Call a plumber if:

Pour 1/2 cup of standard table salt or rock salt directly down the drain.

: If you suspect a pipe has already burst, immediately shut off the main water supply to prevent flooding.

How to Unfreeze a Drain Pipe: A 2021 Winter Survival Guide When winter temperatures drop below 20°F, your plumbing is at high risk. If you turn on the tap and only get a trickle, or if your sink won't drain, you likely have a frozen pipe.

What are your pipes made of? (PVC plastic, copper, or galvanized iron)

If you are dealing with a frozen plumbing line, you can safely resolve the issue using the right tools and techniques. This comprehensive guide covers how to identify the freeze, step-by-step methods to thaw the pipe, and preventative measures to keep your water flowing smoothly all winter. Step 1: Locate the Frozen Section

Repeat the process if necessary until the drain flows freely.

If you have tried these methods for an hour with no success, or if the frozen pipe is located inside a wall where you cannot access it, it is time to call a licensed plumber. Professionals use specialized equipment like (which use electrical currents to heat the pipe from the inside) or steam injection to clear blockages without destroying your drywall.