Fresh water tank magically fills itself
We have 2001 34' jayco 5th wheel. We've had it for several years. Driven all over the US in it. Suddenly the fresh water tank magically fills itself. Disclaimer, I'm more than a handy guy. The only wa...
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I think this may already have been covered in a few of the above comments.
There's only two ways to get water into the fresh water tank.
One, you connected one end of a hose to city water and the other end to the fresh water tank fill port. This is the normal way to fill the water tank.
The second way, which should not happen, is you're connected to city water and the check valve in the water pump is leaking and allowing water to back flow into the fresh water tank.
It isn't any more complicated than that.
So base on what you have posted, the check valve in the water pump is leaking.
If you don't want to replace the water pump then just put a check valve in the water line on the input (suction) side of the pump. Make sure you point it in the correct direction.
Let us know what you decide to do.
There's only two ways to get water into the fresh water tank.
One, you connected one end of a hose to city water and the other end to the fresh water tank fill port. This is the normal way to fill the water tank.
The second way, which should not happen, is you're connected to city water and the check valve in the water pump is leaking and allowing water to back flow into the fresh water tank.
It isn't any more complicated than that.
So base on what you have posted, the check valve in the water pump is leaking.
If you don't want to replace the water pump then just put a check valve in the water line on the input (suction) side of the pump. Make sure you point it in the correct direction.
Let us know what you decide to do.
