Thanks, ER333,
You put so much thought and effort in all of these posts.
I think the arrow in your first picture in #2354
http://www.freerepublic.com/focus/news/3524221/posts?page=2354#2354
does not point to a bell coupling, but simply to a male end,
the bell coupling should point up-slope.
That is the only way I have ever seen VCP laid.
BUT... the picture in post #2273
http://www.freerepublic.com/focus/news/3524221/posts?page=2273#2273
certainly does appear to be the other way around...
I just don’t really know.