Toilet Gurgling When Flushing

Toilet Gurgling When Flushing With Simple 7 D-I-Y Steps (Complete Guide)

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The toilet is the most-used amenity in our homes, which helps us deal with our bodily call of nature easily and quickly.

That’s why we all expect our toilet to function correctly every time we use them, Right! So if you’re experiencing a gurgling toilet when flushing then you are in the right place.

We are going to take an in-depth look at all the common causes of a toilet that gurgles every time one flushes, toilet burps big bubble when flushed and toilet that bubble and won’t flush.

Now let’s explore in particular all these issues and the correct way you can fix them without the need to call a plumber.

What Causes the Toilet to Gurgle before, when or after Flushing?

1. Clogs

A common culprit of a toilet gurgles at end of flush is caused by debris, sediments, plastic or non-flushable materials that pile up and blocked the drain preventing air from escaping either from the vent stack or sewer line.

 These obstructions always cause air to escape backward – making that dreaded gurgling sounds. 

The best way to clear minimal blockages in the toilet bowl is by using a toilet plunger (View The Best Toilet Plunger on Amazon)

This tool will successfully remove any blocks caused by tissue, hair or poop in the toilet drain, that is preventing air from escaping the vent stack or sewer line whenever one flushes the toilet.

For an extreme remote blockage either in the toilet bowl or the toilet drain this requires snaking. A toilet auger (View The Best Toilet Auger on Amazon) is the best tool for this job, the device works by rotating the handle clockwise while creating a screwing action that penetrates through the clogs disintegrating it completely.

Related Post: Best Toilet Auger

2. Air in the Lines

The leading cause of a toilet that burps big bubbles whens flushed and a myriad of awkward sounds is an indication that air is filled up in the toilet drain and down the sewer line resulting in a constant gurgling and bubbling in the toilet.

To successfully remove all this air build-up, first use a toilet plunger to pump out excess air in the toilet drain and remove any clogs down the toilet bowl and drain, this will reduce the spurt(air gush out in a sudden) and if the problems persist, check for plumbing leak that lead to your toilet drain from your sewer line(plumber services will be needed).

Read: Top Simple Ways to Unclog a Toilet

3. Sediment Buildup

The main cause of gurgling noises when flushing the toilet is caused by Calcium, magnesium and iron buildup, a high concentrate of these minerals over time form a red-orange fur inside the toilet tank and water inlet pipes, a residue left behind by Hard water.

These sediments buildup clogged tanks equipment especially at the entry and exit point causing the water to gurgle and spurt when flushing the toilet.

These minerals buildup appears inside the toilet tanks and water lines form a red-orange fur which tends to prevent the smooth flow of water every time one flushes the toilet.

To avert the gurgling noise when flushing the toilet it’s advisable to clean out any noticeable iron bacterial buildup inside the toilet tank. One can use a toilet brush and a bleaching agent to remove all the red-orange fur.

4. Vent Stack Blockage

Toilet vent stack helps remove odor and gas between the sewer line and toilet, mostly used to regulate air pressure inside the toilet drain pipes.

If your vent stack is blocked with stacks of leaves, birds nest, branches and dust buildup, this will affect air circulation within the toilet drain and vent stuck.

So whenever one flushes the toilet the clogs will hinder air circulation inside the plumbing system affecting the rate at which the toilet drains causing the gurgling sound inside the toilet bowl and tank.

A possible solution, one needs to examine the vent stuck from the top if there are stacks of leaves and branches clogs, which can be easily removed by a hook and wire.

5. Tank Equipment – Toilet is bubbling and won’t flush

Toilet tank gurgles are annoying and can persist, first let’s start by looking at the source of the problem, the most probable culprit of toilet tank gurgle is when a float ball and fill system are faulty and struggling at the same time in most cases when one flushes the toilet.

One should make sure the float ball works correctly every time the water fills the tank and when the toilet is flushed, the ball lock assembly should not have iron-orange fur buildup which generally prevents the float ball from working correctly. Having said that the water level should always be 20 cm below the overflow tube.

Finally, check for any corroded or malfunction components in the tank, try and remove all the corrosive buildup with a brush and a bleaching agent. If the problem persists, contact a professional to check the problem.

Also Read: How To Dissolve Poop Stuck In Toilet



What does a gurgling toilet mean?

Toilet gurgle is awkward sound produce either from the toilet bowl or tank caused by air escaping backward due to blockages or malfunction components. For blockages, this might be from the sewer line, vent stack or toilet bowl.

This forcefully negative air pressure will push its self back into the toilet bowl making the water to bubble producing a bubbling sound.

How do you fix a slow draining toilet?

Experiencing a toilet that is taking ages to drain once you flush? Here are simple do-it-yourself steps that can aid you fixed any issues without calling a plumber.

Common reasons for a slow draining toilet and how to fix them:

Clogs in the pipes

A toilet that is slow to drain when flushed might be an obstruction in the pipes that is preventing water from flowing correctly. A plunger is the best tool that can dislodge any clog in the toilet bowl and drain.

Mineral buildup in the toilet tank

Most toilet tanks are made of metal and plastic, which are prone to iron-orange fur or even sediment build up inside the toilet tank.

This mineral buildup tends to affect the flapper valve, which creates a watertight seal that holds water until someone flushes the toilet.

The mineral deposits will hinder the flapper from working correctly, thereby affecting the rate at which the water flushes out. Having said that, replacing these parts isn’t too expensive.

Toilet flush mechanism

Over time the toilet systems tend not to work correctly at it should, especially the flapper or the chain connected to the flapper. If the chain that is connected to the flapper is tangled, broken or the flapper is loose, this will affect the rate at which the toilet flushes.

Check to see if the chain is tangled or broken; one can untangle the chain so that it can work correctly.

Why is my toilet blowing bubbles

A common culprit of a bubbling toilet might be caused by a clogged vent stack. The vent stack allows the flushed water from the toilet; the air needed to drain appropriately. Also, vest stack acts like a breather that prevents horrible smell back in our bathrooms,

So to avoid toilet from blowing bubbles, first check if the vent stuck is clear from clogs like bird-nest, branches, leaves etc. one can climb to the roof and check is the vent stuck is clear from any blockages.

If any, one can remove by hand or a hook this will aid you to remove clogs that are far and final step flush the line with a garden hose to clear any remaining clogged.

Air bubbles in toilet tank

These small tiny bubbles that seem to sit in the toilet tank are mainly caused by a water supply line, water that contains air regularly travels inside the toilet tank, the air which is unable to escape and become visible as bubbles inside the floor of the toilet tank.

This is evident when the toilet tank refill after flushing the toilet, one can hear a sputtering sound as water shoots through the fill valve in to the tank.

How to stop bubbles inside the toilet tank:

Even though air bubbles isn’t a something one should be worried about, the only remedy to get rid of them is by flushing the toilet multiples times throughout the day, as water flushes those tiny air bubbles will be exposed to air allowing them to escape.

Why does my toilet spit water

This happens when the toilet bowl isn’t receiving the required amount of water when one flushes the toilet, maybe the flush valve refill tube is not properly fitted or the fill valve is not working properly, so this is affecting the required amount of water reaching the toilet bowl forcing the toilet to spit.

The most probable solution is to reattach the refill tube firmly in place if isn’t working the way it should then replace the fill valve.


A gurgling toilet is not an indication that you need a replacement. It is a common problem and more prone to happen every time, mainly when your vent stuck in clogged. By keenly following those 5 steps above am sure in future it won’t be pain and rest assured that you can fix a gurgling toilet fast and easily without calling a plumber. Toilet bubbles

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Toilet Gurgling When Flushing
Here we have listed the top cause of a Toilet Gurgling When Flushing: Clogs. Air in the Lines. Sediment Buildup. Vent Stack Blockage. Tank Equipment.
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