I went camping with friends at Kerrville Schreiner Park over that really cold weekend where it stayed in the twenties a few days in January. It even got down to 16 one of the nights for about three hours. My camper was fully winterized, but two of the others weren't. At about 10:30 the first night, one of my buddies asked me to come over and help him figure out his water pressure problem. His wife was trying to shower and there wasn't enough pressure. His pipes were starting to freeze up. By morning, his regulator and water filter had both exploded. I would rather do without on-board plumbing until late February and not risk any damages. The Colby T is too important to me.