400 gallon project

[untamed]

Originally Posted by Delphinus

Man I see myself just busting the fitting if I tried using something like that. Also broke far too many tanks overtightening bulkheads too (mind you smaller tanks with 1/4 glass .. maybe 1/2" and up is not so delicate). Just a thought, if it's a union that's not sealing, could you see about a new O-ring maybe? (as an alternative)

It's the threaded connection on the union, not the union portion itself. I was concerned about over tightening it, though. This enabled me to give it another 1/4 turn.

In most cases, I've found hand-tightening bulkheads to be sufficient as long as you have a nice smooth, flat surface to seal against. (Use good quality bulkheads!)