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Old 07-04-2012, 08:56 AM   #1
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This question is for you experienced 5th wheel or travel trailer owners.............



I filled the fresh water tank this morning for the first time since we purchased our 2012 36RL. I previously had seen that there were a couple of blue stub water lines protruding about 4 inches through the bottom pan cover of the trailer. After filling the tank for about 22 minutes, I started observing water flowing out of the rearward tube. It continued to flow for about 10 minutes after I turned off my water supply. I assume this must be an overflow line. The second tube, towards the frontof the trailer,has a petcock valve on it, so, I assume this must be a fresh water tank drain line. Are my assumptions correct?
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Old 07-04-2012, 09:46 AM   #2
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Yes you are correct. You may also have a second overflow tube for the fresh tank.
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Old 07-04-2012, 10:17 AM   #3
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I had filled my tank and noticed the same thing ...

I then added a 1/2 cup (or so) bleach into the tank left if for a half hour or so and then drained the tank via the drain valve - as the system is both new and was pre-filled with non-toxic anti-freeze so I want to sanitize the system.



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Old 07-04-2012, 11:15 AM   #4
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Quote:
Originally Posted by KR2011
Yes you are correct. You may also have a second overflow tube for the fresh tank.


Apparently I just discovered the second overflow. I was disifecting the tank and refilling for a second time and forgot about it while I was off doing another task. When I remembered to check, two water streams were coming out the bottom of the trailer. The second is a short section of white water hose. I had thought that that hose was for the hot water heater, but, I now see that there are two other petcock valves under the water heater area.



Thanks for your response.



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Old 07-04-2012, 03:26 PM   #5
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We had a similar experience but with a different cause. The day after picking up our 2012 31SL from the dealer in April, I noticed water dripping from bottom of rv. Dealer said must have overfilled it. Continued to drip. Took it in and they found that the fresh water tank had been punctured with a screw at the factory. When the screw was backed out, water poured. Had to get a new tank (more than a week).
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Old 07-04-2012, 07:45 PM   #6
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I haveposted this question previously, also.

The part I don't understand is how the overflow tube can flow a solid stream of water for 10+ minutes afterward an overfill. Where would it store that volume of water?? Plus, water never flowed out at the inlet area as I've heard it'ssupposed to.


Is it possible that once theoverflow begins, it isactually siphoning water fromthe tank?









Hoosierguy, the petcocks you see below the waterheater are actually low-point drain vales to drain the hot and cold sides of the entire fresh water system.





Edited by: 5th_Time
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Old 07-04-2012, 09:40 PM   #7
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We wondered the same thing. Was filling the fresh water for a dry camping weekend. Guage reached full and water began flowing out the rearward overflow tube. Remove the filler hose and as you noted, a steady stream of water flowed for a long time. Checked the idiot guage and now down to 2/3. So we put the filler hose back in, but reduced the flow rate and was able to add quite a few more gallons of water and stopped before it began flowing out the overflow this time. It almost acts as if there is a check valve on the overflow tube and once tripped dumps appox a 1/3 of the water before resetting. Any thoughts from others??
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Old 07-05-2012, 07:27 AM   #8
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Quote:
Originally Posted by mhs4771
We wondered the same thing. Was filling the fresh water for a dry camping weekend. Guage reached full and water began flowing out the rearward overflow tube. Remove the filler hose and as you noted, a steady stream of water flowed for a long time. Checked the idiot guage and now down to 2/3. So we put the filler hose back in, but reduced the flow rate and was able to add quite a few more gallons of water and stopped before it began flowing out the overflow this time. It almost acts as if there is a check valve on the overflow tube and once tripped dumps appox a 1/3 of the water before resetting. Any thoughts from others??


I think was is happening is to much water pressure and or volume going into the tank. causing a lot of air pressure and pressurizing the tank. I had this problem on our last 5th wheel. if I let the water flow about half as fast, it took longer to fill, but did not loose water through the over flow or burb back through the filler.



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Old 07-05-2012, 08:31 AM   #9
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Instead of wondering where the plumbing runs or where the power lines run ... is it possible to get plumbing/electrical/HVAC diagrams from Redwood?

Surely these must be available for the factory floor ... and available for the dealer and/or end user or owner?



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Old 07-05-2012, 09:24 AM   #10
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Quote:
Originally Posted by lillyputz
Quote:
Originally Posted by mhs4771
We wondered the same thing. Was filling the fresh water for a dry camping weekend. Guage reached full and water began flowing out the rearward overflow tube. Remove the filler hose and as you noted, a steady stream of water flowed for a long time. Checked the idiot guage and now down to 2/3. So we put the filler hose back in, but reduced the flow rate and was able to add quite a few more gallons of water and stopped before it began flowing out the overflow this time. It almost acts as if there is a check valve on the overflow tube and once tripped dumps appox a 1/3 of the water before resetting. Any thoughts from others??


I think was is happening is to much water pressure and or volume going into the tank. causing a lot of air pressure and pressurizing the tank. I had this problem on our last 5th wheel. if I let the water flow about half as fast, it took longer to fill, but did not loose water through the over flow or burb back through the filler.



Lillyputz
After this quote. I went out and filled ours for the first time. can't keep tank full. the water flows out the over flow tube, will under the 2/3 mark. e-mailed Brian.
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