How To Fix Airlock In Kitchen Sink Drain

How To Fix Airlock In Kitchen Sink Drain

Dealing with An airlock in your kitchen sink drain can be A frustrating experience, Causing water To drain slowly Or not at all. But fear not, As this guide will walk you through the simple steps To rectify the issue And restore your sink To its optimal functionality. An airlock occurs when air gets trapped in the plumbing, Disrupting the flow Of water. This common problem can Be easily resolved with A few basic tools And a bit of know-how. In this article, We’ll explore A step-by-step solution How To Fix Airlock In Kitchen Sink Drain, Helping you regain your kitchen’s efficiency.

What Is An Airlock In A Drainage System?

An airlock in a drainage system is a common plumbing issue that can disrupt the smooth flow of water through pipes. It occurs when a pocket of air becomes trapped, blocking the passage of water. This can lead to slow drainage and gurgling noises in your kitchen sink. When air becomes trapped, It acts as A barrier, Preventing water from flowing freely through the pipes.

What Causes Air Lock In Drain Pipes?

Airlocks in drain pipes Can result from various factors. One primary cause Is inadequate plumbing system installation. Where pipes lack the proper slope required For the unhindered flow Of both water And air. Additionally, Abrupt changes in water pressure within the plumbing system Can lead To airlocks. These fluctuations often occur when turning off the main water supply Or rapidly opening And closing faucets. The accumulation of debris, Including hair, Grease, Or foreign objects, Can exacerbate the issue By trapping air and obstructing the flow Of water.

What You Need

  • Plunger
  • Pipe wrench
  • Gloves
  • Eye protection
  • Bucket
  • Towels

01. Check For A Local Blockage

Check For A Local Blockage

Confronted with An airlock in your kitchen sink drain, Your first step should be To check for A local blockage. Commence By clearing the sink’s strainer Or stopper Of any debris Or objects that might Be Causing An obstruction. Sometimes, What appears To be An airlock could simply be A surface-level clog. Illuminate the drain using A flashlight And scrutinize For any visible obstacles Or build-up in the immediate vicinity.

02. Removal Of Drain And P-trap

Removal Of Drain And P-trap

Begin by placing A container under the P-trap To catch any water Or debris that might spill during the process. Using a pipe wrench Or adjustable pliers, Gently loosen the nuts securing the P-trap To the drain and sink tailpiece. Care and precision are essential To prevent damage To the pipes. Once the nuts Are sufficiently loosened, Slide off the P-trap. Inspect It for clogs Or debris that could be contributing To the airlock.

03. Connect The Hot And Cold Water Faucets

Connect The Hot And Cold Water Faucets

The next step involves connecting the hot And cold water faucets. Before reattachment, Ensure that both faucets Are turned off To avoid any unexpected water flow. Carefully reattach the P-trap To both the drain And the sink tailpiece, Making sure it fits securely. Using a pipe wrench Or adjustable pliers, Tighten the nuts without over-tightening To prevent damage. Once the P-trap is securely in place, Open the hot And cold water faucets. This action helps To flush any remaining air from the system, Ensuring a smooth And unrestricted flow Of water through the drain.

04. Remove The Aav 

Fix Airlock In Kitchen Sink Drain Remove The Aav 

The AAV is typically installed To prevent sewer gasses from entering your home But can sometimes lead To airlocks. Using a wrench Or pliers, Carefully disconnect the AAV from the plumbing system. Be prepared for A small release Of air pressure during this process. After the AAV Is removed, Inspect it for any signs Of damage Or clogs. Thoroughly clean it, Or if necessary, Replace it. Reconnecting the AAV ensures that your kitchen sink drain operates without airlocks, Allowing water To flow smoothly once again.

05. Use A Hosepipe

Fix Airlock In Kitchen Sink Drain Use A Hosepipe

To address the issue Of an airlock in your sink drain, One effective method is To employ a hosepipe. This straightforward approach Can help alleviate the trapped air causing disruptions in your drainage system. Start by disconnecting the sink’s trap, Typically found beneath the sink itself. With the trap removed, Insert the hosepipe gently into the drainpipe. Ensure A snug fit To prevent any air from escaping around the edges. As you gradually feed the hosepipe into the pipe, Be prepared for A gurgling sound Or bubbles As the airlock Is being released. Once you sense A smooth flow of water, You can remove the hosepipe And reassemble the trap.

06. Use A Dime

Fix Airlock In Kitchen Sink Drain Use A Dime

Sometimes, A simple dime can prove To be A useful tool in various situations. Its small size And flat profile make it ideal for tasks that require prying, scraping. Or even as an emergency screwdriver for small screws. The thin edge of A dime can help remove stickers, Labels, Or gum residue from surfaces without causing damage. It can also assist in opening tight battery compartments Or adjusting the tension On certain devices. The versatility of A dime lies in its ability To serve as A quick fix Or makeshift tool when you’re in A pinch.

07. Repair The Valves In Drains

Repair The Valves In Drains

Start by turning off the water supply To your sink To ensure A safe working environment. Next, Locate the valves under the sink, Typically positioned On the water supply lines. Carefully use A wrench To loosen And then tighten the valves slightly. This action can release any trapped air within the pipes And restore A smooth flow Of water. It’s essential To perform this task with precision To prevent any leaks Or damage. Once completed, Test your sink To confirm If the airlock has been successfully eliminated. Allowing water To flow freely down the drain. 

08. When To Seek Professional Help?

Knowing when To seek professional help For an airlock in your sink drain Is crucial, As some situations may require the expertise Of a plumber. If your DIY attempts have been unsuccessful, Or if you suspect A more complex issue, It’s time To call in A professional.Signs that warrant professional assistance include persistent blockages, Unusual odors, Or slow draining despite your efforts.

Moreover, If you’re unfamiliar with the intricacies Of your plumbing system Or encounter leaks while attempting To fix the airlock, It’s best to reach out To a qualified plumber. They possess the knowledge And tools To diagnose And address more intricate problems, Ensuring your sink drain operates efficiently And without any airlocks.

09. Best Tips For Fix Airlock In Kitchen Sink Drain

  • Check For local blockages in the drain And clean the P-trap.
  • Before reattaching the P-trap, Ensure that you turn off both the hot And cold water faucets.
  • Consider removing And inspecting the Air Admittance Valve (AAV) For damage.
  • Clean or replace the AAV As needed To address the airlock issue.
  • These steps Can help restore smooth water flow.


Fixing an airlock in your kitchen sink drain is A manageable task with the right approach. By following A systematic process, Which includes checking For local blockages. Cleaning the P-trap, And inspecting the Air Admittance Valve (AAV), You can effectively eliminate the airlock issue. Ensuring the hot And cold water faucets Are turned off when reattaching the P-trap is A crucial step To avoid trapping more air. These practical tips not only help restore smooth water flow but Also save you the hassle Of expensive plumbing services. With the right tools and A methodical approach, You can keep your sink drain operating flawlessly.


Q: Is A Plunger The Only Tool I Need To Fix An Airlock?

While a plunger is A valuable tool for fixing An airlock, It might not always Be the only tool you need. In some cases, You may need To disassemble parts Of the plumbing, Like the P-trap, And potentially remove the Air Admittance Valve (AAV) For inspection Or cleaning. Having a few additional tools, Such as A pipe wrench, Bucket, And towels, Can be helpful in addressing the issue effectively.

Q: Why Do I Hear Air In My Sink Drain?

Hearing air in your sink drain often indicates the presence Of an airlock. The trapped air can lead To gurgling Or bubbling sounds As water encounters the airlock. Addressing the issue by releasing the trapped air typically eliminates these noises And ensures proper water drainage.

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