Thaw Drain Pipes: How To

If you suspect the pipe is plastic, stick to warm water (not boiling) to be safe.

Frozen drain pipes are a common winter nightmare. Unlike supply lines (which bring water in), drain pipes carry wastewater out. When the water sitting in a trap or a low spot freezes, it creates a solid blockage. If you try to use the plumbing above that blockage, you risk a backup—or worse, a burst pipe. how to thaw drain pipes