Can liquid drain cleaner make a clog worse?

Author: Otho Goodwin  |  Last update: Thursday, January 1, 2026

The residual chemicals can be hazardous when the drain is disassembled or when a plumber's snake or auger is used. Potential to Make Clogs Worse: In some cases, if the chemical drain cleaner doesn't fully dissolve the clog, it can solidify within the pipe, making the blockage worse and more difficult to remove.

Can drain cleaner make a clog worse?

It's also possible for drain cleaners to end up making a clog worse. This can happen for a few reasons: First, the chemicals in drain cleaners can corrode pipes and cause damage over time. This can lead to leaks or even bursting, which can make a clog worse by creating additional blockages.

Why not to use liquid drain cleaner?

Damages Pipes And Bathroom Fixtures

Using chemical drain cleaners can cause your bathroom fixtures to become discoloured and lose their glossy shine. Due to their chemical reaction, they may also corrode the inner linings of your pipelines, which will eventually cause them to develop cracks and rupture.

How do you unclog a severely clogged drain?

Pour one-half cup table salt down the drain, followed by boiling water. Or try a cup of baking soda and a cup of vinegar—let it bubble, wait 15 minutes, then pour boiling water down the drain. You can also try a cup of baking soda and a half-cup of salt; let it sit for several hours, then flush with boiling water.

Why do plumbers say to not use Drano?

Drano is a very caustic liquid, and extremely dangerous. Sometimes it may not unclog a drain, and it just sits in the drain. If someone were to open that drain without knowing Drano is in it, it could splash on that person and cause severe injury. Also, Drano, over time, will eat away cast iron drains pipes.

How To Locate Clog or Blockage In Plumbing Waste Drain Pipe Without Hiring A Plumber

Does liquid Drano damage pipes?

The answer is yes, but with some caution. Drano can dissolve hair and other organic materials causing the blockage, but it's important to follow the manufacturer's instructions carefully. Using too much Drano or leaving it in the drain for too long can lead to damage on the pipes and potentially cause harm to the user.

What should you use instead of Drano?

Some of the best Drano alternatives include using a plunger or pipe snake, soap or salt mixed with boiling water, or baking soda and white vinegar. Also, for maximum effectiveness, you can combine several of these methods together to get rid of the clog.

Why should you never use baking soda and vinegar to unclog a drain?

Baking soda is abrasive, which, when used in large quantities, will cause the drain more damage. Additionally, the acidic nature of vinegar can eat away rubber and metal, damaging the plumbing. As these products break down the pipe and connectors in the plumbing in your home, it will cause more clogs over time.

What do you do if your drain won't unclog?

Pour one cup of fresh baking soda down the drain, followed by one cup of white vinegar. Place a rubber stopper or other sink hole cover over the drain opening. Wait 15 minutes to allow the vinegar and baking soda to unclog your drain, Then take out the drain cover and run hot tap water down the drain to clear the clog.

What happens if you leave drain cleaner in the drain too long?

The chemicals in the product are designed to break own the clog, but if left for too long, they can start to break down the pipes themselves. This can lead to cracks and leaks in the pipes, leading to various issues, including water damage and flooding.

Are liquid drain cleaners safe for PVC pipes?

Nearly all chemical drain cleaners include sodium hydroxide. This active ingredient creates heat during a chemical reaction with the targeted materials. When exposure to the resulting heat lasts too long or when the heat generated by sodium hydroxide is too high, PVC pipes may also start to break down.

Does liquid plumber really work?

Overall, it is viewed as a reliable and affordable option for maintaining clear drains. Liquid-Plumr Industrial Strength Gel is highly effective at clearing tough clogs, with easy-to-use packaging and a strong scent that neutralizes odors. It's safe when used as directed and offers great value for its performance.

What do plumbers do to unclog drains?

How Professional Plumbers Clean Your Drains
  • Manual Drain Snakes. A manual drain snake, also known as a plumber's snake or a drain auger, is a small boring tool that rotates slowly as it's physically pushed through a stubborn clog. ...
  • Motorized Drain Snakes. ...
  • High-Definition Drain and Sewer Line Cameras. ...
  • Hydro-Jetting Machines.

What is the number one cause of clogged drains?

One of the most common causes of clogged drains is actually caused by the minerals in the water. Hard water is full of minerals that build up and easily prevent drainage in your pipes. The best solution is to have a water softener installed in your home.

Can plunging make a clog worse?

One common question people ask is, “Can plunging make a clog worse?” The short answer is yes, but only if you're not using toilet plungers correctly. Using too much force or plunging too vigorously can push the clog further down the drain, making it harder to remove.

How do you unclog a deep drain clog?

How To Unblock A Clogged Drain Deep In Pipe
  1. Using a Toilet Plunger or Plunger.
  2. Applying Baking Soda and Vinegar.
  3. Employing a Drain Snake or Plumbing Auger.
  4. Hydro Jetting Techniques.

Is baking soda and vinegar better than Drano?

Using baking soda and vinegar to unclog a drain is an effective and natural cleaning method, which some people prefer over harsher chemicals. It works great for weaker drain clogs. By using this mixture periodically, you may be able to avoid clogs altogether (and the need for a more powerful cleaner like Drano).

What will dissolve hair in a drain?

Heat 2 or 4 liters of water on your stove or in a kettle to just short of boiling. Add about 1/2 cup of salt. Try pouring this down the drain, then wait 15 minutes before seeing if it will clear more easily. If you need a stronger cleaning, pour 1/2 cup of baking soda down the drain, then add 1/2 cup of vinegar.

How do you unclog a drain when the water won't go down?

Unclogging a Drain with Standing Water

Clear any debris you see blocking the drain, then use a container to scoop out all standing water. Plug the overflow drain with a rag, then place your plunger over the entire drain. Continuously push the plunger in and out until you hear the pipes begin to empty.

What happens if you put too much baking soda down the drain?

If you put too much baking soda down a drain onto a clog, it can sit on the clog and become a solid mass as it is subjected to more and more water. This will make the block worse and even harder to remove.

What to do when drain cleaner doesn't work?

Baking soda and vinegar may unclog your drain better than Drano ever could.

Why do plumbers not like Drano?

Plumbers unanimously encourage homeowners not to use Drano due to its corrosive nature. The chemicals in Drano can erode not only the clogged material causing the blockage but will also quickly eat away at the metal plumbing pipes themselves, causing more harm than good.

What's stronger than Draino?

The Santeen Sulfuric Acid Drain Opener proved to be the most potent among all the chemical drain cleaners we tested, effectively dissolving 80% of the hair, 80% of the organic matter, 40% of the grease and 76% of the paper products.

Does salt and boiling water unclog drains?

Salt & hot water

While hot water can help loosen up debris, coarse salt actually scours the inside of your pipes, removing more material than hot water alone. After removing standing water from the sink, pour about half a cup of table salt down the drain before you pour in the hot water.

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