Never use an open flame (like a blowtorch) to thaw a drain pipe. This is a major fire hazard and can melt PVC pipes or boil water in the trap, creating dangerous steam pressure.

If you have fixed the freeze, you must prevent it from happening again.

If none of the above works after 2 hours, call a plumber. A pipe frozen inside a wall may already be cracked.

Before you can fix it, you have to confirm it isn't just a standard clog.

If your bathtub drain pipe could leave a review on your homeowner skills, it would likely say, "It’s not you, it’s the sub-freezing temperatures." Dealing with a frozen drain pipe is a frustrating, stressful, and potentially expensive household emergency. Below is a breakdown of the "performance" of this issue and how to resolve it.