I too have a leaking fixture on our 323BHS. I traced it to where the spray hose connects to the base of the Fixture. It is not leaking at the hot/cold fitting, it is leaking right up in the middle of the fixture. When you turn the water on, water drips down from the middle hole where the hose goes thought up into the faucet.

Going back in to get fixed.

I sometimes feel like I spend more time fixing broken crap on this trailer than I do enjoying it.