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  #1  
Old 09-19-2020
Butch Charpentier Butch Charpentier is offline
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Default Water in air system

For years I've had water in my air system. If I plug into the system to inflate a tire or use an air tool I get water spraying out. I've replaced the air dryer several times and put in a new engine air compressor and drained the tanks periodically to no avail. Has anyone else had this problem and cured it?
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Old 09-19-2020
TOPHAT1 TOPHAT1 is offline
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Hey Butch, do you have an Air Purge switch in your water bay? If so, you could have a leaky valve, which would allow water to be pushed into your air lines. Most Woggers have disconnected the Air Purge or put a quarter turn valve to isolate the two systems.
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Old 09-19-2020
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I agree with Gunner on this. The air purge could be your issue. There have been lots of issues of water in air system because of that set up. I think the best idea is to disconnect the air purge completely. If you want to blow out the water system to winterize get one of these

https://www.etrailer.com/RV-Fresh-Wa...23518LFVP.html
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Old 09-19-2020
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I agree,the air purge check valve is bad,a ball valve or pipe plugs are in your future.
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Old 09-19-2020
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Any pictures of this?
I'm not sure what is being discussed.
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Old 09-19-2020
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Quote:
Originally Posted by Hellcat View Post
Any pictures of this?
I'm not sure what is being discussed.
On my bus and maybe yours too, out in the water bay there may be a toggle switch, marked Air Purge. This was set up by Bluebird to purge the water from the pluming system of the bus to winterize. Since it is directly connecting the air and water systems of the bus, if that valve fails you get water in your air system. Not good. That is what is being discussed. The info should be in your owner's manual also.
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Old 09-19-2020
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Quote:
Originally Posted by Butch Charpentier View Post
For years I've had water in my air system. If I plug into the system to inflate a tire or use an air tool I get water spraying out. I've replaced the air dryer several times and put in a new engine air compressor and drained the tanks periodically to no avail. Has anyone else had this problem and cured it?
I don't know if this could apply to your coach but an auxiliary air compressor, plumbed into the system after the air dryer, can also put water into the air system.
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Old 09-19-2020
al perna al perna is offline
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Butch , What do you mean by water in the air system ? Have you removed a PPV or another device and found rust ? Just curious as i know you know what you doing .
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Old 09-19-2020
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Air has moisture in it (i.e. humidity). That's the reason for the main dryer and other smaller ones like in the steer bay by the Norgrens in your Prevost.

As John correctly pointed out, aux compressors without inline air dryers also have issues introducing moisture into the air system.

If Butch hasn't plumbed out or valved out the air purge I bet that's his problem though, back feed of water into the air system.
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Old 4 Weeks Ago
Butch Charpentier Butch Charpentier is offline
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First of all the air purge system was plumbed out years ago. I think John may be on to something though. It came from the factory with a Gast aux compressor already plumed in so I did not suspect that to be the problem. I have rebuilt several of them and never seen any signs of water. I am wondering if I were to plumb in an water purge system immediately after the aux compressor, do you think that might do the trick?
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