2018 Basecamp Water Leak
Since the local Airstream Dealer (Bill Thomas Camper Sales, St Charles, MO) would not assist, I disassembled the left bench and accessed the Pex water supply tubing. I found a clamp, factory installed that had been crimped but was loose and sliding freely on the Pex tubing (a hot water line), and was leaking. It was a very difficult access but once that was repaired, the water leak is fixed. This was in front of a fender well and hard to reach under the shower. It required a special crimping tool around $70.00 but to just have the problem diagnosed was going to be $109.00 at a RV repair shop.
The previous owner told me the water leak was from the bathroom/shower door and only when the shower operated. I found the leak ran across the floor by the shower whenever the pump was on. It is resolved with the above fix.
I really like the Basecamp.