Could be a real problem
Ron, Obviously I don't have to worry about that in Key Largo , but you might have a problem if it freezes. When I rebuilt my '77 O25 I had to cut the pendant tube to remove the galley. Considering how well the boat is built I was very surprised at how thin the walls were on the tube. Before I glassed it back into place I added several wraps of 7 0z. glass tape around the whole thing right to the top. If yours is as thin as mine was, I think that it could split if water does freeze in it. That sinking feeling would follow soon after the thaw. Sorry I don't have any good suggestions about how to fix your problem, but you are right to be concerned.