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water leak by furnace when city water preesure is on.

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  • water leak by furnace when city water preesure is on.

    I have a water leak only on city water. it's coming out by the furnace on the underside of the trailer. 2018 303RLS

  • #2
    Originally posted by bennettent View Post
    I have a water leak only on city water. it's coming out by the furnace on the underside of the trailer. 2018 303RLS
    Welcome to the forum! There's a plethora of plumbing gurus here (I'm not one of them)--they'll be along shortly to help you out.

    I'll take a WAG at it, though--the leak is coming from the black tank flush valve behind the shower wall.
    Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.

    Howard, 2017 Ford F-350 DRW, '19 315RLTSPlus

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    • #3
      Originally posted by bennettent View Post
      I have a water leak only on city water. it's coming out by the furnace on the underside of the trailer. 2018 303RLS
      Since this leak appears when on city water, I doubt that it is the black tank flush vacuum break . . . but, it could be the water connections to the shower faucets which are also directly above the furnace. Are you sure that this only happens when on city water pressure? If it does not happen when the system is pressurized by the on board pump, we will have to look for another reason specific to city water supply.

      If you pull the bottom two drawers in the kitchen buffet, you will be able to see the furnace. Using a flashlight, look for water on the metal furnace box. This would indicate a leak from the shower faucets above. If the box is dry but the floor under the furnace is wet, the water is more likely coming from the Nautilus water panel area and running across the floor to the furnace area. Another possible source is the water heater. This is the white foam box that you can see by opening the lower left door in the buffet.

      The shower faucet connections are accessed by removing the small panel below the faucets, in the shower.

      Rob
      Cate & Rob
      (with Border Collies Molly & Angel and their kitty Gracie)
      2015 Reflection 303RLS
      2014 Ecoboost F150 with Heavy Duty Payload Package
      Whitby, Ontario, Canada

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      • #4
        Thanks for the ideas, I will look closer tomorrow and hopefully fix it. Will let know how it turns out!

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        • #5
          Well, after tearing into the trailer I found the backflow valve on the water heater to be the leak. It seems to be the plastic valve that comes out of the hot water tank. The pex line in is good, but the fitting is leaking at the tank bung. Tried to redope it and install it, but it still leaks. Ordered a new one...
          Thanks for the help!

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