You'll save yourself a lot of grief by using a Sch80 bulkhead rather than the cheap thin ones you get at most LFSs. They have courser threads and thicker gaskets and aren't nearly as finicky as the ones you're using. Only down side is you'll have to use a smaller size as they require larger holes but you can use bushings/reducers before and after to maintain existing pipe size so the effects are pretty minimal.
|