I know you are suffering from the problem of slow draining kitchen sink. According to my information, this problem is often caused by kitchen sink drains slowly but not getting air.
This is a headache-like problem in which you neither feel like working in the kitchen nor like cooking.
This is the problem of airflow that does not allow the water in the kitchen sink to flow freely.
So, here in this post, I will give you detailed information about how you can identify the causes of such air-related kitchen drain problems and how you can fix them yourself.
In some situations, if you do not solve this problem, we will also give information about when you should take the help of a professional plumber.
Since I know how frustrating this problem is, I must provide a solution as a Sink Tips author.
Understanding The Kitchen Sink Drains Slowly Not Getting Air Problem
At some point, you may face the problem that your kitchen drain is not clogged but draining slowly.
So this problem can mainly occur if the airflow in the kitchen sink drainage line is improper. Your kitchen sink’s drain system relies on proper water flow and airflow.
To understand this problem, imagine your drain pipe as a straw. When you suck water through a straw, the air above the straw allows for smooth flow.
But if you squeeze the bottom of the straw, suddenly, you will have a harder to suck the water.
Similarly, proper airflow is essential to maintain proper pressure for smooth water flow in your kitchen drain. So the kitchen sink gets water slowly without getting air ventilation.
Signs You Have a Slow-Draining Sink Not Getting Proper Air
There are a few signs that a slow kitchen sink drain is not getting enough air, which I have listed below.
- Slow Draining: The main symptom is slow draining, especially when you remove the clog.
- Gurgling Sound: Air is struggling to escape the overflow and drain.
- Water backing up: In severe cases, water might rise in your sink or connected fixtures.
If any of the above signs of slow draining of your kitchen sink are evident, here are the reasons and steps we can take to resolve them.
Finding the Culprit of Slow Kitchen Sink Which is Not Getting Air
After knowing the signs of slow draining of the kitchen sink when not getting air, let’s look at the causes that are responsible for it individually.
- Check the overflow hole: If water comes out of the overflow hall when the main drain is slow, that suggests a vent problem.
- Locate the vent pipe: Follow the pipe under your sink to where it connects to the vent, usually behind the wall or on the roof.
- Inspect for blockages: Check the vent openings for debris, such as leaves, twigs, or bird nests that could block air.
- Check The Vent Pipe: Also, check the vent pipe thoroughly to ensure it is not twisted, disconnected, or broken.
- Run water in nearby sinks: If water drains properly from another sink connected to the same drain line, this indicates a vent blockage in your sink with a slow drain.
- Listen for noises: Keep your ear close to the drain while the water runs. If there is a Gurgling or sucking noise, it suggests a problem with the vent pipe that is blocking proper airflow.
Now that you have found the right culprit, let’s look at what you should do and how to solve the problem properly.
How Do I Fix a Slow-Draining Kitchen Sink that is Not Getting Air?
Now let me tell you from my experience how you can try to solve this problem yourself.
Clear Visible Debris From The Vent Opening
Make sure you clear your roof kitchen sink vent of any debris by following the steps below:
- First, grab a sturdy ladder to reach the vent opening safely.
- After that, safely clear debris from the roof vent.
- Remember to wear protective gloves and eyewear while cleaning the vent.
- Use your hands or tools, like tongs, to remove leaves, nests, and debris.
- If debris is stuck in, use a flexible long drain brush. (Never use metal tools in the vent opening)
- Now, check the interior of the vent pipe with a flashlight. If you see any debris there, remove it safely.
- Avoid using flammable materials near the vent to prevent accidents.
- If necessary, rinse away the remaining debris with a hose.
This way, you can clear your vent opening of debris by following the steps I suggested above and eliminate air clutter in the kitchen sink drainage.
Below are some examples of the tools you’ll need to troubleshoot this complete DIY process:
Snake the Vent Pipe
After that, remove the loose waste from the vent pipe through the snack.
Do not remove the ladder; they will also be needed for this job. Be careful not to place the ladder directly on your vent pipe.
Wear protective gloves and goggles before climbing the ladder, and have someone nearby to steady the ladder.
Now follow the below steps,
- Now, carefully insert the drain snake into the opening of the vent pipe. You angle it downward into the vent.
- Then rotate the handle of the drain snake to extend the snake cable down the vent pipe, applying gentle pressure as you do so.
- If you encounter resistance, continue to turn the handle while pulling back the cable with the clog hanging on its front end.
- The clog should be clear once the cable rotates freely through the entire vent length.
- Now, use a bucket to collect the debris thrown up by the snake and dispose of it properly.
- Then, flush the vent with a hose pipe to remove any remaining debris before repeating the process.
- Finally, thoroughly wash the drain snake with water after using it.
If you follow my process, I guarantee you will never have an air problem in your drainage line, and that slow-draining problem will be solved.
Before undertaking the above process, keep some of the following tools.
Reattach Any Loose Sections of The Vent Pipe
Now, if the connection of the vent pipe is loose, we will take the following steps to fit it.
- First, visually inspect the area and locate loose vent pipe sections under the sink or behind the walls.
- Look for any gaps between fittings to identify any misalignment in the pipe.
- Then, realign the pipe to match the fitting it came from, ensuring it is inserted fully and straight.
- For slip or loose joints, hand tighten the nut first and then use pipe wrenches to tighten it firmly. Apply pipe joint compound to the threads for a secure seal.
- If the bracket and clamp are loose on the pipe, remove them first, then tighten them with a screwdriver.
Thus, you can properly manage the vent pipe that affects the airflow of the kitchen sink. The tools used are shown below.
Clean the Drain Plug and Solve the Issue Of Overflow
Now let’s look at the problem of drain plug and overflow hole and take appropriate action.
First, we will check and clean the drain plug.
- First, place a bucket underneath the kitchen sink to catch any water.
- Then, remove the drain plug by turning it counterclockwise. Set it aside.
- Check for any hair or debris caught in the drain plug. Clean with an old toothbrush or pipe cleaner.
- Now, Pour about 1 cup of baking soda down the drain. Follow with 1 cup of vinegar and let fizz for 5-10 minutes.
- Flush with hot water to clear the mixture of vinegar and baking soda. Test the drain plug by replacing it and running the water.
- Use a zip-it-style drain cleaner to pull out hair if it still seems blocked.
Now, we will try to solve the problem of the overflow hole so that air movement is done properly.
- Start to check the overflow and shine a flashlight up into the hole. Use gloves and remove any debris present with a flexible brush.
- Now, pour hot water into the overflow hole to flush it out. Repeat it process if necessary.
- Replace the drain plug once the overflow and drain are clear. Test for improved water drainage.
I have given recommendations below, which are the best tools for this.
Install an Air admittance valve (AAV)
Now, if the kitchen drain is slow due to lack of air, then as an alternative, use an Air admittance valve; you will get better results.
You can take this valve according to the size of your drainage pipe.
Oatey Air Admittance Valve
White PVC Sch. 40 Adapter, Sure-Vent 1-1/2 in.–2 in. 160 Branch, 24 Stack DFU
- First, Turn off the water supply and drain the sink pipes completely.
- Locate the existing vent pipe under the sink and mark where you will cut it to install the AAV.
- Use a pipe cutter to cut the vent pipe above the drain tee fitting.
- Then, Dry fit the AAV valve pieces and additional vent pipe fittings to ensure proper fit.
- Apply pipe joint compound or tape to the AAV and vent pipe connections.
- Attach the AAV valve pieces using the slip nuts and tighten them with an adjustable wrench.
- After that, Attach additional vent pipes between the AAV and existing vent using fittings.
- Check all joints for tightness and leaks before turning the water supply back on.
- Turn on the faucet and check for improved drainage. Listen for the AAV to open with air intake.
- Attach the provided AAV vent terminal to protect the valve from debris.
Follow the AAV manufacturer’s instructions closely. Ensure proper slope on horizontal vent pipes.
Let me know in a comment if you need any clarification or have additional tips for installing AAV valves.
FAQs
How can I tell if the problem is with my sink vent pipe?
When you face water gurgling in your kitchen sink, slow drainage, or strange sounds, you can tell your draining may indicate issues with the kitchen sink vent pipe.
Is it safe to clear debris from my roof vent myself?
Yes, clearing debris from your roof vent is safe, with proper safety precautions like using a ladder and protective gear and avoiding electrical or gas lines near the vent.
Where should I install an AAV valve?
You should install an AAV valve on the vertical vent pipe above the drain tee connection. Ensure first to read proper instructions on the manufacturer’s website or manual.
How often should vent pipes be inspected?
Experts recommend inspecting visible plumbing vents annually for blockage or damage. If you can’t access the vent, hire a professional plumber.
Can I improve venting without getting on my roof?
Yes, you can install an AAV valve under the sink or clear debris from accessible cleanouts than the roof.
Conclusion
In conclusion, understanding the importance of proper ventilation in your kitchen sink ensures drains smoothly.
By being proactive or addressing any airflow issues through my article above, you can stop your problems with dealing with slow-draining water.
Remember that if the problem is complicated and beyond your reach, don’t hesitate to call a professional plumber for help.
Also, if there is any other related problem, comment me, and I will reply immediately.
