The thin layer of organic sludge that lines your drain acts like a sponge. It holds moisture against the pipe wall. When freezing starts, that sludge creates a rough surface for ice crystals to latch onto. Within a few hours of your morning shower, a partial blockage can turn into a full ice dam. A frozen tub drain isn't just an inconvenience—it can be a disaster. When you run water to try to melt the ice, the water has nowhere to go. It backs up into the tub.
Stay warm, and may your drains flow freely. bathtub drain freezing
Here is why your tub drain freezes, why it’s dangerous, and how to thaw it out before you end up with a costly repair. We tend to think of our plumbing as existing entirely inside the warm envelope of our home. But the bathtub drain is a trickster. The thin layer of organic sludge that lines