Drain pipes can and do freeze. By understanding the risks and acting quickly with safe thawing methods, you can prevent a minor inconvenience from turning into a major plumbing emergency.
| Strategy | Application | |----------|-------------| | (foam or fiberglass) | Wrap pipes in unheated spaces. | | Heat tape / heat cable (self-regulating) | Attach to pipe length in crawlspaces or attics. | | Maintain consistent slope (¼” per foot) | Ensure no sagging where water can pool. | | Seal air leaks | Close gaps around pipe penetrations in walls/floors. | | Let warm water run (during extreme cold) | A slow trickle of warm water through sink/tub prevents freezing. | | Keep cabinet doors open (under sinks) | Allows warm room air to reach pipes in exterior walls. | | Disconnect and drain outdoor drains | Hose bibs, downspout extensions, and exterior sink drains. | can drain pipes freeze