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What Is the Best Way to Thaw Frozen Pipes Safely?

Last updated October 31, 2026

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The short answer

Start with the Faucet

Begin by opening the faucet connected to the frozen pipe. This relieves pressure and lets water flow as the ice melts. You want a steady trickle, not a full stream. Keep the faucet open while you apply heat.

Work from the faucet end toward the frozen area. This allows melted water to escape rather than building up pressure. If you have a shutoff valve nearby, know its location now. In a cold snap, you may need to act quickly.

Apply Heat Gradually

Use a hair dryer on a low setting, a portable space heater, or towels soaked in warm water. Hold the heat source a few inches from the pipe and move it back and forth. Never leave a heater unattended, and keep it away from flammable materials.

Wrap the pipe with an electric heating tape if you have one. That delivers steady, low heat along the pipe. Avoid using a blowtorch, propane heater, or charcoal stove. Open flames can damage the pipe and start a fire.

  • Hair dryer on low heat
  • Space heater aimed from a distance
  • Warm towels wrapped around the pipe
  • Electric heating tape
  • Hot water bottle or heating pad
  • Never use an open flame

Check for Leaks

As the ice melts, watch for drips or cracks. A burst pipe may leak when the water flows again. If you see water, turn off the main shutoff valve right away. Then open the faucet to drain the line.

If the leak is small, a plumber can repair it. But if water has soaked walls, floors, or ceilings, that is a water damage issue. Local water damage pros can dry out the area and prevent mold growth. Act fast to limit damage.

Prevent Future Freezing

Insulate exposed pipes in unheated areas like attics, crawl spaces, and unheated garages. Use foam pipe insulation or heat tape. On very cold nights, let a faucet drip slowly. Moving water is less likely to freeze.

Seal cracks in walls or foundations where cold air reaches pipes. Keep garage doors closed if pipes run through the garage. Preparation helps, even in warmer climates where freezing is rare.

When to Call for Help

If you cannot thaw the pipe or you discover a burst, shut off the water and call a plumber for the pipe repair. For water damage from the leak, contact local water damage pros. They can remove wet drywall, flooring, and insulation.

Water that sits for more than a day can lead to mold. The pros use drying equipment and moisture meters to find hidden dampness. They can also check the attic and walls for damage. Act quickly to protect your home.

  • Shut off the water first
  • Call a plumber for pipe repairs
  • Contact the pros for cleanup
  • Remove wet carpets and furniture
  • Use fans and dehumidifiers to dry
  • Check for mold after drying

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Frequently asked questions

How long does it take to thaw a frozen pipe?

It depends on the pipe material, ice thickness, and the heat source you use. A small pipe may thaw in about half an hour with a hair dryer. Larger or thicker ice can take a few hours. Be patient and keep the heat moving.

Can I use a blowtorch to thaw a pipe?

No. Open flames can ignite nearby wood or insulation and can weaken the pipe. The heat may cause the pipe to burst. Use gentle heat like a hair dryer or warm towels instead.

What should I do if the pipe bursts?

Turn off the main water shutoff valve immediately. Open the closest faucet to drain the line. Then call a plumber to fix the pipe. If water soaked your home, contact the pros to dry and clean the area.

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