I received the plumbing diagram from Jim Parrett in Customer Relations and he also went over to the production line and there is no exterior water shut off valve. As far as he knows Airstream has never
installed an exterior water shut-off valve. I appreciate his effort, coutesy, and promptness in giving us a definitive answer as to the location of the shut off valve. He will also contact the literature department in regard to the exterior water service being listed and explained in no less than three places in the new owners manual.
"During freezing weather this line should be drained. Shut off the valve inside the lavatory and leave the exterior valve open.
Note: On some units only the exterior water service shut off valve will be located inside the lavatory cabinet...Always check to see if the water supply has been cut to the exterior service before using the rest of the water system in freezing weather."
Page F10 The exterior water service shut off valve is located...since the exterior water service is located beyond the heated area of the trailer, the exterior valve and its supply line can be damaged if the water is not turned off in freezing temperatures. In these temperatures shut off the valve in the lavatory cabinet...the fifth valve is for the exterior water service. Always check to see if the water supply has been cut to the exterior service before using the rest of the water system in freezing weather."
Page C7 Winter traveling
The exterior water service line to the utility compartment is in an unheated section of the trailer and must not be used below feezing temperatures.
A water valve is provided so the water can be turned off to the line. The exterior water service shut off valve is located in the lavatory cabinet. Close the shut off valve...
Jim also told me that damage because of frozen pipes is not covered under warrantee nor the installation of the shut off valve to make the heated tanks of any utility in cold weather camping.
So guess what is on our to do list now. We will also add an access panel to get to the pump and this shut off once installed.
Makes you wonder where the literature people got their text from doesn't it?
Methinks this is peculiar.