Forum Discussion
Chris_Bryant
Sep 30, 2015Explorer II
cannesdo wrote:
When the water is running water runs out a tube underneath in the back which piggy-backs (off the side) of the black plastic hub the sewer hose is attached to (right where the hub enters the trailer (plywood plank). Is that the gray water exit? No idea how Airstream plumbing works.
That is a pressure relief valve- it has failed. The usual fix is to unscrew the drain pipe from it and cap with a (IIRC) 1/2" flare cap. You can replace, but I never have, as it involves dealing with torches and solder.
We also can't find any kind of sewer valve so my guess is there isn't one. Is just essentially open all the time? Are there any tanks at all? Fresh water? Black? Gray?
A 1970 had fresh and black tanks- no gray tanks. There should be a valve on the black tank- it is usually right at the tank with an extension rod to the outside.
Next question...the two valve knobs in the rear external compartment and the one inside by the water heater. What do those control? Anyone have a similar set-up?
Those are darin valves for the water system- hot and cold and probably fresh holding tank.
And we found a gas valve that comes out the side -- is that for some kind of external bbq or something?
That is probably from an appliance that was removed- they have external valves on all LP appliances.
I have the factory service manual for 1972, which should be similar. The manuals from that era have *everything*- every plumbing fitting, ever appliance. If you find the serial number on the plate beside the door, you can find out more about it- exact model would help.
On edit- here's the plumbing diagram for the 1972 27, 29, and 31 foot models. Click for larger.
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