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  1. #1
    Site Sponsor Scocciante's Avatar
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    Water in Underbelly

    Last year I climbed in behind storage aria to replace pump lines and clean up wires spent several hours checking out everything.
    Spotted what looked like a leak that had dried up between the Black and Kitchen Grey tanks Isolation showed old water marks.
    Checked Periodically All was well all year .Winterized everything Flushed all tanks drained all in October .Yesterday Went back in to checkout location for Inverter.
    Found Water frozen in under belly about two feet round circle same spot. felt around as far as I could tanks dry. Now my Question is how are the plastic pipes connected
    to the tank because the cold is affecting something causing it to leak . ??? Your input would greatly be Appreciated.
    2020 Grand Design Solitude 344GK
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  2. #2
    Commercial Member huntr70's Avatar
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    Most of the plumbing to the tanks is a rubber gasket, slip fitting.

    The discharge lines are glued.

    Have you overfilled tanks at all? they can, and will lose fluid out the rubber slip fitting when overfilled.
    Steve- Inventory Manager at Tom Schaeffer's RV, Shoemakersville, PA www.tomschaeffers.com
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  3. #3
    Site Sponsor Scocciante's Avatar
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    Never overfilled Drained and flushed in fall, this started when it got cold Shrinkage maybe
    Last edited by Scocciante; 01-13-2021 at 08:26 AM.
    2020 Grand Design Solitude 344GK
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    MORryde pinbox
    2007 GMC Topkick C5500 Duramax 6.6
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  4. #4
    Rolling Along
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    The only thing I can add to the water in the under belly is based on our 2015 305RE. I removed the coroplast to inspect the appearance of sagging coroplast. What I found was the insulation was damp from water infiltration. I thoroughly check all the connections, but did not find any leaks. In checking other possible sources, it appeared to me the most likely source was where the hydraulic rams went through the I beam to move the slides in and out. There is a hole about 3" diameter where the shaft goes through. My thought is that when towing in the rain a considerable amount of water could enter that area. Also, the same could be true for the two channel guides for each slide, although those are not as large an area as the ones for the hydraulic rams.

    My solution is to fabricate some type of rubber seal, which will allow the shaft to move back and forth, but cut down on water in filtration.

    Gordon Fuchs
    Gordo Fuchs
    Northfield, Ohio 44067
    2015 305RE Moryde I/S, Electric/hydraulic disc brakes
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  5. #5
    Site Sponsor Scocciante's Avatar
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    Mouse proofed those holes long ago. This problem is happening in the winter when it is cold It was dry in October when winterized and has not moved.
    Starting to lean toward those couplers on the tank.
    2020 Grand Design Solitude 344GK
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  6. #6
    Site Sponsor Scocciante's Avatar
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    Took the bottom down today Found the leak.
    Attached Thumbnails Attached Thumbnails IMG_0252D.jpg  
    2020 Grand Design Solitude 344GK
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  7. #7
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    I thought you said your tanks were empty? Could the be condensation?
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  8. #8
    Site Sponsor Scocciante's Avatar
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    In Some non plumbers infinite wisdom everything is pitched backwards about an inch. That coupled with Residual water from all tanks = Leak at lowest point bad fitting. The Hose connection seems to be pulled up to tight causing the problem. I Will fix
    2020 Grand Design Solitude 344GK
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  9. #9
    Rolling Along
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    Quote Originally Posted by Scocciante View Post
    Took the bottom down today Found the leak.
    What fitting are we looking at ?

    Gordon Fuchs
    Gordo Fuchs
    Northfield, Ohio 44067
    2015 305RE Moryde I/S, Electric/hydraulic disc brakes
    2008 Dodge Ram 3500 Cummins

  10. #10
    Paid my dues 😁 FT4NOW's Avatar
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    Quote Originally Posted by gordofuchs View Post
    What fitting are we looking at ?

    Gordon Fuchs
    That's one of the dump valves. Cant tell which one by the picture. I'd guess a gray tank since it looks like it is smaller than the pipe behind it. One of the gray tanks on my 399 was plumbed in a similar fashion.

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