slotted all the way around.