We live on the end of a 3/4 mile dirt road with plenty of bumps, pot holes, etc. and don't have a problem so long as I take it easy with the gas pedal. Although the trailer has plenty of clearance to the frame, our drain lines are much closer to the ground. I worry a lot more about the odd stump, log or other obstruction taking out our plumbing then dropping into a pothole. I had thought about trying to make up some kind of frame or cage to bolt up to the frame to try to protect the pipes, but it would have to be pretty heavy duty. There is another thread on the forum about putting some sort of swivel fitting on the drain lines that may be easier and more effective in the long run.