Originally Posted by JanelT
Thank you all. I have a 2018 Coachmen Prism. It does have the small panel under the shower that I can open (and that is how I can see water leaking from where the drain connects to the tube/p-trap). The problem is that I can't get to it to understand why it's leaking. I can get my arms in and my hand on the p-trap knob thing, but it doesn't seem to turn easily. I think I will just have to have the shower taken out to get to it.
There have been users who have complained that the hole through the floor is much larger than it needed to be. If yours is made this way, can you get to it from beneath the trailer?
You might have to remove the covering and insulation (if any) to get access. If the covering is "Coroplast" (looks like corrugated cardboard but made of plastic), some folks cut three sides of a square, pulled open the flap, worked, and taped it closed. Best to leave the front edge uncut.