I couldn't find a plumbing section so I hope this is in the right place. After a recent camping trip we found that our sink drain hose had a cut in it from the hose clamp that secures it to the pipe that goes to the drain outside. I went to a local RV dealer and bought a piece of hose the same size and type. I connected everything the same as it was before but it still has a tiny leak. I have taken it all apart many times, even the drain under the sink and can't figure out where or why it's leaking. Any insight would be great!! The pop-up is a 2014 Rockwood Freedom 1910. The sink is the kind that flips up to use and down to close up the trailer.