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Old 05-22-2009, 12:22 PM   #1
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1959 22' Flying Cloud
Missoula , Montana
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Under Pressure

I'm starting this post in hope of learning as much about pressurized water systems of old. I would like to keep w/ this system in our 1959 Flying Cloud, so here are some questions.

-What are the major pitfalls of this system?
-Where was the compressor located typically? (my tank has a little inlet for the air on the outside of the trailer...seems weird for it to be out there)
-Is there a good source for a new air compressor similar to the old ones.
-Has anyone put in a larger compressor to use for tools and tires and such? Is there a way to do this safely so that oil can not contaminate?
-How would an in line pressure valve work and where do you get one of those?
-Does anyone have a schematic diagram or pictures of the components involved in an old pressurized fresh water system?
-While I have it apart should I treat the inside of the old tank some how.

Any help on this would be great.
Tyler
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Old 05-22-2009, 05:07 PM   #2
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The main pitfall of the system was the later model galvanized tanks tended to corrode. Less of a problem with the earlier aluminum tanks. I'm not entirely sure why the system was abandoned, but I think pressure vessel/safety standards may have something to do with it.

There was a small schraeder valve on the outside so you could pressurize it at a gas station. There was another tap on the inside which is where the compressor line was attached.

The compressor was located on the floor to the right of the tank, directly to the right of the filling neck.

You can buy a new compressor, very similar to the original. They are also used to power air horns on boats and big rigs, so they aren't too hard to find.

Yes you can use a larger compressor. If you use a diaphragm style compressor instead of a piston type you will get less oil contamination.

The pressure value is usually mounted directly on the compressor. Any pressure relay should work, even on 12 volts.

I believe I have a schematic, I'll look when I get to the office. In the meanwhile, here is a picture of the layout and the compressor.
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Old 05-22-2009, 07:11 PM   #3
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1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
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My 63 had a pressurized galvanized tank. The biggest problem I saw was the system was always under pressure, even while going down the road. If any leak occurred the pressurized air would push all the water out of the system and on to the floor while you were out of the trailer or driving. After a couple of occurrences I started bleeding all the pressure out of the system when I was not in the trailer but then the pump was so small that it took quite a time for the system to pressurize each time I turned it on. I finally converted to the on demand water pump system and that solved that problem. I still have the oil less pump in the basement somewhere. I have a bigger oil less pump for pumping up old fashion well accumulator tanks down there somewhere. They use teflon type piston rings and the oil is just in the crankcase to oil the rod ends. Some oil less pumps use diaphragm systems like the Par water pump uses.
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Old 05-22-2009, 10:54 PM   #4
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Quote:
Originally Posted by Windy59 View Post
I'm starting this post in hope of learning as much about pressurized water systems of old. I would like to keep w/ this system in our 1959 Flying Cloud, so here are some questions.

-What are the major pitfalls of this system?
-Where was the compressor located typically? (my tank has a little inlet for the air on the outside of the trailer...seems weird for it to be out there)
-Is there a good source for a new air compressor similar to the old ones.
-Has anyone put in a larger compressor to use for tools and tires and such? Is there a way to do this safely so that oil can not contaminate?
-How would an in line pressure valve work and where do you get one of those?
-Does anyone have a schematic diagram or pictures of the components involved in an old pressurized fresh water system?
-While I have it apart should I treat the inside of the old tank some how.

Any help on this would be great.
Tyler
Most owners choose to upgrade the system to "demand."

You use a plastic tank like the 64 to 67 trailers had, use a water pump, and 2 check valves.

You also drill a small hole, like 1/8 inch into the filler cap.

Now you can enjoy water whenever you wish, without the fear of the metal tank blowing because it's under pressure.

Andy
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Old 05-23-2009, 05:13 AM   #5
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Originally Posted by markdoane View Post
. . . I believe I have a schematic, I'll look when I get to the office. In the meanwhile, here is a picture of the layout and the compressor.
Couldn't find a schematic, but did find a single page system description and a diagram of the Grover air compressor. They're too large to post, send me a PM if you want a copy.
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