Gurgling sink when toilet flushed
A toilet is the most useable place in every house. Not only it serves our purpose also saves us from being sick from diseases. Gurgling Sink When Toilet Flushed
So, cleanliness is necessary for health. As any guest come to your home and wish to use the toilet.
A dirty bathroom presents a worse impression on people. Also, if the toiletries are not operating correctly, later no one can use them.
One of the common problems of the toilet is the gurgling sink when the toilet is flushed. Gurgling is the most irritating problem too. Though it can’t let you feel embarrassed in front of people and eliminates bad smell, you must fix this gurgling issue.

Signs of Blocked Drains:
One of the common issue in the home is clogged drain. Sometime is cause the slow draining showers or bathtubs. The signs of blocked drains given below-
Gurgling Sounds:
Gurgling sounds occur for poor venting. When traps of the plumbing method are not vented accurately, a negative pressure of the air arises. The negative pressure creates a vacuum. Then the gurgling sounds of the sink happens.
Slow draining:
One of the signs of blocked drains if your sink, bath, or shower emptying abnormally slow. Solve this problem as soon as possible, hence it will typically increase.
Bad Smells:
If hair and debris fall, they will block the pipes. As time passes they begin to decompose and spread funky odour through the air.

Changes in flush:
When the toilet is flushed, a blocked drain may raise the water level higher.
What Are the Causes of a Gurgling Sink When Toilet Flushed?
When you flush your toilet, water needs to leave. But it cannot flow properly by the air, and the gurgling of the sink begins.
For getting a flexible exit, every toilet must have a venting system. The proper venting fixture will help to drain water through the roof.
If your toilet sinks start gurgling when the toilet is flushed, it means water is getting clogged in the P-trap. You should solve the problem as soon as possible to prevent the funky smell of sewer gases.
The causes of the gurgling sink when toilet flushed given below-
Shower Drain P-Trap:
A gurgling drain may be caused by a shower drain, while it does not have a p-trap. The p-trap prevents the bad smell from sewage gases into your bathroom.
Drain Waste Vent Systems:
Drains of the toilets can form a closed system. When you hear gurgling, it means that the vents are blocked. If you don’t clear the vents, the air suction through pipes can empty the P- trap and causes funky smells in your house.
Clearing Vents:
Blocked roof venting is a common problem caused by debris, leaves, or sticks. Sometimes, debris falls and remains blocked in the bend. Clear the debris to solve the problem. Water spray is the only way to clean the venting. If the technique cannot solve the problem, hire a professional.
Tree Roots:
Sometimes, tree roots spread their roots through breaking pipes in search of water. It may cause blockage in the bend.

Wet Wipes:
Manufacturers say wet wipes flushable. They don’t remain attached in the drains. But it’s a lie!
Wet wipes, toilet paper, sanitary accessories, and nappies may attach to the vent pipes. They block the drain and cause a gurgling sink.
Why Does Gurgling Sink May Consider as a Serious Issue?
A blocked plumbing system can be prevented if you consider the gurgling sink when the toilet flushed problem seriously. If you keep using the blockage toilet paper, and rust will enlarge the clog.
When a complete blockage makes the issue worse, you can use a plunger, auger before the problem becomes worse. The materials are available in local hardware stores.
An electric sewer snake can destroy your whole plumbing fixtures while you can not use the sewer snake accurately. You can use vinegar and hot water as a use a homemade cleaning solution.
How to Solve The Gurgling Sink When Toilet Flushed?
The gurgling sink may increase if you don’t get a solution for it. Lacking venting pipes creates water blockages. The gurgling will be produced when water passes through the P-trap pipes.
Here are some solutions to the problem:
You need to buy the following materials to fix the gurgling sink-
- Plunger
- Pliers
- Garden hose
- Sewer auger
- Valve for air-admittance
- Ladder

Step 1: Plunge Your Toilet
Plunging is the quickest process to fix the gurgling sink. In this process, close the sink drain with tape. Then plunge your toilet.
First, close the sink drain, cover the overflow tubes with duct tape and plunge the toilet. A partial blockage in the toilet waste pipe can force air through the sink drain, and plunging may remove the blockage.
Covering the sink drain keeps the force of the plunger in the vent pipes.
After plunging, open the drain and flush your toilet. If the sink still gurgles, start plunging your toilet again.
Step 2: Clear Venting System
Vent opening may be blocked often for some reasons. While you hear gurgling, climb on the roof and check the vent opening. Leaves, debris, a stick may block the vent opening. Clear the venting bend, and if it has a screen, clear the screen too.
You need to clear the venting system to stop the gurgling problem. You can clean the blocked vents by using a garden hose.
Step 3: Clearing vent with garden hose
A garden hose can clear out the debris of the venting pipe. Just spray water with a garden hose, and it will clear your blocked venting opening.
Water backing up from the vent is a clear sign of blockage. It gives you a reminder that you have to find another way. A sewer auger may help to get rid of this.
Step 4: Sewer auger: Gurgling Sink When Toilet Flushed
First, put the sewer auger into the vent opening. Unwind the auger until you feel resistance from the blockage.
Once you feel the resistance, crank the handle and keep pulling the auger out. It will help to clear all debris out.
When you feel you cleared the blockage, spray more water in the vent and check the water flow.
If water does not come back out, it means there is no debris left in the bend. You finally solve your gurgling sink problem.
Step 5: Replacing a valve
If none of the above ways can work, unscrew the cheater valve beneath the toilet sink and replace it with a new one.
Step 6: Using chemical solutions
If you’ve failed to prevent gurgling, use a chemical solution. It’s an easy way to remove clogged vents.
Simply pour a chemical solution in the drain and see the magic. This solution removes the blockage a few times.
Step 7: Pour boiling water:
In winter, blockage happens because of the frost. The vents may freeze, and air cannot flow properly causes gurgling sinks.
You can pour boiling water through the vent pipe and fix the gurgling problem.
Final Verdict:
Finally, Proper knowledge about the bathroom plumbing system is essential for solving gurgling sink problems. Gurgling sink, shower, or toilet all happen because of the improper venting system. When you hear the gurgling noise, solve this problem quickly.
In this article, we enlighten you about the gurgling sink when the toilet is flushed and the ways of fixing it.