Fresh water tank filling up when connected to city water

[Crshamp]

We took our 2013 Primetime tracer 3200 for the first time this year this past week. We hooked up to the city water and sewer. Three days in I found our fresh water tank leaking from the fill up spout. The tank was empty when we started. And ideas? This is the first time we have owned this kind of TT so this is all new to us.

Any help would be great. Thanks

[Toddupton]

Bad check valve on your water pump. You can try to turn the pump off and on a few times and see if it flushes out

[dieselguy]

If you have a city water / gravity fresh water valve used to power fill your FW tank ... it may me leaking past when in the city water position. Or ... Perhaps the check valve in your pump leaks.