How to Unclog Garage Floor Drain

If your home has a garage, then there’s a good chance you also have a garage floor drain. This is an important part of your home’s drainage system, and it’s important to keep it clean so that water can flow through it properly. If your garage floor drain becomes clogged, here are a few things on how to unclog garage floor drain.

How to Unclog Garage Floor Drain

Summary: To unclog a garage floor drain, remove any debris, such as leaves or dirt, from the surface of the drain. Then, use a plunger to clear any blockages; ensure that you first cover any nearby drains or openings so the pressure only affects the blocked drain. If the plunger does not work, try using a plumber’s snake or drain auger. If none of these methods are successful, consider calling a professional plumber for assistance.

Why Garage Floor Drain Clog?

Garage floor drains can be a great convenience, allowing you to wash your car or remove snow and ice without making a mess. However, these drains can also become clogged with debris, causing water to back up and flood your garage.

There are a few reasons why garage floor drains might become clogged. The first is that they are often located near the driveway, where leaves, dirt, and other debris can be carried in on your car tires.

In addition, these drains are often used to drain chemicals such as oil and antifreeze, which can build up and block the drain over time. If you have a garage floor drain that is frequently clogging, there are a few things you can do to help prevent it.

Garage Located Near the Driveway

Why It’s Important to Unclog the Garage Floor Drain?

A garage floor drain is a great way to keep your garage clean and dry, but it can also be a magnet for dirt, grime, and debris. If the drain becomes clogged, it can cause water to back up onto the floor, creating a slip and fall hazard.

In addition, a clogged drain can also lead to flooding if heavy rains occur. As a result, it’s important to unclog the garage floor drain regularly.

What Kind of Drain Do You Have?

Standard Floor Drain

This is a drain located on the floor and typically has a grate on top. It is used to remove water from garages, basements, and other areas. If this type of drain becomes clogged, you may be able to clear it by using a plunger.

Remove Water From Garage

Trench Drain

A trench drain is a deep, narrow channel designed to carry away large amounts of water. It is usually installed in concrete and can be used in residential and commercial applications.

Sink Drain

A sink drain is the most common type of drain and is easy to unclog. All you need is a plunger.

Common Causes of Clogged Garage Floor Drains

Lack of Maintenance

One of the most common causes of clogged garage floor drains lack of maintenance. As a result, drains tend to get clogged with dirt, leaves, and other debris. If not regularly cleaned, this buildup can lead to a blockage.


Another common cause of clogged garage floor drains the weather. Heavy rains or snow can cause water to back up and flow into the drain, resulting in a blockage.

U-Shaped Pipe Trap

The U-shaped pipe trap is one of the most common causes of clogged garage floor drains. The curve in the pipe creates a water seal that can easily become blocked with debris.

How to Unclog Garage Floor Drain (Standard Garage Drain)

Step 1: Gather Necessary Tools and Equipment

Before beginning the process of unclogging a garage floor drain, gather the necessary tools and equipment. You will need a plunger, a pipe snake or auger, a bucket, rubber gloves, a screwdriver, a flashlight, and a garden hose.

Step 2: Clear the Area Around the Drain

Remove any objects, debris, or standing water from the area surrounding the garage floor drain. This will provide a clear workspace and make it easier to access the drain.

Step 3: Inspect the Drain Cover

Examine the drain cover for signs of damage or corrosion. If the cover is damaged, it may need to be replaced. In some cases, debris can become lodged in the drain cover, preventing water from flowing through. Clean the drain cover thoroughly and ensure that it is free of debris.

Step 4: Remove the Drain Cover

Use a screwdriver to remove the screws securing the drain cover. Carefully lift the cover and set it aside. If the drain cover is stuck, use a flathead screwdriver to gently pry it loose.

Step 5: Inspect the Drain

Use a flashlight to inspect the interior of the drain. Look for any visible clogs or obstructions. In some cases, the clog may be located near the drain’s surface and can be easily removed by hand or with a pair of pliers.

Step 6: Use a Plunger

If the clog is not immediately visible or accessible, try using a plunger to dislodge it. Place the plunger over the drain opening and press down firmly, creating a seal. Pump the plunger up and down several times to create suction and pressure, which may help to break up and dislodge the clog.

Step 7: Use a Pipe Snake or Auger

If the plunger is unsuccessful in removing the clog, a pipe snake or auger may be necessary. Insert the snake or auger into the drain, feeding it through the pipe until it reaches the clog. Rotate the snake or auger to break up and remove the obstruction. Be sure to follow the manufacturer’s instructions for proper use and safety precautions.

Step 8: Flush the Drain with Water

Once the clog has been removed, use a garden hose to flush the drain with water. This will help to wash away any remaining debris and ensure that the drain is flowing freely. If possible, use a high-pressure nozzle on the hose to provide additional force for clearing the drain.

Step 9: Clean and Replace the Drain Cover

Before replacing the drain cover, clean it thoroughly to remove any accumulated dirt, debris, or residue. Reattach the drain cover using the screws that were removed earlier, ensuring that it is securely fastened.

Step 10: Test the Drain

To ensure that the drain is functioning properly, pour a bucket of water into the drain and observe how quickly it flows through. If the water drains slowly or backs up, there may still be an obstruction in the pipe. In this case, repeat the process or consider contacting a professional plumber for assistance.

Step 11: Maintain Regular Drain Cleaning

To prevent future clogs and ensure the proper function of your garage floor drain, establish a regular cleaning schedule. Periodically remove the drain cover and inspect the drain for signs of debris buildup. Clean the drain cover and the interior of the drain as needed. Additionally, consider using a drain maintenance product designed to break down grease, soap scum, and other common drain clogging substances.

Step 12: Address Potential Drainage Issues

If your garage floor drain consistently becomes clogged, there may be underlying drainage issues that need to be addressed. Inspect your garage and property for signs of poor drainage, such as standing water or water pooling near the foundation. Addressing these issues may involve grading your property, installing a French drain system, or making improvements to your gutter and downspout system. In some cases, you may need to consult a professional drainage expert or plumber for assistance in identifying and resolving these issues.

Step 13: Monitor for Signs of Damage

In addition to maintaining a regular cleaning schedule, it’s essential to monitor your garage floor drain for signs of damage. Damaged or cracked pipes can lead to clogs and other drainage problems. If you notice any signs of damage, contact a professional plumber for an inspection and necessary repairs.

Step 14: Consider Upgrading Your Drainage System

If your garage floor drain is outdated or frequently experiences issues, consider upgrading your drainage system. Modern floor drains often feature improved designs and materials that can prevent clogs and provide more efficient drainage. A professional plumber can help you select the best drainage system for your garage and ensure proper installation.

Step 15: Educate Yourself on Proper Drain Care

Understanding proper drain care can help prevent clogs and keep your garage floor drain functioning correctly. Avoid disposing of grease, oil, paint, or other substances that can solidify and create blockages in your drain. Additionally, be cautious when using chemical drain cleaners, as they can damage pipes and harm the environment. Opt for environmentally friendly alternatives or mechanical methods, such as plungers or pipe snakes, to clear clogs.

By following these steps and establishing a regular cleaning and maintenance routine, you can ensure your garage floor drain remains unclogged and functional. Properly functioning garage floor drains are essential for preventing water damage, keeping your garage clean, and maintaining a safe and comfortable workspace.

How to Unclog Garage Floor Drain Snaking the Drain

1. Open the Clean-out Plug

The clean-out plug is located near the garage floor and will have a cap covering it. Remove the cap and use a garden hose to flush out any debris blocking the drain.

Clean Out Plug is Located Near the Garage

2. Insert the Snake

If the flushing doesn’t clear the drain, insert a snake into the opening. The snake is a long, metal tube with a spiral head on one end that can be purchased at most hardware stores. Guide the snake down the drain and turn it as you go to help break up any clogs.

3. Turn the Snake

Once the drainage is clear, slowly turn the snake in the opposite direction of the flow. Doing this will help remove any remaining clogs and debris from the drain. Be sure to keep an eye on the snake as you turn it in case it gets stuck. If it does, stop turning immediately and proceed to step four.4.l

4. Pull It Out

If the clog is close to the drain, you should be able to dislodge it by pulling on it. Reach down into the drain and try to grab the clog. If you can, pull it out and dispose of it properly.

If the snake becomes stuck, you will need to pull it out. To do this, slowly back the snake out while keeping an eye on the drainage. If the clog is still there, you will need to go back to step three and try again.

5. Move on to the Clean-out Pipe Valve

If the clog is too far down the drain for you to reach, it’s time to move on to the clean-out pipe valve. This is a valve located at the end of the drain that allows you to clear the line without removing the entire pipe.

Clean-out Pipe Valve

To clear the clog, turn the valve until it’s in line with the pipe. Doing this will allow you to pour water down the drain and help clear the clog. Be sure to have a bucket or container ready to catch the water as it comes out. Once the clog is cleared, turn the valve back to its original position.

6. Flush with Hot Water

Pour a pot of boiling water down the drain to help dissolve whatever is causing the clog. Be sure to use caution when handling hot water, and avoid contact with your skin. Pour slowly, so the water has time to work its way down the drain. If the clog persists, move on to the next step.

7. Replace the Plug

Once the clog has been removed, replace the plug. If the clog is not too severe, this should take care of the problem. If it is a more serious issue, you may need to call a professional.

8. Follow-up Flush

After replacing the plug, flush the drain with hot water. This will help remove any remaining debris and take care of the problem.

Now that you know how to unclog garage floor drain, you can take care of the problem yourself. If the clog is not too severe, the tips listed above should take care of it. But if it is more serious, you may need to call a professional. They will be able to diagnose the issue and take care of it for you.

How Do You Unclog a Concrete Floor Drain

There are several ways to unclog a concrete floor drain. One way is to use a plunger. First, make sure that enough water is in the drain to cover the plunger. Insert the plunger into the drain and push and pull it up and down. This will create suction that can help to loosen the clog. Another way to unclog a concrete floor drain is to use a plumber’s snake.

This is a long, flexible piece of equipment that can be inserted into the drain to reach the clog. Once the clog has been located, the snake can be used to break it up and clear it out of the drain. If neither of these methods works, you may need to call a plumber to clear the clog.

How Do You Unclog a Main Drain

One of the most common plumbing problems is a blocked main drain. This can be caused by a buildup of soap scum, hair, grease, or even tree roots. Trying to unblock a drain can be messy and frustrating, so it’s usually best to call a professional. However, if you’re feeling brave, there are a few things you can try.

First, pour boiling water down the drain to melt any grease causing the blockage. Next, use a plunger to try and break up the blockage. If neither of these methods works, you’ll need to remove the drain cover and use a plumber’s snake to clear the blockage. Once you’ve managed to unblock the drain, keep it clear by regularly pouring hot water down it.

Why Is My Floor Drain Backing Up?

One of the most common plumbing problems is a backed-up floor drain. There are a few reasons why this might happen, but the most likely culprit is a blockage in the drain pipe. This can be caused by anything from soap and hair buildup to objects that have fallen into the drain.

In some cases, the blockage may be located further down the pipe, in which case you’ll need to call a plumber to clear it. However, if the blockage is close to the floor drain, you may be able to clear it yourself using a plunger or an auger.

Once you’ve cleared the blockage, be sure to take steps to prevent it from happening again, such as using a drain screen or regularly cleaning the drain. Keep reading for more information about how to unclog garage floor drain.

Frequently Asked Question

Should a Garage Floor Have a Drain?

Yes, a garage floor should have a drain. If your garage floods, the water will damage your car and the items in your garage. A floor drain will help to prevent this from happening.

Why Is There a Hole on My Garage Floor?

There may be a hole in your garage floor because of a clogged garage floor drain. If this is the case, you will need to unclog the drain to fix the problem. One way to do this is by using a plunger. Put the plunger over the drain and plunge it up and down several times.

Where Do Most Garage Floor Drains Go?

Most garage floor drains go into a sewer line, but some connection to a septic tank. Call a plumber to unclog it if your floor drain goes into a sewer line. If your floor drain goes into a septic tank, you will need to use a plunger to try to clear the clog.

How Do You Flush a Floor Drain?

There are a few different ways that you can flush a floor drain. One way is to pour hot water down the drain. You can also pour vinegar or baking soda down the drain.


If you have a garage, it’s likely that at some point, you will need to unclog the floor drain. This is an easy process that can be done with a few simple tools. Follow these steps on how to unclog garage floor drain and get rid of any standing water.

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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