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  1. #1
    Setting Up Camp
    Join Date
    Dec 2019
    Location
    So cal
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    Water leaking from main fresh holding tank

    I thought it was my drain valve, changed that out and now it’s still dripping and filling up the enclosed underbody with water. It’s my main tank not the aux. tank. Must be close to the threaded drain valve but not the drain valve or piping connected to it as I already replaced all.

  2. #2
    Site Team WhittleBurner's Avatar
    Join Date
    Nov 2013
    Location
    Sitting in the sun! FL for along while
    Posts
    8,061
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    Have you dropped the coroplast to confirm exactly where the water is coming from?
    It may be me , but your description reads a little confusing.
    Marcy & Gary
    2014 Grand Design - Reflection 303RLS
    2022 GMC 3500 Denali Duramax Longbed SRW
    2015 GMC Denali 3500 - Retired
    2003 F350 - retired
    Michigan
    We're in trouble now, the dog are bloggin'!
    https://3dogsandatrailer.wordpress.com/


  3. #3
    Site Sponsor Buckskin's Avatar
    Join Date
    Mar 2018
    Location
    North East Georgia, 2018 Imagine 2250RK
    Posts
    703
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    Are you hooked up to city water when leaking occurs? Check to see if water is coming from overflow drain on fresh water tank by looking underneath camper. You don't have to remove plastic material to see drain line. If so your check valve on pump is not operating correctly. You can adjust; just get your pump model and Goggle to get instructions on how to adjust. Had same problem. You can also order from Amazon new plastic pump housing; not entire pump but just housing that contains check valve.
    Last edited by Buckskin; 09-22-2021 at 04:04 AM.

  4. #4
    Seasoned Camper
    Join Date
    Nov 2020
    Location
    Full Time Traveler
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    152
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    Another test is to turn off city water, turn on pump and if it cycles without water running it is leaking from a line. Just to double check...

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