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Old 08-04-2021, 09:19 AM   #1
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1972 27' Overlander
Canby , Oregon
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Wheres the Water!!!???

Howdy! I am the recent owner of a 1972 Overlander Double 27. I bought this trailer as a mostly original and Im working condition project. I wanted to test out the plumbing and see how everything works and make sure there are no leaks but after filling the onboard tank and not getting anything using the water pump, as well as hooking up the hose for shore water and still nothing. So at this point Im at a loss.
Is there a simple main valve that Im missing?
Ive located what I believe to be all 5 valves on the trailer. 3 under the sink, one of them being the onboard tank drain valve. Then 2 in the rear which I think have to do with the water heater.
Any information will help, Im brand new to the airstream world so Im here to soak in as much information as possible.
I can post pictures if need be as well.
Thank yall!
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Old 08-04-2021, 10:03 AM   #2
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There should not be a factory installed main valve>
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Old 08-04-2021, 11:47 AM   #3
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So in theory, if all valves are open water should be running through the system, correct?
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Old 08-04-2021, 01:02 PM   #4
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Yes, If you don't get water at the faucet remove the strainer on the faucet and see if it is clogged.

When you try to run off the fresh water tank does the water pump shut off or keep running?
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Old 08-04-2021, 01:40 PM   #5
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Hi

No water with shore water hooked up could easily be a pressure regulator or back flow preventer that's rusted shut.

Bob
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Old 08-04-2021, 02:02 PM   #6
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Pump keeps running.
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Old 08-04-2021, 02:03 PM   #7
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When hooked up to shore water, it does seems to leak somewhere right near the back, so that could make sense with a excess of pressure because of blockage.
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Old 08-04-2021, 09:25 PM   #8
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1972 27' Overlander
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Quote:
Originally Posted by uncle_bob View Post
Hi

No water with shore water hooked up could easily be a pressure regulator or back flow preventer that's rusted shut.

Bob
Would those be in the rear, close to where the shore water goes in?
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Old 08-05-2021, 11:26 AM   #9
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Quote:
Originally Posted by CooperN. View Post
Would those be in the rear, close to where the shore water goes in?
Hi

They often are, but AS just *loves* to move things around ....

On an older RV, who knows what may or may not have been done over the years. An RV that did not have a pressure regulator when new could easily have had one installed at some point in the last 50 years .....

Bob
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Old 08-07-2021, 03:27 PM   #10
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1972 27' Overlander
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Update

Quote:
Originally Posted by uncle_bob View Post
Hi

No water with shore water hooked up could easily be a pressure regulator or back flow preventer that's rusted shut.

Bob
Howdy!

After tinkering and tinkering, I have FINALLY gotten water to all faucets, shower, and toilet via the onboard tank and pump. I believe the pump was probably air locked. So that is the good news.

Bad news is that I still do not have any water via the shore water inlet. I think my best bet would probably be, like Uncle Bob said, that either the regulator or the back flow preventer have rusted closed, or almost fully closed.

My question now is what would be my best option for restoring water from the shore inlet? Do I try to cut out the old regulator and back flow device and bypass with a modern one? Are there any tips or tricks to get them to work again so I can avoid chopping and patching pipes altogether?

I appreciate all the help thus far and thank you for any future help!

~ Cooper N.
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Old 08-07-2021, 04:27 PM   #11
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If you cut out the pressure regulator you could easily replace it with a screw on regulator on the outside inlet.
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Old 08-08-2021, 07:55 AM   #12
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Hi

I'm not a big fan of "abandoning" chunks of plumbing. It tends to come back to haunt you later ..... I'd poke around (possibly with an inspection camera) and work out what's where.

A randomly selected example from Amazon:

https://www.amazon.com/Dual-Cameras-...8430871&sr=8-3

Bob
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