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Old 03-14-2016, 07:59 PM   #11
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Meant to say "does" have an overflow on the bottom
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Old 03-14-2016, 08:18 PM   #12
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Meant to say "does" have an overflow on the bottom
Have you actually seen the water come out of the overflow hose when filling the tank. It almost sounds like you see an overflow tube, but it may not actually be properly inserted in the hole at the top of the tank.
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Old 03-14-2016, 08:54 PM   #13
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I found a similar problem on another person's tt that we decided was caused by filler connection that was not aligned. No more problems after removing and reinstalling filler neck.
I am surprised you don't have a visible overflow. I would look for that again. My former tt had a cap on it so that it looked just like the drain. I had to remove it so it would function. If you don't find it check with dealer
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Old 03-15-2016, 12:13 AM   #14
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Check both the fill and overflow return tubing to the water tank.

On my last camper, the overflow was cut a little too short and the tubing was very tight and when things warmed up, the tubing came off the tank slip on fitting causing a similar issue.

Fill tank and observe what happens after you take a look at it. Have a buddy help by filling while you watch.

If no obvious issues with fill and overflow tubing and connections then by all means drop the tank to see if some knucklhead at the factory screwed a floor screw into the top of your tank. This is not a rare problem.

Lastly, make sure you inspect, with buddy help, all drainage. Every caper I have owned has had improperly secured/connected drain fittings. Last one never had the drain for tub connected and it was draining unto my coroplast bottom liner and seeping out the sides. Since we don't use much water showering, it took a while for us to catch this issue...thank God no water damage to floor.

Good luck!
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Old 03-15-2016, 10:13 AM   #15
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I fill up because there is no place to do so without paying $1.50 a gallon. Its only when I go to the race track. Its pretty much a large field. I don't typically run with water

My rig doesn't has an overflow out the bottom, the hose has a screw in connection. i have to sit and watch the gauge inside and tell the wife when to shut it off.

It definitely is fresh tank related and has to have something to do with going down the road, because once in place there are no issues. i am just trying to save myself from dropping the belly and the tank to look at it if there really isn't a problem.

Thanks for everyones help and ideas
I thought all FW tanks have an overflow connection. I might be as simple as a short piece of hose screwed into the top of the tank that is suppose to run to the ground. There is no need for a valve on the overflow but if it does have one make sure it is open. My FW tank has a hose fitting also but I never use it. Pick up or make this fitting.

http://www.amazon.com/Camco-40003-Water-Filler-Shutoff/dp/B0006IX850/ref=sr_1_11?ie=UTF8&qid=1458050950&sr=8-11&keywords=fresh+water+tank

This slips into the pipe and when the water backs up you shut it off. No need to stand inside and watch anything. Costs less than 5 bucks and well worth it!


Here is a thought. Fill the tank then open the drain and drain 5 or 6 gallons of water. This will remove any pressure and if it is coming from the overflow for some reason it should drop the water level enough to prevent it from leaking. Go for a ride and if your floor stays dry then you will know it is coming from the top of the tank for some reason.


Jim
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Old 03-15-2016, 10:18 AM   #16
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Cut a 3 sided trap door and take a look....not gonna fix it-self, then use tape to reseal..the bottom 'cover' isn't water tight in the first place and not a structural member.....this trailers freshwater overflow is combined into filler neck and doubles as a vent
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Old 03-15-2016, 10:38 AM   #17
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Cut a 3 sided trap door and take a look....not gonna fix it-self, then use tape to reseal..the bottom 'cover' isn't water tight in the first place and not a structural member.....this trailers freshwater overflow is combined into filler neck and doubles as a vent
So it could very easily be leaking where it comes out of the tank at the top.

Bob, got a question. If he is screwing the hose on to the fill fitting wouldn't the tank be under pressure when it became full because the water can't come out the overflow, right? This is because the overflow is going into the fill tube and would have no place to go. If this is the case the filler tube fitting I recommended above should fix the problem. When the tank is full the water backs out of the filler tube.

Jim

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Old 03-15-2016, 11:13 AM   #18
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Should work like you said........if air pressure was injected into visible end of overflow hose, and the hose was connected at tank, should be able to hear the air mak'n bubbles in tank or make it leak, after filling tank
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Old 03-15-2016, 11:25 AM   #19
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Wifi here at campground very spotty.....I would apply air to visible end of overflow hose, with a full tank, and see if I could water coming out.......then, if needed, cut away.....your solution should work if everything is 'hooked' up.....I just like to look! lol
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Old 03-15-2016, 11:27 AM   #20
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2 posts......said it was 'spotty'.....lol
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