Thawing a frozen drain is usually a DIY-friendly task if you stay patient and avoid extreme heat. But when in doubt, remember: a $200 plumber visit is cheaper than fire damage, burst pipes, or third-degree burns. Stay warm and drain safely.

A frozen drain pipe is a common winter plumbing nightmare. Unlike a supply pipe (which brings water in ), a drain pipe carries wastewater out . When a drain freezes, you’ll typically notice your sink, tub, or toilet draining very slowly—or not at all. In some cases, water may even back up into your basement or shower.