Can you pour boiling water on frozen pipes?

Author: Hayley Fritsch  |  Last update: Tuesday, January 13, 2026

Never pour hot water on frozen plumbing or try to thaw pipes with a blowtorch. The hot water usually freezes on the outside of the pipe, and the torch can cause frozen pipes to explode if steam is produced. Also, do not strike pipes in an attempt to break up the ice, as hammer blows can cause pipes to crack.

Will boiling water unfreeze pipes?

Frozen water expands, creating pressure that can cause pipes to crack or burst, which can be expensive. Be aware of the warning signs for frozen or burst pipes. If you suspect there's a burst pipe, act quickly. Avoid using boiling water to unfreeze your home's pipes.

How do you unfreeze a pipe quickly?

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...

Can boiling hot water damage pipes?

Chemical cleaners can eat away at your pipes, and boiling water can melt important components. Over time, this damage can lead to leaks and expensive plumbing repairs.

What can you pour down drain to unfreeze pipes?

Here are some tips that can help:
  • Boil water. Boil a generous amount of water and add a cup full of salt to it. ...
  • Baking soda. While the water is boiling, put around ½ a cup of baking powder in the drain. ...
  • Vinegar. Pour one cup of vinegar down the pipe immediately after putting baking soda. ...
  • Pour boiling water. ...
  • Run hot water.

The Hot Water Dilemma: Can It Damage Frozen Pipes?

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 salt water down drain unfreeze pipes?

The job goes more quickly by pouring hot water or a mixture of vinegar, baking soda and salt water down the drain. Space heaters, hair dryers and heating pads are highly efficient tools for unfreezing a drain pipe. If a frozen drain line ruptures, turn off your home's main water supply.

Does boiling water help unclog pipes?

Ultimately, pouring boiling water down the drain can be a useful method for dealing with certain types of clogs, but do note that it's not a one-size-fits-all solution.

Can you pour boiling water down an outside drain?

How do I clear an outside drain blocked with fat? Boil a kettle full of water and, wearing long sleeve gloves, goggles and a mask, pour it down the outside drain being careful not to cause any to splash back onto your skin. If hot water doesn't work, you can try using caustic soda, also known as sodium hydroxide.

Can I pour boiling water down my toilet to unclog it?

While it is okay to pour boiling water down sink drains, you should never use boiling water in your toilet, as the heat can cause the porcelain to crack. Instead, run your tub until the water is hot and fill a good-sized stockpot or bucket with it.

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

Keep the faucet open. As you treat the frozen pipe and the frozen area begins to melt, water will begin to flow through the frozen area. Running water through the pipe will help melt ice in the pipe.

Can a pipe thaw without bursting?

And once the temperature outside dips below 32F, unprotected pipes are at a greater risk of freezing and potentially bursting. That said, it's still possible for your pipes to thaw without bursting. The key is to release the pressure and allow the pipes to thaw slowly.

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.

Can I flush my toilet if my 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. Turn off the water supply and address the frozen pipe before attempting to use your toilet again.

What is the fastest way to unfreeze water pipes?

Try wrapping an electronic heating pad around the pipe, heating the area with a hair dryer, or both. Towels soaked in hot water will help as well. Apply until water runs normally. If possible, locate the section of pipe that is frozen and thaw it yourself using gentle heat (slowly warm it up).

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.

Can you pour boiling water down frozen pipes?

All the above methods for thawing a frozen water pipe will work for thawing a frozen drainpipe, except for the torches-you DON'T want to use a torch on a PVC or ABS plastic pipe. Plus, here's a couple of other ways you could thaw a frozen drainpipe. Pour hot/boiling water down the drain and let it melt the ice.

Is pouring boiling water down pipes bad?

So, regularly subjecting your kitchen pipeline to boiling water will only soften or melt its joints (usually held together with glue). Over time, the water pipes will deteriorate and leak, requiring immediate repairs or replacement.

What to do if pour boiling water?

remove any clothing or jewellery that's near the burnt area of skin, including babies' nappies, but do not move anything that's stuck to the skin. cool the burn with cool or lukewarm running water for 20 to 30 minutes – do not use ice, iced water, or any creams or greasy substances like butter.

Is it okay to pour boiling water down the shower drain?

Sometimes you can clear a clog in metal pipes by simply emptying a kettle of boiling water down the drain, a little at a time. You can pour the water down the drain without removing the shower drain cover. Do not pour boiling water down PVC pipes, which can be damaged by the heat.

What's the best thing to unblock pipes?

#1: Use baking soda and vinegar

Let it sit for an hour or more (or overnight if you suspect the blockage is really bad) and then flush with hot water. In theory, the blockage should be gone but repeat the process if you experience further problems.

Does vinegar unclog pipes?

A completely clogged drain will require the help of a professional plumber, but baking soda and vinegar might be a quick fix for a partially clogged drain. This solution will dissolve and push the sludge through the pipes to allow water to flow through easily. Let hot water run for a minute to warm up the pipes.

What to do if drain pipes freeze?

Pour boiling water down the drain pipe

Whether you heat a pan of water on the stove or boil the water in the kettle, there needs to be enough water to break through the ice and defreeze the drain completely.

Will your pipes unfreeze themselves?

Pipes will eventually unfreeze on their own naturally, but this takes far more time and before thawing occurs the freezing could become much worse. This could eventually lead to the pipe bursting and causing significantly more damage. It's better to proactively thaw a frozen pipe size than let it persist.

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.

Previous article
Will foam pipe insulation keep pipes from freezing?
Next article
How do you tell if a roof dryer vent is clogged?