Leaky

You may want to look at the sealant around the tail lights.  I looked at a used RPOD a few years ago and the unit had leaked around the tail lights for a long time and the floor was completely ruined.  

We had a leak one time. The Rpod was parked with the slide-out in. When we opened the slide-out, there was a puddle under the refrigerator. We chalked it up to the 80+ MPH winds blowing rain directly at that side of the Rpod. It's not happened a second time.

Ok, yes the leak was in the back section, opposite end of tongue. I poured water over the top vent for the fridge, as well as all around it. It didn't leak at that time.  I have several sealed areas on the roof. The fridge vent, the antennea, the solar connector, the ladder, and the seam that joins the roof and the back wall. On the back wall, I have a window, a vent that allows the hood over the stove to vent air, and my backup camera. I drenched all of those areas. I am spraying the whole roof, and looking for anything that looks like it maybe could be the cause. As far as inside, no the leak wasn't inside. It was actually winterized and had no water in the system when I discovered it. I agree with you stephen about loose plumbing connections, I had to not only tighten mine up in my 172, but I had to take the drain pipes apart, and reassemble them because they were put together so poorly, and out of alignment, and leaked. It's a really rainy day today, I will be watching for it to leak. 

MJ - Is it possible leak is internal and not external? Have you applied water to system and opened the cabinets?

I got the hose out and totally doused the entire back end with water. Not a drop of water in the camper? I squirted it from the ground, like a rain storm, then straight on, like it was a wind blown sideways rain, then I got on the roof and ran it on the roof and let it cascade over every edge. I do not understand how it was leaking quite a bit, and now not at all. I guess i'll have to do the "keep an eye on it" method.