How do I unfreeze my main water line to my house?

Author: Judd Schaden  |  Last update: Tuesday, November 18, 2025

Apply heat to the frozen area There are several ways to do this. You can wrap the pipes in thermostatically controlled heat tape, or you can use an external heat source such as a hair dryer or space heater. Do not use a propane torch as this can damage the pipe and create a fire risk.

What to do if your main water line is frozen?

To-Dos for Frozen Pipes
  1. Turn off the main water line.
  2. Turn on the faucet supplied by the frozen pipe.
  3. Thaw hidden pipes.
  4. Apply heat to exposed pipes.
  5. Avoid certain devices when thawing pipes.
  6. Check for other frozen pipes.
  7. Call a plumber.
  8. Prevent frozen pipes in the future.

What is the fastest way to unfreeze water pipes?

A frozen pipe can be thawed out using a hot water bottle, a heat gun, hair dryer or you can even use a blow torch set to low heat, providing your pipes are metal (do not use a blowtorch on plastic pipes). An outside tap cover is a great idea and can prevent pipes and taps from freezing- Outside tap cover | pr...

What do plumbers use to unfreeze pipes?

Tip #7: A Thaw Machine Will Be Your Savior

It's exactly what it sounds like: a portable device that plumbers use to thaw pipes quickly.

Will pouring hot water down the drain unfreeze pipes?

In most instances, pouring hot water down the drain will unfreeze drain pipes. However, it's essential to take your time with this method to increase its effectiveness and ensure your safety. Follow these simple steps: Fill a pot with a half-gallon of water and bring it to a boil on the stove.

How I thawed out a frozen underground water supply line from the street to my house

Will pipes unfreeze on their own?

Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing.

What is the best way to unfreeze plumbing?

How to unfreeze pipes
  1. Turn on the faucet. Keep it running. ...
  2. Apply heat to the frozen area. Slowly apply heat using a hair dryer. ...
  3. Continue to apply heat. Don't stop heating until the full water pressure is restored. ...
  4. Check all faucets and prevent pipes from freezing in the future.

Should I turn off water if pipes are frozen?

Thaw Frozen Pipes

Turn off the water immediately at the main shut off valve. Open the faucet so that water will flow through the pipe once the area is melted. This will help melt more ice.

How much do plumbers charge to unfreeze pipes?

Burst pipes will need to be replaced and a plumber is best equipped to handle the job. The average hourly plumber rate is around $330, depending on where you live and the size of your job. As long as your frozen pipes haven't burst, a plumber will likely charge a flat fee of around $100 to thaw them out.

What do you pour down drains to unfreeze pipes?

Easy ways to thaw a frozen drain pipe include turning up interior temperatures and wrapping pipes in hot towels. The job goes more quickly by pouring hot water or a mixture of vinegar, baking soda and salt water down the drain.

How long to run water after pipes unfreeze?

Be prepared to wait at least 30 to 60 minutes. When the pipe begins to thaw, water will start flowing at a faster rate through the open faucet. Even after the water pressure is fully restored, it's recommended to keep the heat on the pipe to ensure the ice in the line is completely melted.

How do you tell if your pipes are frozen?

The clearest sign that you have frozen pipes is if there is a complete lack of water coming out of your faucets and fixtures. This means that the water in your supply lines has frozen solid. In some cases, due to a partial freeze, you may still see a slight trickle of water.

How do I make sure frozen pipes don't burst?

Here is a list of eight things that you can do to avoid water pipe bursts:
  1. Keep Water Faucets Running. ...
  2. Direct Warm Air to Cold Areas of Your Home. ...
  3. Leave Your Cabinet Doors Open. ...
  4. Disconnect Your Hose from the Outside Faucet. ...
  5. Install Heat Tape. ...
  6. Seal Leaks That Allow Cold Air into Your Home. ...
  7. Check Your Home's Temperature.

What do you do if your hot water pipe is frozen but not cold?

Open a Hot Water Valve

By opening faucets, water will have a path to flow as the pipe unfreezes. Steam will also need a place to go as heat is applied. As the pipe thaws, running water will accelerate the defrosting process. Therefore, it's beneficial to have faucets running until the pipe is completely thawed.

Do you drip faucets during a freeze?

Should You Drip Faucets In Cold Weather? Yes, according to the Red Cross, the short answer to that question is you should.

How do you unfreeze blocked pipes?

If this is the case, feel your walls and ceilings to find it - the surface should feel cold if you have a frozen pipe. Once you have found it, turn up your thermostat and open the doors inside your home so that the warm air can reach the pipe. You could also use a space heater to apply direct heat to the affected area.

Can you just let frozen pipes thaw on their own?

Frozen Pipes Shouldn't Be Allowed to Thaw on Their Own

The laws of physics say water always takes up more volume as it freezes. When your pipes can no longer contain the expanding ice, they will burst. This not only breaks the pipes and makes your plumbing system unusable, it may cause serious water damage as well.

Who can I call to unfreeze my pipes?

If you are unable to locate the frozen area, if the frozen area is not accessible, or if you can not thaw the pipe, call a licensed plumber.

Does Roto Rooter unfreeze pipes?

If you run into any problems unfreezing a pipe, be sure to give your Roto-Rooter plumber a call. Roto-Rooter is equipped with professional grade pipe thawing equipment that can be employed before a pipe bursts and causes water damage.

Can I flush my toilet with frozen pipes?

Can You Flush the Toilet If Your Pipes Are Frozen? In most cases, no. Attempting to do so can cause pressure buildup in the pipe and lead to bursting. Additionally, flushing a toilet with a frozen pipe can result in unsanitary conditions due to a lack of proper drainage.

What not to do with frozen pipes?

Do NOT Use These Methods To Thaw Frozen Pipes
  1. Blowtorch.
  2. Gas heater.
  3. Kerosene heater.
  4. Propane heater.
  5. Other open flame appliances.
  6. Any device near insulation.
  7. Electric device with extension cord.
  8. Electric heater, blow dryer, or other device near water.

Should I turn my faucet on if my pipes are frozen?

Ask any plumber, "Should I turn off the water if pipes are frozen?" and they'll immediately tell you, "Yes." Locate your main water line and switch the shut-off valve so the flow of water stops. By doing this, you'll reduce the amount of pressure that builds inside your frozen pipes.

How do you unfreeze pipes without access?

For hidden pipes: Use an infrared lamp to target frozen areas. You may need to make an opening in your wall to access the pipe. For exposed pipes: Use a hair dryer, infrared lamp, portable heater, heating pad, heat tape, or steamed towels to apply heat (never use an open flame).

How long does it take for water pipes to unfreeze?

It will take roughly 30-40 minutes of using a heat source to thaw exposed pipes. If the pipes are enclosed it will take longer for heat to penetrate the insulation between your heat source and the pipe.

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