Why Does Toilet Bubble When Flushed(Fix Toilet Gurgling)2024

Why Does Toilet Bubble When Flushed

The pressure in your pipes rises when there is a blockage, creating negative pressure. Bubbles are caused in your toilet bowl by the opposite action of air flowing in and out of your pipes. A blocked sewer line may cause your toilet to bubble when it flushes if the bubbles are coming from the bowl during flushing.

There is also a possibility that the blockage is inside the bowl. In this article, We guide you from start to end on “Why Does The Toilet Bubble When Flushed”?

Why Does The Toilet Bubble When Flushed

Some other products work very well for cleaning drains such as baking soda and Comet. To sanitize your toilet bowl, make sure you pour some toilet bowl cleaning solution or bleach diluted with water into it. The bubbling and gurgling noises may be solved by a designated cleaning session in some cases. It may only require a little cleaning to get your pipes back into shape before they are in good working order again.

What Are The Reasons For The Bubbles in a Toilet When It is Flushed?

There is a lot of air pressure that has to be present for your pipes to carry water and waste. When your toilet bubbles up while draining, you have a blockage in your toilet. If your plumbing is blocked, there will be suction which is the result of negative air pressure. It is often seen that the water bubbles or gurgles when the air escaping from the toilet backs up into it, causing a gurgling sound.

  • A Clogged Toilet

When we flush something that should not be flushed for whatever reason, we are all too familiar with the results. There are generally a few things that cause the most waste to be flushed out of the toilet such as paper towels, feminine products, tissues and tobacco butts and wipes. Several firm pumping motions should be sufficient to remove a clog located close to the surface. Clogs that are difficult to reach and tough to remove can be cleared with a mechanized sewer snake.

When you’re dealing with such an issue, your go-to tools will be a plunger and a sewer snake. There are times when a plunger is necessary to clear out a clog that is close to the surface. The toilet should be sealed with duct tape before flushing any other bathroom fixtures. In this manner, pressure will not be allowed to escape from the drain line and the drain line will be cleared.

  • A Faulty Cistern

Water is flushed and refilled from the tank by the flapper inside the cistern. You need to check the flapper and see if it has been damaged or is faulty for this to be the way water is not draining properly. The flush mechanism on the toilet in the restroom is dirty and in need of cleaning. If you have a defective flapper, you should replace it with a new one to resolve the problem. There will probably be a need to replace the entire cistern if the problem is with the entire mechanism of the cistern.

  • Blocked Vent Stack

There should be no seals, closures, or obstructions so that reverse suction doesn’t occur and bubbles don’t occur. Vent stacks control plumbing air pressure and release exhaust gases through vertical pipes leading to your roof. Gassy odors leaking into the home are another sign the vent may be the problem. In the middle of a blue sky, chimneys can be seen on a building’s rooftop.

A bird’s nest is most often responsible for vent blockage. The vent may become clogged with leaves or other small animals. It is no problem for New Flow Plumbing to remove clogs from vents that are not accessible or that are not near the surface.

  • Clogged Mainline

A clog that affects the entire house such as toilet bubbling when the other flushes indicate a main problem. Your home’s fixtures connect to the mainline which carries all wastewater to the municipal connection. In the past, repairing a damaged mainline was expensive because it was difficult to access.

There is a very small amount of digging required for trenchless sewer repair. The pipe can only be accessed by digging two pits that are 4ft by 4ft each. Now, traditional sewer repairs can be completed in just a few hours instead of days. To fix the damage left behind, New Flow Plumbing uses only the highest quality materials.

The traditional method of repairing your home involves tearing out the floors, walls and dirt from your backyard which means you will have to spend more money to have these things done. We can resolve the issue with trenchless technology without the need to tear apart your home.

  • Damaged City Connection

Your utility company or city municipal department is now in charge of fixing the problem since the source of the problem is no longer under your control. To locate and remove clogs in your pipes, New Flow Plumbing can perform a CCTV sewer inspection. Ask your neighbors if they are experiencing similar issues if your house is affected. Check with your water provider and notify them as soon as possible if the issue persists.

How To Prevent Toilet Bubbles When Flushed

There is a variety of reasons you have read above. Now we guide you on how you can remain safe from the toilet bubbles in your toilet while flushing. The following techniques will help you prevent problems in the future.

  • Flush Slowly With Lots of Water

Flushing your sewer system with extra care is one of the easiest ways to prevent buildup or clogs. Water can be added to your toilet bowl before you flush it. Some toilet bubbles may be mitigated by doing this operation slowly and steadily. You should flush your toilet with plenty of water when boondocking because water may be limited. Your toilet’s sewer system could benefit from this simple daily step.

  • Treat Your Black Tank Frequently

There is no need to only use these chemicals for emergencies! The black tank is treated monthly so there is never a buildup of harmful materials or a clog of the tank. The chemical treatment of your black tank can also help you diminish the presence of odors associated with it so that it is more pleasant to use.

  • Use of Home Remedies

The use of vinegar and hot water solutions are also some of the home remedies you may wish to consider when it comes to cleaning your black tank. You may be able to treat your black tank with home remedies if you are camping but do not have access to more powerful treatment.

  • Purchase a Drain Pipe Cleaner

If your toilet is prone to clogs, then you might still be able to benefit from having a sewer hose attachment or a snake to keep your toilet sewer system running smoothly. The toilet’s pipes can easily clog just like black tanks.

  • Inspect Your Air Vent Seasonally

As the toilet sewer system relies heavily on the air vent from the black tank, it is vital to ensure that this pipe is inspected seasonally. The toilet bubble is often caused by this type of clog. If you plan to spray water down your air vent, make sure to investigate first. If there is a buildup, it needs to be cleared in a particular way to prevent wildlife from getting trapped inside. If you see any clogs or buildup, investigate this air vent further.

  • Take Your RV to a Professional

The bubbles that appear in the toilet bowl after flushing can be caused by a broken toilet, a faulty water and sewer valve or any number of other issues related to your RV’s plumbing and sewage system. It may be time to bring your rig in to see a professional if you have been troubleshooting this problem for some time. You should be able to diagnose the problem if you explain in detail what happens when you flush your toilet.

Frequently Asked Questions

What other plumbing issues can a clogged drain cause?

Slow drains, gurgling drain sounds and sewage backups can all result from a clogged drain.

Why does my toilet bubble? How can I prevent this from happening in the future?

Preventing future plumbing issues can be accomplished through regular maintenance and cleaning. You need to clean out your drain regularly, make sure your venting system is working properly, and always be aware of what goes down the drain.


If your toilet bubbles when flushed, this can signal a serious plumbing issue that needs to be addressed immediately. To avoid future plumbing problems and ensure that your plumbing system is functioning properly, you need to understand the reasons behind this issue and take the necessary steps to fix it. The purpose of this article is to provide you with some solutions, and I hope that you feel prepared and ready to deal with the sewer system in your toilet, no matter how unpleasant it sometimes can be to deal with it.

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