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Why Is Overflow Line Running When Filling Water Tank?

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When we start to fill our empty fresh water tank, there is two lines that come out just below the water compartment, they appear to be over flow lines. I have traced them and they also go into the coach behind the washer and have air valves at the top and turn and hook into the water system in the coach.

They are not low drains, you can hear the air drawn into them after you start to fill the tank. Its like it will pressurize the tank and drains all the water out.

Any one have an idea or have had this problem? I just call Fleetwood for plumbing diagrams.

But hope some one here has the fix.



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Larry, I'm not sure but I going to take a W.A.G. at it.

If those lines are coming from the washing machine, they could be back flow preventors,

or pressure relief valves. They might be stuck in the open position, the reason they are sucking air.

Hope this helps to point you in a direction.


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