Does the sink drain when the slide is in? Our refrig water line (in a 2014 Allegro Bus 37AP) kinked when the slide was out, but not when it was in.
Tiffin fixed it at Red Bay. Rerouted the line. I would take it to Tiffin rather than one of the other shops in the area. I heard the wait times are quite good right now. (Considering the trip myself for some misc repairs.)
2014 Tiffin Allegro Bus 37AP