I have to run and can't find it right now, but I had the same elbow connector crack that you did and managed to get it fixed so it doesn't leak a drop. The trick is to cut the elbow out with a razor blade and replace it with a plastic thru-hull fitting using 3M Marine adhesive. Much easier and less costly than buying a whole new sack. Mine's been water-tight for a year now. Later today, I'll find the thread & post up.
Last edited by ottog1979; 06-03-2010 at 3:07 PM.