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Old 09-29-2016, 08:11 AM   #1
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Fresh water tank over flow problem

problem with 2017 Jayco Eagle HT RLS 26.5. Filled tank full but lost most of the water during travel to camp site. I refilled after getting close to camp but lost most of water in a short distance. Has any one else had this problem?
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Old 09-29-2016, 08:15 AM   #2
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Everybody has this problem.


The overflow tubes are too low and LOTS of water sloshes out during transit.


A couple of 1/2" plastic valves that you close when traveling work wonders!
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Old 09-29-2016, 08:18 AM   #3
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problem with 2017 Jayco Eagle HT RLS 26.5. Filled tank full but lost most of the water during travel to camp site. I refilled after getting close to camp but lost most of water in a short distance. Has any one else had this problem?
It happens to lots of us. Not just Jayco either, I was driving down the road a week or two ago behind a Forest River 5th wheel and water was jetting out of the overflow lines.
This should get you started.
http://www.jaycoowners.com/forums/f7...ukes-3503.html
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Old 09-29-2016, 08:48 AM   #4
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Because they have a loop down they syphoned the water out the tank. Some put valves on them what is not a good idea. If possible bring them up to the vent on the portable water inlet. That's what I have done on a few.
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Old 09-29-2016, 12:26 PM   #5
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I found, that if I pull the overflow hose up as high to the underside as I can, I created a loop above the floor, and it is less likely to siphon out. I have thought about doing is connecting a Tee from that hose to rhe water inlet vent that Jayco does not use. Those breaking the potential for siphoning.
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Old 09-29-2016, 12:33 PM   #6
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Happens to me when I overflow my fresh water tank. I think I'm creating a siphon when I over fill the tank and I lose a LOT more water than the half gallon or so that I expected. These 2 overflow hoses actually already have valves on them in my case.. they are in my bathroom sink cabinet. I turn them off momentarily to stop the water loss, then open them back up again.

ETA- just had a brain fart and realized the 'valves' I mentioned in the bathroom cabinet are for the low point drains.. Jayco has them mis-labeled on my camper.
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Old 09-29-2016, 12:34 PM   #7
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Did this to ours. Or just go to my picture album.
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Old 10-08-2016, 03:47 PM   #8
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This is what I did on my T-31b. I was having the same problem. I would lose most of my water even traveling short distances.

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Old 10-08-2016, 03:55 PM   #9
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Thanks for your help
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Old 10-08-2016, 04:29 PM   #10
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I put a shut off valve on mine and re open once I have run the water for a while in the camper but mine has 2 tanks and the front one is vented near the fill. I would love to vent the rear to the front vent but haven't researched getting the vent there with the slide track in the way
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Old 10-08-2016, 04:35 PM   #11
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This is what I did on my T-31b. I was having the same problem. I would lose most of my water even traveling short distances.

Attachment 27271
Would it have been cheaper and quicker to tee the lines and install only one shutoff valve?
Our motorhome has three vent lines coming off the top of the tank. Do they make a tee for that? I guess two tees could be used with one shutoff.
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Old 10-08-2016, 04:39 PM   #12
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I did T mine with just one shut off on the rear tank. But I would still love to tie in at a point above the tank level
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Old 10-08-2016, 04:46 PM   #13
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We would also like to extend ours which is on the opposite side of the motorhome from the wet bay.
A shutoff near all the factory valves in the wet bay would probably make the most sense for ease of access and as a reminder to open it when using the tank and pump.
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Old 10-11-2016, 02:06 PM   #14
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Would it have been cheaper and quicker to tee the lines and install only one shutoff valve?
Our motorhome has three vent lines coming off the top of the tank. Do they make a tee for that? I guess two tees could be used with one shutoff.
I don't think it would have been much cheaper or easier. I didn't think about a tee. Either way it only cost a few bucks.
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Old 10-11-2016, 02:58 PM   #15
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I have 2 tanks, 2 overflow lines, and 2 small corks from Ace hardware. The corks 'live' in the cabinet with the slideout switch when they are not plugged into the overflow lines. The lines are easy to see and easy to reach with the slide IN.

Slide moved in, then put corks in; corks out then slide moves out. Having the corks and switch in the same cabinet makes it easy to remember and check.
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Old 10-11-2016, 05:50 PM   #16
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I did tee my two together and ran one section of pex back to just below the fresh water fill, where I put on a quarter turn brass shutoff valve. Now when I fill I can stand back and watch and once water trickles out of the overflow I can shut the valve and remove the fill hose. Once set up I use the overflow valve to fill dog water bowls, and once we've used some water I just leave it open.
The overflows used to be hard to see back between the tires, now its easy.
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