JRscooby wrote:
What people say about how long it would take to freeze in the tank is true. But the lines out of tank can freeze pretty quick, and if the line is full of ice your better off with MT tank. You can't use the water anyway.
I camp in a pop-up camper, and have stayed out when day-time highs where in 30s, nights in teens. My tank is under floor, right at axle. I have 3 pieces of line about 20 feet long with half of 1 of the cheap space blankets secured near the end of each. Throw line under trailer, then pull blanket under. Use magnetic clips to hook to frame, so I have a triangle shaped space between ground and tank. Hang a heat lamp, like what they sell for chickens, (200? watts) on the water line. Cover the end with 1 of the things sold to put on windshield to keep inside of car cooler
JIMNLIN said: "What works for your rv may not work on others all depending how well its insulated...water lines protected/etc and the biggy around here is the wind when temps hit 32 degrees."
^^This is very true!!
The OP will do just fine, in the conditions he describes!
In the case of the poor fellow trying to make do, with a pop up, temps in the teens, daytime 30s, it is foolish to continue trying to use water supply. A tent, or canvas sided tent on wheels is not suited to well below freezing temp camping.
Jerry