The Anti-Freeze... Froze?

Last weekend, Zortman's David Crasco walked out to his camper and discovered his RV's antifreeze froze despite the label showing -75°F. The real temperature did hit -40°F this weekend and after some research, Crasco found that it will in fact freeze but it is not supposed to expand which would cause the pipes to burst. Still, a funny reminder of how cold it was.