Originally Posted by davepeds
I thought, if not soldered, then once the wort got to below the bulkhead as it drained I'd lose gravities effect and wouldn't be air tight enough to have a siphon. Does everybody with a dip tube have it soldered together?
I have a copper dip tube with 2 unsoldered connections and have never had an issue with losing the siphon. The only problem that being unsoldered has presented, was the time I knocked one of the connections apart stirring with my spoon while chilling... I dipped my entire forearm into sanitizer and reached in to reattach it. After that incident, I used channel locks to ever so slightly warp the elbow so it slides on with more tension and no issues since.
Silicon is also a common way to do it, especially with false bottoms it seems. Either way you go I think would work just fine.