Check valve failure
I had my what I think is first real part failure since I purchased my 2013 26RLS. The inline check valve for the black tank flush started leaking a little when using the flush. Given the location of the valve in relation to the tank, I'm comfortable that it was only clean water that leaked and my socks, in a plastic container, were right below the valve so they were the only thing that got damp.
Not bad considering that I am into my 5th season with the trailer.
2013 Jay Flight RLS
2014 Ford F250 Super Duty
Reese HP Dual Cam