I hope it isn't too much out of line to tell a toilet overflow story.
Back in 2004 we had our daughter and granddaughter with us in our new-to-us motor home in Wisconsin. We had attended the big show at Oshkosh and pulled into a grass RV park to let the gals tour the dairy farms in the region. They took off in the toad and I stayed behind to take care of a few things. It turned out to be a lucky thing that I did. The park had water and electricity but the sewer dump was down at the end. After a while I went inside and realized the carpet was so wet it was nearly floating. A quick survey told me that the toilet valve had stuck and ran until the tank was full, overflowed into the heater vents until they were full, and was slowly trying to fill the whole place up. I got the valve shut and opened the basement doors and the low spots were full of water so I piled everything out on the grass. Next pulled the registers and drilled holes in the vents to let the water drain out of them. When I finally got everything halfway straight I fired up the coach to drive down to the sewer dump to empty the tank. When I got back up to park in our space the guy next door was laughing. He said that when I pulled out and turned the corner water was pouring out every basement door.
Fortunately it was a hot day in Wisconsin and we got everything dried out, eventually. I was also glad that we had started with a pretty empty tank so the water wasn't as foul as one might think. At least it was well diluted with a couple hundred gallons of fresh water