Will my water tank freeze?

Water freezes at 32° F or 0° C. If you're worried about your water freezing, drain 10 inches of water from your tank as water expands about 10% when frozen. It's not common for Sure Water tanks to freeze all the way through unless conditions are cold enough for a long time. Many of our water tanks are stored in unheated garages during the winter and rarely have a problem with freezing.