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Goostoff's avatar
Goostoff
Explorer
Sep 06, 2019

fresh water tank overflow syphoning tank dry

Let me start by stating that my overflow in a tube sticking out the bottom of the underbelly of the trailer. I have always just filled my tank untill water starts to flow out of the tube. It would always drain off the little bit that got in before I could pull the hose. For some odd reason this year when i do this the water will sit there and keep running out and will syphon the tank nearly dry before it stops running. Anyone have any idea what is going on. I'm thinking about installing a valve on the end but I fear that I would forget to open it and make even more problems

33 Replies

  • I have the same issue and I have valves on the ends of my vent and overflow pipes.
    Yes you must remember to open valves.
    Just make opening valves part of your setup routine
  • It can only siphon to the level of the opening inside of the tank. It sounds as though the tube is no longer at the top of the tank, but is now at the bottom.