I'm not sure. But I'm real glad that it did not happen when I started with the black tank!!!! As the gray was emptying, I could actually hear the sewer pipe thing sound like it was filling up. I thought, no way...
We just got the hell out of there fearing that the entire campground was going to form a gigantic sink hole.
We did try to let the camp owner/host know, but he was gone. Probably at a Flying J to dump his tanks...
Here's our site...
Sometimes I wish I were living in the stone age. Then I would know I'm the smartest person in the world.