How To Fix A Gurgling Kitchen Sink

how to fix a gurgling kitchen sink

Do you hear gurgling sounds from your kitchen’s sink?
If yes, then there could be a problem in the drainage pipe and its venting system.

This problem is mostly caused by the flow of air bubbles towards your sink drain due to blockage.

When the sink drain pipe gets blocked, air bubbles emerge and come out through the opening of the sink.

Another reason for this problem could be the blockage of the ventilation system.

The solution to this problem could be as simple as just flushing the sink. While in other cases, it could involve more hardships or you may even have to hire a plumber.

And now it’s time to guide you to how to fix a gurgling kitchen sink.

Table of Contents

How To Fix A Gurgling Kitchen Sink In 5 Easy Ways

You can solve the gurgling kitchen sink problem in five ways.

Identifying which sinks are gurgling in your house could help you to decide which option to try first.

If you see that the gurgling is in your kitchen’s sink only, then the issue is in the pipes of that sink. I would recommend starting with the P-trap.

1. Fix The P-Trap

The U-shaped pipe under your sink is known as P-trap.

It acts as a barrier by holding the water to prevent sewer gasses coming into your home. If there is an improper distance between the P-trap and vent and the drain, it forms a space, which results in gurgling.

The entire length of all arms, tailpieces and fittings between the P-trap and your drain should be 24 inches (or less).

If the length your drainage pipe is 1.5 inches, the vent should be fitted 42 inches (3.5 feet) from the trap’s lower part.

Now if you vent is nearer than that, you need to create more distance by modifying the piping.

fixing the p-trap

2. Check The Air Admittance Valve

In other cases, a drain might have an air admittance valve instead of a vent. It is positioned under the sink and activated by pressure.

This valve is used to get rid of the conventional pipe and roof venting penetration.

Check that if the air admittance valve is broken or clogged. Mostly, these valves work properly for 20 to 30 years.

If the valve works only a few years, there could be a problem in your plumbing system.

3. Flush Home's Main Vent

The main vent for most home is located on the roof above the primary bathroom.

You can clear the main vent by either shooting the water into the vent opening (by a significant amount of force) or by using sewer auger.

For this method, we would recommend hiring a professional because it requires roof access and specific equipment, which is a dangerous and challenging task.

4. Flush The Sink

If you don’t find any fault in the air admittance valve, main vent P-trap, then you can try this simple method.

Before going after any complex repairs, turn on your tap and run hot water for about 5 minutes. If there is a small clog in the drainage pipe, this quick method may solve your problem.

flush the sink

5. Clean The Drain

If none of the methods worked for you, then cleaning your drain could be the saviour.

Over time food debris accumulates down your sink, and this could be the issue for gurgling water.

To clean your drain, take a bowl, place it below the P-trap and remove it. It is essential that you place the bowl first because there will be water inside.

Now dump the water and any other debris into the bowl.

When it gets empty, clean the trap and replace it. A nylon brush is perfect for getting inside and clean. 

Conclusion

Now you have five methods on how to fix a gurgling kitchen sink, and they should work for the majority of the people.

If you have tried all the above methods and none of them worked, it is time to call a professional.

There could be a further blockage in your pipes or an error while installation, which got overlooked earlier.

You shouldn’t ignore the problem if you can’t fix it by yourself.

It may seem a small problem to you but could result in expensive repairs later.

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