We were camping with some friends on Thanksgiving several years back. It dipped down into the 20's that night. They left Thanksgiving morning to spend a few hours with family. What they did not realized was that when they had gotten up their daughter had turned on the bathroom faucet only to find out there was no water because the hose was frozen. After a few hours we were sitting at our table and I glanced out the window to see water coming out of every possible opening in their camper. The water hose had thawed out and water started running from the faucet that the daughter had opened but not closed. When the gray tank fulled up water started running everywhere in the camper.
Scratch one stick built.
Disconnect your water hose