Originally Posted by Ronbo
I have never used the tank heater, I know it's probably a stupid question, but what tank(s) does it heat? It seems that if it was cold enough to have to heat your black/grey tanks it would be too cold to not have your fresh water winterized. We have camped when it was pretty cold but we used the campground facilities.
... remember, no questions are stupid. If your unit was equipped with tank heaters it most likely has them on all three tanks. They are mats (or strips) that are glued on the bottom of the tank and easily seen from the underside.
Although the fresh water tank is heated, a separate option to heat the lines and elbows to the fixtures is usually not included in stock packages (our Greyhawk didn't have it). I think in severe cold weather I would drain the plumbing, and not worry about the tank.
I had other questions and called the manufacturer's rep. Got lots of good information from friendly people. Tank heaters and cold weather camping are not as common as some of the other features we deal with in the forum.
Edit: Using the CG facilities if they are available is always my 1st choice just because it's easier.