Here's the verdict. Using the gray water tank almost full time for showers and washing, we can go for about three days before the gray water tank overflows. We dumped it Thursday afternoon in South Carolina, and this morning the bathtub drain backed up.
I was thinking that maybe somehow rain water might be making its way into a tank with a crack on top or something, but we haven't had any rain.
I'm really at a loss here. It isn't a problem here in Florida because I can just dump it on the sandy ground, but I can't travel like this.
I should crawl under the RV and try to find the gray water tank. Maybe tomorrow, running errands today. Maybe that will give me some ideas.
I wonder if the tank could be half full of crud? That might do it. I should flush it out somehow.
