Y'all got me thinking about being a supporting member so I can post a picture.
I understand what you are saying about the drain line going to the compartment door.
I had a trailer like that before.
On this trailer the drain line goes down through the floor of the refrigerator compartment.
The refrigerator compartment is above the street side wheel well a little forward of center.
I can't find the line - or even a hole for the line - protruding through the top of the wheel well, by the frame, or anywhere.
I called Airstream. The girl didn't know, but was supposed to find out and email me info.
I'm surprised someone hasn't been able to say, "It goes through the floor and then to such-and-such a place."
2013 Classic 30 Limited
2007 Silver Toyota Tundra Crew Max Limited 5.7 iForce
2006 Vivid Black Harley-Davidson Road King Classic
1999 Black Nissan Pathfinder LE
WBCCI #1811, Region 6, Unit 56