Otherwise, a single hard, overnight freeze can burst either the faucet or the pipe it's connected to. Wrap water pipes in areas such as crawl spaces, basements and garages with insulated material. Pipes located on outside walls and near crawl space openings and vents are most vulnerable to freezing. You can use clean, dry rags or blankets in place of commercial insulating material. Plug up drafty cracks and repair broken basement windows.
Winter winds whistling through overlooked openings can quickly freeze exposed water pipes.
Be sure not to plug up air vents that your furnace or hot water heater may need for good combustion. Be sure all members of your household know where the valve is located. Be prepared to turn the valve off should a water line burst. During freezing weather Do not keep crawl space, basement or garage doors open during cold periods. The cold air could freeze exposed pipes.