Fresh water tank overflow

[zman]

When I am hooked up to city water with the valve on city water my fresh water tank will over flow. I am assuming that the fill/city water valve is leaking through when its on city water and causing water to flow into the fresh water tank.Does this sound logical?

[zman]

When I am hooked up to city water with the valve on city water my fresh water tank will over flow. I am assuming that the fill/city water valve is leaking through when its on city water and causing water to flow into the fresh water tank.Does this sound logical?

[Diplomat Don]

zman....Without looking at mine, I think the two positions are "City Water" and "Fill". Two things.....when you say it fills your fresh tank are you talking about a matter of minutes or days. If it's minutes, the labeling/connection to the valve may be backwards. If it's taking days, the valve probably has a slow leak.

I'm not sure if it's possible, it could also be a leak in the water pump seal/valving and it's allowing city walter to back flow through the pump and back into the tank. Good Luck

[zman]

My tank was about 3/4 full when i hooked up at a campground. After about 24 hours I noticed water running out of the fresh water tank lid.I opened the lid and it was so full it was like a fire hose until the bulging side where able to regain their normal look. So I think water is slowly running past the valve and over filling the tank. Any advice would be awesome.

[BigSkyBob]

I would disassemble the output connection from the valve to see if it's leaking past the "City Water" position and if so, clean or replace the valve.