What does it mean when a toilet gurgles?

Author: Dr. Lolita Langworth II  |  Last update: Saturday, April 25, 2026

The cause of your toilet gurgling is a blocked line somewhere. A clog is creating negative air pressure, Instead of air flowing through the lines,the air pushes back and causes the gurgling sound. Sometimes, you'll also see the toilet water bubble.

How do you fix a gurgling toilet?

Place the plunger over the drain opening at the bottom of the toilet bowl and push down firmly, then pull up quickly. Repeat this plunging motion several times to create pressure and dislodge the blockage. If the blockage is severe, you may need to repeat the process multiple times.

Should I call a plumber for a gurgling toilet?

The fix is to plunge the toilet until the clog is removed. However, if you notice gurgling sounds even after removing the clog, you will want to have your plumber clean the sewer lines. For instance, there could be excess toilet paper still causing a partial clog and preventing proper airflow down the pipe.

How to fix negative air pressure in a toilet?

The key is to understand that negative pressure is caused by blockages in the pipes. These occur in the waste pipe o the ventilation pipe. The simplest approach to resolve the issue is to use a plunger in your toilet. It's important that you use a toilet plunger as this fits over the whole of the opening.

Does a gurgling toilet mean septic tank is full?

When your septic tank is excessively full, your toilet may start acting odd. You might find that your toilet doesn't fully flush or flushes very slowly and odd noises occur when you flush your toilet. These noises usually sound like gurgling or bubbling.

Why Does My Toilet Gurgle After I Flush? | Ask a Plumber by Mr. Rooter Plumbing

How do I know if my toilet is clogged or septic tank is full?

You have trouble flushing your toilet, or it's constantly backing up. If all the bathrooms and drains in your home are draining slowly, or are hard to flush, this could indicate that it isn't just a simple clog. It may be a septic tank issue.

Can a gurgling toilet fix itself after flushing?

Can a Gurgling Toilet Fix Itself? It is possible the gurgling sounds go away on their own if the drain clog clears itself or you remove any debris from the vent stacks on the roof. If the issue lies in your main sewer line, you'll need the help of professional plumbers.

Will a gurgling toilet overflow?

If the sewer line is the cause of the bubbling in the toilet, it is important to address the issue as soon as possible, as it can lead to more serious problems if left unaddressed. In some cases, a sewer line problem can also cause the toilet to overflow, which can be a serious problem.

How do you get trapped air out of toilet pipes?

It is only necessary to open the faucets a half turn to allow the air in your pipes to escape. After you turn on all the cold and hot water faucets in your house, you should also flush your toilets to clear out the air trapped in your pipes.

How do I get rid of negative air pressure in my house?

The best way to get rid of negative house pressure is by making the home less airtight, and the easiest way to do so is by opening a window near the fireplace. While this is an effective method for preventing many of the performance problems associated with negative pressure, it is not a permanent solution.

How much does it cost to fix a gurgling toilet?

Prices to fix a running toilet range from $50 to $400. Sometimes, they run continuously. There can be various reasons for this, including a leaky flapper, too much water in the tank, or issues with the refill tube.

Can a plunger fix a gurgling toilet?

Plunging is often the first line of defense against toilet clogs and can sometimes resolve gurgling issues. Follow these steps: Ensure there's enough water in the bowl to cover the plunger head.

Is toilet gurgling normal?

That gurgling sound isn't just your toilet clearing its throat – it's a sign that something's disrupting the normal flow of air and water within your plumbing system.

Where is the vent pipe for a toilet?

However, here's a general guideline: 1. Behind or within the Wall: In most cases, the vent pipe for a toilet should run vertically from the toilet's waste pipe (known as the closet bend) and extend upward to connect with the main vent stack or a branch vent line that ultimately exits through the roof of your home.

How to unclog main sewer line?

Your step-by-step guide: How to clear a main sewer line clog
  1. Step 1: Loosen the cap on the drain pipe. ...
  2. Step 2: Open the cap and let the buildup drain out. ...
  3. Step 3: Feed the auger cable into the drain pipe. ...
  4. Step 4: Run the auger until the clog is clear—and beyond. ...
  5. Step 5: Hose down the pipe and auger cable.

Why is my toilet gurgling but not clogged?

It could be that negative air pressure or suction is building up in the drain line. Eventually, the negative air pressure releases, pushing air back up through the drain and into the toilet bowl, causing the gurgling sound. When this occurs, the toilet may also bubble and flush itself.

How do I get air out of my toilet system?

Excess Air in the Water Tank

Just open the filler valve at the back of your toilet and wait for about five minutes while it drains out some of its own water, then try refilling it again. This should get rid of any excess gas rattling around in there.

Will air in water pipes go away?

By turning off your main water supply and running all faucets for 10-15 minutes, you force any trapped air through your water pipes. Let's dive in a bit deeper to help you remove unnecessary air from pipes. Luckily, the fix for this is relatively simple and something most homeowners can easily do on their own.

What happens if you don't fix a gurgling toilet?

If your home and pipes are in good condition, you likely won't notice any damage at first. But over time, and with continued use, these can weaken your pipes and lead to leaks and other damage. The next time your drains are clogged or your bathroom sink gurgles, don't reach for the drain cleaner.

How to tell if a septic tank is full?

One of the most common signs of a full septic tank is difficulty flushing the toilet or constant sewage backup into the house or yard. This happens when wastewater cannot escape through the drainpipe due to a blocked line. Pumping your septic tank regularly can help prevent this issue from occurring.

How to fix air lock in toilet?

Use a Plunger : This is one of the simplest and most effective ways to remove an air lock. Fill the sink or toilet with water, place the plunger over the drain, and push down and pull up several times. This will create suction and dislodge the air lock.

When the washing machine drains, the toilet gurgles.?

It means that there is a blockage somewhere in your plumbing system. When the washing machine drains, it creates a vacuum effect that causes the toilet to bubble and indicates a blockage in the system. It could be in the main sewer line or one of the secondary sewer lines.

How to unclog toilets?

Solution 2: Vinegar and Baking Soda

Pour about half a cup of baking soda into your clogged toilet and wait for a few minutes. Then, carefully pour in two cups of vinegar. The reaction between the base (baking soda) and the acid (vinegar) should be apparent very quickly.

When toilet is flushed the tub makes a gurgling sound?

Air Trapped in Vent

The pipes extend from the drain up through the roof, transferring wastewater and odour away from the house. Gurgling can occur if the vents become clogged. When air cannot escape through vents, it forces itself through the drains. The resulting difference in pressure causes gurgling.

Previous article
What is the difference between half inch overlay and full overlay?
Next article
Can I clean blinds with vinegar and baking soda?