Hi, I've been out of touch for a few days.
Cmor....yes....sealed correctly, no leaks (water or air) , is level....everything perfect! Still took aged to prime. I see there are lots of articles on the WWW about difficulty priming these filters so it seems I am not alone. At least I got mine going eventually....some people took theirs back and exchanged for another make because they had so much of a problem.
Sorry about your problem Jcahow. I'd like to hear what you know about the problem if you have the time to try again.