Blue,
I have a 25.2, like you, and I've found that if I'm anywhere near level the AC drains right where you've got it. Others may have a different experience based on which slide they have. It has to go somewhere and if the designers don't build a drain channel into their spec (and some do, I think Tiffin tries to provide a channel on all of they coaches now) it will find the route of least resistance.
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