Originally Posted by Bill

I'm glad this worked - but I'm also surprised. Presumably the water flowing into the tub went down the tub drain, into the gray water tank, and then out through the Slinky hose and into the campground sewer connection? The thing I would worry about (and have experienced, in Grants, NM) is that some of the trickling water flow in the Slinky will freeze, gradually building up a layer of ice inside the hose. Eventually the ice builds up to the point where it totally blocks the hose - and then things get interesting.

When I did this in NM, the campground owner happened by as I was disconnecting the Slinky in hopes of finding a way to thaw it. He warned me not to pick up the hose, saying that a frozen hose is locally known as "horns", because it is common to see a camper with a frozen hose over his shoulders (looking like a longhorn), walking over to the dumpster. Why the dumpster? The plastic of the hose is very fragile, especially when cold, and any movement drives the ice through it and ruins the hose.

I won't mention whether I had horns that day.

And of course, once the drain hose freezes, the water backs up into the grey tank, and then into the tub, and (if you trickle long enough) onto the floor in the bathroom. Been there, too, though not as part of a freeze.

Bill