Pipes can burst when the water inside them freezes and expands, causing pressure that leads to ruptures. The temperature at which pipes freeze and potentially burst depends on several factors, including where the pipes are located, how much insulation they have, and the duration of the cold weather. Here are some key points to keep in mind:

• Water freezes at 32 degrees Fahrenheit, but pipes are not necessarily in danger of freezing and potentially bursting every time the temperature falls to 32 degrees.

• Pipes are at risk of freezing any time temperatures drop below 32°F, but its much more common for pipes to freeze when temperatures dip below 20°F.

• Pipes in attics, crawl spaces, and outside walls are all vulnerable to freezing, especially if there are cracks or openings that allow cold, outside air to flow across the pipes.

• Wind chill, the cooling effect of air and wind that causes the human body to lose heat, can play a major role in accelerating ice blockage, and thus bursting water pipes.

• Pipes are most likely to burst when exposed to below-freezing conditions for six hours or more, which can happen throughout winter and early spring.

• Exterior pipes are most susceptible to freezing temperatures because of exposure to the elements.

• Pipes exposed to cold air (especially flowing air, as on a windy day) are more likely to freeze and burst.

• Pipes that are older, exposed, and uninsulated are much more likely to burst during extended cold spells.

• To avoid pipes freezing and potentially bursting, keep your home a bit warmer than usual during frigid days and nights to help keep your pipes warm too.

In summary, the temperature at which pipes burst depends on several factors, and it is not necessarily the same for all pipes. However, it is much more common for pipes to freeze when temperatures dip below 20°F, and pipes are most likely to burst when exposed to below-freezing conditions for six hours or more.