Which part of the plumbing system is most vulnerable during cold weather?

Exposed pipes are particularly vulnerable during cold weather because they are not insulated or protected by the building’s structure. When temperatures drop, these pipes are at risk of freezing. When water inside the pipes freezes, it expands, which can lead to cracks or complete breaks in the pipes. This can cause significant damage, including leaks and water loss, as well as costly repairs. Insulation can mitigate these risks, but any pipes that are not properly insulated tend to be the first to suffer from freezing temperatures.

While water heaters, sinks, faucets, and drainage systems can also be affected during cold weather, they are generally more protected or less likely to freeze compared to exposed pipes. For example, water heaters typically have built-in insulation, and sinks and faucets may be located in warmer areas of a house. Drainage systems usually deal with waste water and are designed to move it away from the property, therefore are less likely to freeze in a typical scenario.