6 Common Reasons Water Coming Back Up Your Kitchen Sink

The clogged kitchen sink drain. It’s an infuriating problem that can bring your daily kitchen activities to a screeching halt, not to mention the potential hazard of water backing up into your sink. But fear not,  for we are here to shed some light on the matter.

In this article, we shall explore not one, not two, not three, not even four, nor five, but SIX common culprits behind water backing up into kitchen sinks. But that’s not all! We shall also impart upon you some valuable advice and tips to prevent such vexing incidents from occurring in the future. So, let’s dive into this cesspool of knowledge, shall we?

6 Common Causes of Water Coming Back Up Kitchen Sink:

Water coming up the kitchen sink can be caused by many types of issues and understanding the source is the best way to find a resolution. Here are six of the most common reasons why this happens:

Clogged Drain:

food parrticles and greease build up the pipe

Clogged drains are one of the leading causes of water coming back up your kitchen sink. This occurs when food particles, grease, and other debris buildup in the pipes and prevent them from flowing freely. Over time this buildup can become so severe that it causes complete blockage of the pipe – leading to water backing up into your sink.

To avoid this scenario from occurring again, try your best not to put large food particles or grease down the sink; use a strainer to catch particles while throwing grease and oil away in trash cans. You also can set up a single bowl kitchen sink plumbing to solve food particles, grease, and other debris.

Blocked Vent Pipe:

The vent pipe is essential for allowing air into your drain system and keeping water from being sucked back up into the sink. If it becomes blocked or damaged, water may come back up the sink due to debris like leaves or other outdoor debris entering into it or weather damage from wear-and-tear. If you suspect your vent pipe may be blocked or damaged, contact a professional plumber to inspect and repair it promptly.

Broken or Damaged Pipes:

Pipes can corrode or become damaged over time due to age, wear and tear or other factors. When this occurs, water may back up in the kitchen sink – often indicative of a burst pipe or other serious damage. In this situation, it can lead to leak water in kitchen sink if you don’t fix immediately.

Corroded Pipes:

corroded kitchen sink pipes

Corroded pipes can also lead to water coming back up the kitchen sink. Over time, pipes become corroded due to exposure to water, chemicals, and other factors – this may cause leaks and other plumbing problems which could eventually result in water backing up into your sink. To avoid this from occurring, have your pipes inspected and replaced if necessary.

Main Sewer Line Blockage:

Water may be backing up multiple drains in your home, signaling a blockage in the main sewer line. This is an urgent situation that needs immediate attention from a professional plumber; blockages in this line could allow sewage to back up into your property and cause extensive property damage and health risks.

Grease Buildup:

food and grease buildup pipe

Pouring grease or oil down the kitchen sink can cause it to build up in the drain, leading to water coming back up. That is why it is essential to throw these items away kitchen sink. Additionally, running hot water down your pipes after each use helps prevent grease buildup as does regular cleaning with baking soda and vinegar.

Step by Step to Fix Water Coming Back Up Kitchen Sink

Do you struggle with water backing up in your kitchen sink? It’s not only can be frustrating, but it could lead to more serious plumbing problems as well. Here’s a step-by-step guide to help resolve this issue:

Identify the cause:

In order to properly address the issue at hand, one must first discern the root cause of the water’s obstinate refusal to vacate the confines of the sink. There are a multitude of factors that could be contributing to this aquatic inconvenience, ranging from a clogged drain to a more complex quandary nestled within the convoluted depths of the plumbing system. Thus, it is imperative that one conduct a thorough investigation in order to ascertain the culprit behind this exasperating obstruction.

Clear the clog:

If a clogged drain is the source of your backup, you can try using either a plunger or drain snake to clear it. Place the plunger over the drain and pump up and down several times; if that doesn’t work, use a snake to loosen and remove the obstruction.

Clean the pipes:

In the event that you have successfully eliminated any obstructive elements from the drain, yet the water stubbornly persists in its stubborn refusal to drain properly, it is possible that there may be an accumulation of debris within the inner workings of the plumbing system. In order to address this potential predicament, it may be necessary to engage in the removal of the sink trap for the purpose of clearing out any accumulated detritus.

Additionally, one could also attempt to employ a mixture consisting of baking soda and vinegar, the chemical reaction of which may serve to break apart any such accumulation and facilitate the resumption of proper drainage.

Check the vent:

Another conceivable factor that may impede the proper drainage of water from your sink is the presence of an obstructed vent. In order to address this potential issue, one may need to embark upon a brief expedition to the uppermost region of the edifice in question, wherein lies the vent in question.

Once located, one should take care to inspect said vent in order to ascertain whether any detritus or debris may be impeding the free flow of air. If such debris is discovered, it is necessary to undertake the removal of said detritus in order to ensure that the vent is unobstructed and able to function properly.

You can watch this to understand clearly:

Tip to Prevent Water Coming Back Up Kitchen Sink

In order to preempt any future occurrences of water backing up into the kitchen sink, there are a number of proactive measures one may take. Here are a few salient tips to bear in mind:

Avoid pouring grease or oil down the drain:

As previously stated, pouring grease or oil down the kitchen sink can cause it to accumulate in the drain and lead to water coming back up. Instead, dispose of grease and oil in the trash.

Use a drain strainer to catch food particles:

drain trainer catch food

A useful instrument in preventing the passage of food particles down the drain and the consequent formation of clogs is the drain strainer. It is important, however, to bear in mind the necessity of periodically emptying said strainer so as to avoid the accumulation of material therein, which could impede its effectiveness over time.

Run hot water down the drain after use:

A straightforward and effective way to help avert the buildup of material within the drain and maintain optimal drainage is to simply run hot water down the drain after each use. By doing so, any lingering remnants of material that might otherwise have accumulated over time are effectively flushed away, leaving the drain free and clear for future usage.

Regularly clean the drain with baking soda and vinegar:

Baking soda and vinegar can be an easy, natural way to clean the drain and prevent buildup. Just pour half a cup of baking soda down the pipe followed by half a cup of vinegar, let sit for several minutes, then rinse with hot water.

Don’t flush non-degradable items down the toilet:

It is imperative to exercise caution and good judgement when disposing of non-degradable items such as wipes or feminine hygiene products, as flushing these items down the toilet can cause blockages within the sewer line. In turn, these blockages can lead to water being forced back up into the kitchen sink, resulting in an inconvenient and unpleasant situation.

As such, it is highly recommended to dispose of such items via appropriate means, such as through the use of a trash receptacle, in order to prevent any such complications from arising.

Schedule regular plumbing maintenance:

Regular plumbing maintenance can help identify potential issues before they become major ones. Moreover, it can prevent others problem such as leaking, gurgling,… A qualified plumber can inspect your pipes, drains, and sewer line to identify any necessary repairs or replacements and provide recommendations.


In conclusion, water coming back up the kitchen sink can be a frustrating issue but there are several ways to prevent it.
Avoid pouring grease or oil down the drain, use a strainer, run hot water down after use and regularly clean with baking soda and vinegar.
If this problem persists, it could be indicative of more serious issues requiring professional plumbing assistance.


What causes water to come back up my kitchen sink?

A clogged drain or pipe is the most common cause of water coming back up your kitchen sink.

How do I know if my kitchen sink is clogged?

Signs of a clogged kitchen sink include slow draining water, water backing up into the sink or nearby drains, and gurgling sounds.

What can I do to prevent my kitchen sink from getting clogged?

Some ways to prevent a clogged kitchen sink include disposing of food scraps in the garbage, using a sink strainer to catch debris, and avoiding pouring grease down the drain.

Can a clogged kitchen sink lead to more serious plumbing problems?

Yes, if left untreated, a clogged kitchen sink can lead to more serious plumbing problems such as burst pipes or water damage.

What are some signs that my kitchen sink and pipes need to be cleaned?

Signs that your kitchen sink and pipes need to be cleaned include slow draining water, foul odors, and gurgling sounds.