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  1. #1
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    Fresh water Tank venting continuosly

    On our Reflections 150 Series 230RL We filled the Fresh Water tank until water flowed from the Overflow/Vent Line.We checked the Tank Level from the Monitor and it read 100%. We disconnected and drove 45 mins to check in at the State Park. Once set-up at our camp site we checked our Fresh Water Tank Levels and the Tank was @ 1/3 . All of the Valve’s were set for Dry Camping as outlined on the Nautilus Controller when we left the Filling Station. What is our issue ?

  2. #2
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    Siphoning from the overflow.
    John & Kathy
    2014 F250 Lariat FX4 6.2L SBCC
    2014 Reflection 303RLS
    SW Indiana

  3. #3
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    As @jkwilson said, you are losing water because it is being siphoned from the fresh water tank by the overflow valve. I had the same issue, put a shut off valve on the overflow line.
    https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
    The downside is you have to open it when filling and using the freshwater tank and close it when traveling to prevent the siphoning. I have read that if you use the pump to draw water from the fresh water tank with the valve closed you could "implode" the tank. I wouldn't think the pump is that strong but who knows.
    I think it is annoying that GD did not take this into account when designing/building their trailers.
    Good luck and welcome to the forum.
    2021 Imagine XLS 22RBE
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  4. #4
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    Quote Originally Posted by alias100 View Post
    As @jkwilson said, you are losing water because it is being siphoned from the fresh water tank by the overflow valve. I had the same issue, put a shut off valve on the overflow line.
    https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
    The downside is you have to open it when filling and using the freshwater tank and close it when traveling to prevent the siphoning. I have read that if you use the pump to draw water from the fresh water tank with the valve closed you could "implode" the tank. I wouldn't think the pump is that strong but who knows.
    I think it is annoying that GD did not take this into account when designing/building their trailers.
    Good luck and welcome to the forum.
    If the check valve in the pump fails while hooked to city water or you attempt to power fill the tank, the tank can inflate and fall out of the trailer if such a valve is closed. I’d reconsider a valve on the overflow. GD has switched to a dual overflow so the siphon is broken.
    John & Kathy
    2014 F250 Lariat FX4 6.2L SBCC
    2014 Reflection 303RLS
    SW Indiana

  5. #5
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    Thanks to everyone who has responded. It is so comforting to know I have each of you and your knowledge to rely on. You are the Best !!

  6. #6
    Site Team Second Chance's Avatar
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    James,

    After I have filled the tank, I set the valves to "Dry Camping" and run the outside shower (using the pump) to pump water out of the tank until the siphoning stops. Doing this breaks the siphon (fills the overflow tube with air again) and we don't loose any water afterward.

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    Rob
    U.S. Army Retired
    2012 F350 DRW CC LB Lariat PS 6.7
    2020 Solitude 310GK-R, MORryde IS, disc brakes,
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    (Previously in a Reflection 337RLS)
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  7. #7
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    It is good to know that GD has addressed the siphoning issue. I had not considered the backflow issue, but as the only time the valve is closed is when I am traveling I will stick with the shutoff valve. Thanks for the warning though.
    2021 Imagine XLS 22RBE
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  8. #8
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    We suffered through the same anomaly until I read, and re-read, the reasons a tank starts syphoning when it is too full. Ever since I educated myself we now leave with about 2/3 tank of water and arrive at our destination with close to the same amount (allowing for water usage along the way).
    It is far cheaper, and much less labor intensive, than installing extra shut-off valves.
    Last edited by marine6805; 05-25-2024 at 04:58 PM.
    2018 RAM 3500 MC, CTD 6.7, 68RFE
    (2nd RAM MC w/CTD 85K Hitch Miles)
    2019 Imagine 2250RK, replaced hail destroyed BH (Brand X) in 2019.

  9. #9
    Setting Up Camp hhanson's Avatar
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    @ Second Chance

    After I have filled the tank, I set the valves to "Dry Camping" and run the outside shower (using the pump) to pump water out of the tank until the siphoning stops. Doing this breaks the siphon (fills the overflow tube with air again) and we don't loose any water afterward.
    Nice tip!
    Taz (Vizsla)-- Lead Dog
    Steve and Karen-- Team
    >>>-------------------->
    2017 Ford 350 6.7 DRW
    2018 GD 328 Momentum

  10. #10
    Seasoned Camper
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    Here’s a pic of how the dual tube, anti-siphon arrangement is constructed, if anyone is curious. The port is on the upper side of the tank, so they elbow up above the tank and then over to two down tubes.

    Click image for larger version. 

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    Sorry the pic is (always) turned on it’s side.
    Larry and JoAnna
    ‘23 Chevy 3500HD CCLB DRW High Country 6.6L Diesel, ‘22 Solitude 310GK-R, Hensley BD5
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