How long does it take for frozen pipes to thaw?

Author: Mr. Mario Wisoky  |  Last update: Wednesday, February 25, 2026

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.

Will frozen pipes thaw out on their own?

Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing. As they do so, you may begin to hear your pipes making gurgling, clanging, or banging sounds as the ice begins to move. The hot water heater may do the same.

How long does it take pipes to unfreeze naturally?

The same cold temperatures that caused your pipes to freeze in the first place could persist for days or even weeks. Without intervention, your pipes probably won't thaw out until a significant change in the weather occurs. In Anoka, you might be waiting for months for your pipes to defrost naturally.

How long can pipes be frozen before they burst?

Pipes typically burst when exposed to extremely low temperatures for an extended period of time (anywhere from 1-3 days depending on temperature). This is especially true for pipes located on exterior walls. A frozen pipe is likely to burst when any water or liquid trapped within it freezes and begins to expand.

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 you can safely thaw your frozen pipes

How do you unfreeze pipes without bursting them?

Manually thaw: Begin the thawing process at the most vulnerable places (near faucets). By targeting these areas first, your pipes will be less likely to burst. To do so, gently apply heat to the frozen areas. A blow dryer is a good option (use caution, go slowly, and don't use an open flame).

Will turning up the heat unfreeze pipes?

Turn the Heat Upin the Property: You can attempt to thaw the frozen pipe by increasing the temperature in the property. Turning the thermostat up may be all that is needed to allow the ice blockage to melt.

Should I turn off water if pipes freeze?

But if they have running water, it's likely your pipes have frozen. 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 do I know if my pipes are frozen or busted?

A foul smell from the drain or faucet is a less-obvious warning sign. Odors are unable to filter out of the frozen pipe and instead are forced back into the home's faucet. No water or a slow trickle when a faucet is used. Whistling and banging coming from pipes, or strange bubbling sounds when you flush a toilet.

Why do frozen pipes burst when they thaw?

Surprisingly, it's actually the thawing process that can cause a pipe to burst. This can happen when pressure continues to build as the newly thawed liquid begins to flow and forcefully pushes against the still-frozen areas within the pipe.

How to thaw a pipe you cannot access?

If the pipe is behind a wall, you can turn up the thermostat and wait for the thaw. Or you can hook up a lamp to warm the area. Infrared lights work best because they don't warm the air, just the pipes behind the wall. If the pipe is exposed, you can heat it with a hairdryer.

What do I do if my pipes are still frozen after 2 days?

If your pipes have been frozen for more than two days, shut down your home's water supply. Locate the frozen length using touch, sight and sound. Make sure the pipe hasn't burst, and open indoor faucets. Unfreeze the pipe using a hair dryer, heat tape, space heater or heating pad.

How to find where pipes are frozen?

Turn on all faucets: Checking each faucet in your home will help you narrow down your search. The faucets that have little or no water pressure likely have a frozen pipe in their supply line. If every faucet is showing low water pressure, the frozen pipe may be near the water meter.

Can I wait for my pipes to unfreeze?

We don't recommend the waiting game because the longer your pipes are frozen the more likely it is that they could burst. Burst pipes lead to water damage and water damage may result in structural and property damage, not to mention mold growth.

Should you leave faucets open when water is turned off?

Pipes: Turn off water supply to the house and drain pipes to protect them from freezing. You can empty pipes by running the water and flushing the toilets after the water has been turned off. After draining the pipes, it is a good idea to leave the faucets open to prevent pressure build up from any water that remains.

How to tell if washing machine pipes are frozen?

Signs of a Frozen Washing Machine Drain
  1. Visible Frost. One clear sign that the washing machine drain is frozen is ice. ...
  2. Water Around the Drain. The drain is frozen, preventing additional water from draining away. ...
  3. Washing Machine Errors.

Will running hot water unfreeze pipes?

Pipe-thawing options: There are several things you can do to thaw your home's pipes. Here's a list: Probably the most popular and safest pipe-thawing option is to use hot water.

How likely is a frozen pipe to burst?

Although common, frozen pipes do not always burst. However, the ice can increase this risk when it thaws and is usually worsened as it raises pressure further which makes pipe bursting common near winter's end or springtime. Furthermore, the more water flowing through the pipe, the greater chance of rupture.

Will frozen pipe burst if the faucet is open?

It's important to note that you shouldn't fully open your faucets and plumbing fixtures directly after a freeze. This will drastically increase the water pressure within the pipes if there is any frozen water inside them, causing the pipes to burst.

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.

Can I call someone 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.

When can I turn my water back on after a freeze?

One: Watch the Weather: To avoid any risk of freezing and bursting pipes, it's essential to wait until the temperature consistently stays above freezing. Check your local weather forecast and make sure that the nighttime lows are also above freezing for at least a week before turning on your outside water.

How do you unfreeze pipes you can't reach?

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.

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.

Which house pipes are most likely to freeze?

Pipes That Freeze Frequently
  • Outdoor Water Lines.
  • Basement Pipes.
  • Attic Plumbing.
  • Pipes In Your Garage.
  • Kitchen Cabinet Piping.
  • Exterior Wall Pipes.

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