This could be from a number of things.
Where is the leaking, front back middle? What does the tube look like, low point, dump valve, condensation from AC?
A pic from a few angels may help!
I know nothing about your model just trying to give you some tips on how to get a better response for someone who does know your model.
2015 Forest River EVO 2850
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EMS 30 PI portable w/ Edison plug
Nights Camped (2016-13) (2015-13)