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Old 07-24-2016, 10:31 PM   #1
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Water In Underbelly

Just returned home last night from two week trip to Black Hills, Yellowstone, and Tetons. Great trip overall. Unfortunately, while checking things out on one of our many stops, during the return, I found the dreaded sagging underbelly (on the axles) with water dripping. I poked a hole in it and let it drain the rest of the way home and pulled the underbelly off this evening. Thinking I would likely have a fitting leak at the fresh water tank, I filled it up but found nothing. I then proceeded to fill all the holding tanks completely full and pressurized everything. Still no apparent leak. I'm kind of stumped. We did drive through some rain coming home but I can't imagine this amount of water getting inside. My only other idea is that I had a roof vent stack cap off for an uncertain amount of time. Pretty certain it was the one for the black water tank. There was a bit of a gap around the pipe. Perhaps that might be it? Anyway, any input is appreciated.

One additional tip... On my way out, I lost a bolt out of the rear leaf spring perch on the back axle. Discovered it when we pulled into KOA in Rock Island, IL. Mine has the Correct Track system with the yellow cams. The bolt and cams were all missing. Was lucky enough to find some ancient Correct Track parts at Cheyenne, RV (Great folks!) by the World's Largest Truck Stop. They weren't exact fit but, after a trip to Lowes for a jack, I was able to get both wheels on that side off the ground and get things lined back up and safe.

Here's the tip. Check all the bolts if you have this set up. I put a wrench on the remainder of mine and all could be tightened. They weren't necessarily loose but could be tightened.

I will try to find the correct part for mine this week.

Thanks for any input on the water thing.

Jeff
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Old 07-25-2016, 09:23 AM   #2
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Originally Posted by Mainous View Post
Just returned home last night from two week trip to Black Hills, Yellowstone, and Tetons. Great trip overall. Unfortunately, while checking things out on one of our many stops, during the return, I found the dreaded sagging underbelly (on the axles) with water dripping. I poked a hole in it and let it drain the rest of the way home and pulled the underbelly off this evening. Thinking I would likely have a fitting leak at the fresh water tank, I filled it up but found nothing. I then proceeded to fill all the holding tanks completely full and pressurized everything. Still no apparent leak. I'm kind of stumped. We did drive through some rain coming home but I can't imagine this amount of water getting inside. My only other idea is that I had a roof vent stack cap off for an uncertain amount of time. Pretty certain it was the one for the black water tank. There was a bit of a gap around the pipe. Perhaps that might be it? Anyway, any input is appreciated.

One additional tip... On my way out, I lost a bolt out of the rear leaf spring perch on the back axle. Discovered it when we pulled into KOA in Rock Island, IL. Mine has the Correct Track system with the yellow cams. The bolt and cams were all missing. Was lucky enough to find some ancient Correct Track parts at Cheyenne, RV (Great folks!) by the World's Largest Truck Stop. They weren't exact fit but, after a trip to Lowes for a jack, I was able to get both wheels on that side off the ground and get things lined back up and safe.

Here's the tip. Check all the bolts if you have this set up. I put a wrench on the remainder of mine and all could be tightened. They weren't necessarily loose but could be tightened.

I will try to find the correct part for mine this week.

Thanks for any input on the water thing.

Jeff
31fqsl
M, it sounds like your belly pan is different than mine. I have coroplast and no insulation above other than what I stapled to the floor. The vent stack cap off in the rain should just run into a tank not the belly. I wonder if you might have filled the FW tank and experienced that auto siphon situation? Which would also mean the overflow was not extended below the belly. Also, when I installed Dexter EZ Flex, I found some bolts not all that tight. I torqued them and will check again. Thanks for the tip.
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Old 07-25-2016, 10:31 AM   #3
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If you're saying there was space around the stack pipe, as in no caulking between it and the roof membrane, that's the first area I'd suspect was leaking.
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Old 07-25-2016, 10:44 AM   #4
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Wow, and hear I thought I only had the water in the belly anomaly. Mine happened while on site getting another minor repair done. Woke up in the morning and the belly was sagging. Techs came out, drained and we checked everything that we could think of and came up dry. Has not happened since. This was about 5 months ago and we've spent at least 30 nights in the camper.
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Old 07-25-2016, 11:37 AM   #5
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I have to say, after reading some other posts about the insulation and such in the underbellies, I was actually a bit impressed with what I found. On top of the corrugated pastic was a 4" layer of insulation covered by a layer of foil. Mine does have the weather package. There is also a padded layer of insulation attached directly to the floor as well. On the other hand, every one of the heat pads were partially peeling from their respective tank and the hose going between the fresh water tank and the water pump was actually coiled a couple times and would never drain properly.

I wanted to get in that cavity at some point to get an overall view of the plumbing and wiring anyway. I just hate being forced and will be really aggravated if I take measures to tidy it up and seal it well only to have this happen again.

Regarding the stack, yes it is properly sealed to the roof membrane and caulked down. The gap I speak of is between the actual stack pipe and the flange it pokes through below the cap. Some moisture would have went down the stack for sure but some could have gotten between the pipe and flange and ran down the length of the pipe. My drain and vent protrude well below the surface of the underbelly.

Thanks for the input.
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Old 07-25-2016, 12:12 PM   #6
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I had the sagging belly and there was two culprits one being the overflow drain hose was never pulled out and it was tucked into the under belly and the second being that the plastic was not sealed all the way around the edge so driving through any rain storm was filling the belly up. I had the same thing happen to my 29 hfs and when I sealed it no more problem.


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Old 07-25-2016, 04:04 PM   #7
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Originally Posted by Mainous View Post
Just returned home last night from two week trip to Black Hills, Yellowstone, and Tetons. Great trip overall. Unfortunately, while checking things out on one of our many stops, during the return, I found the dreaded sagging underbelly (on the axles) with water dripping. I poked a hole in it and let it drain the rest of the way home and pulled the underbelly off this evening. Thinking I would likely have a fitting leak at the fresh water tank, I filled it up but found nothing. I then proceeded to fill all the holding tanks completely full and pressurized everything. Still no apparent leak. I'm kind of stumped. We did drive through some rain coming home but I can't imagine this amount of water getting inside. My only other idea is that I had a roof vent stack cap off for an uncertain amount of time. Pretty certain it was the one for the black water tank. There was a bit of a gap around the pipe. Perhaps that might be it? Anyway, any input is

Jeff
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Did you use your black tank flush during this trip?




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Old 07-25-2016, 05:21 PM   #8
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my old Greywolf 21RR had a factory screw into the shower drain between shower and gray tank. It was hard to find since it leaked only when using the shower, BTW
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Old 07-25-2016, 06:15 PM   #9
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I did and I used it to fill the tank when testing for leaks. I didn't see anything there. After seeing egladden's response, I'm leaning towards it being from driving in the rain. The rear edge was not sealed very well at all and the tire spray likely got in there.
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Old 07-25-2016, 06:41 PM   #10
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I did and I used it to fill the tank when testing for leaks. I didn't see anything there. After seeing egladden's response, I'm leaning towards it being from driving in the rain. The rear edge was not sealed very well at all and the tire spray likely got in there.

Did you have the black tank drain valve close while using the black tank flush? I had a similar issue while doing this on the same unit as yours.




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