How to Install a Countertop Dishwasher Under the Sink

Installing a countertop dishwasher under the sink is a great way to save space in your kitchen. This article will show you how to install a countertop dishwasher under the sink. First, remove the cabinet doors and drawer from below the sink. Then, lay the dishwasher on its back and measure the distance from the left side of the dishwasher to the edge of the cabinet opening.

Cut a piece of wood that size, and fasten it to the inside of the cabinet with screws. Next, cut a hole in the countertop for the dishwasher’s faucet, ensuring that it is big enough for both faucet shanks. Finally, install the dishwasher by reversing these steps. Enjoy your new space-saving appliance! Read on for more information.

How to Install a Countertop Dishwasher Under the Sink

8 Benefits of Installing a Countertop Dishwasher Under the Sink

1. Save Space in Your Kitchen: 

You know that every square inch counts if you have a small kitchen. You can free up valuable counter space by installing your dishwasher under the sink. It will also help you to keep your kitchen more organized and tidy. In addition, when the dishwasher is out of sight, it’s also out of mind, which can help you resist the temptation to let dirty dishes pile up.

2. Protect Your Dishes: 

If you have expensive dishware or fragile items that you’re worried about breaking into a traditional dishwasher, consider installing a countertop under your sink. The items will be less likely to get damaged during the washing and drying cycles. If the dishwasher is installed properly, there will also be less chance of water leakage, which could damage your cabinets or flooring.

3. Get More Use Out of Your Dishwasher: 

If you only use your dishwasher a few times a week, installing a countertop model under the sink can be more economical. This way, you can run it when it’s full and save money on your water and electricity bills. The countertop under-the-sink dishwasher will also be less likely to develop mold and mildew since it will be used more frequently.

Countertop Model Under the  Sink Can Be More Economical

4. Increase the Value of Your Home: 

If you’re considering selling your home in the future, installing a countertop dishwasher under the sink can greatly increase its value. Not only will this home improvement add to the overall aesthetic of your kitchen, but it will also make your home more functional and efficient. Of course, any home buyer would be happy to see a dishwasher in the kitchen, so this is an upgrade worth considering.

5. Save Money on Installation Costs: 

Hiring a professional to install your countertop dishwasher will likely cost less than if you had a traditional model installed. This is because the installation process is much simpler and doesn’t require any special tools or expertise. You can also save a significant amount of money by doing the installation yourself.

6. Don’t Worry About Leaks: 

Another advantage of installing a countertop dishwasher under the sink is that you don’t have to worry about leaks. This is because the unit is not directly connected to your home’s water supply. Instead, it uses a hose that connects to the faucet.

This means that even if there is a leak, it will be contained within the dishwasher and will not cause any damage to your home. In addition, when the dishwasher is not in use, the hose can be disconnected and stored away so there is no risk of leaks.

7. Keep Your Kitchen Clean: 

Installing a countertop dishwasher under the sink can help keep your kitchen clean and tidy. This is because the dishwasher will be out of sight and out of mind. When it’s not in use, it can be stored away in a cupboard or pantry, which will help to keep your kitchen looking neat and organized. Plus, if you have a small kitchen, this can be a great way to save space.

Keep Your Kitchen Clean and Tidy

8. Enjoy Greater Convenience: 

With a countertop dishwasher installed under your sink, you’ll be able to enjoy greater convenience. This is because you won’t have to worry about lugging dirty dishes to the kitchen sink.

You’ll also be able to load and unload the dishwasher without bending down, which can be a real pain if you’re tall or have back problems. Setting up a countertop dishwasher under your sink is a great way to save time and make your life easier.

Step by Step Process: How to Install a Countertop Dishwasher Under the Sink

Step 1: Choose the Right Location. 

You’ll need to find a spot for your dishwasher close to the sink and easy access to an electrical outlet. The location should also be large enough to accommodate the dishwasher, so measure the unit before starting the installation. If you think the location might be too small, choosing another spot is better.

Step 2: Choose the Right Size Dishwasher.

One of the most important aspects of choosing a dishwasher is ensuring it will fit in the space you have available. Most countertop dishwashers are 18 inches wide, so you’ll need to ensure there’s at least that much space available. You should also measure the unit’s height and depth to ensure it will fit under your counter.

Choosing a Dishwasher Is  Ensuring It Will Fit

Step 3: Prepare the Area. 

Before you begin, clear away any dishes, food, and appliances from under the sink. Next, use a measuring tape to measure the width and depth of your sink cabinet. Once you have these measurements, determine the best location for your dishwasher by tracing an outline of it onto the cabinet door or wall. If you’re unsure where to place it, a good rule of thumb is to center it between the sink and the edge of the cabinet.

Step 4: Cut the Hole. 

Carefully use a jigsaw or Sawzall to cut out the traced outline. If you’re using a jigsaw, make sure to use a fine-toothed blade meant for cutting laminate. When the hole is cut, use sandpaper to smooth any rough edges. If you don’t have sandpaper, you can also use a file.

Step 5: Attach Dishwasher Bracket. 

Now it’s time to attach the metal bracket with your dishwasher. This is what will hold the dishwasher in place under the sink. First, place the bracket on the underside of the countertop and mark the screw holes with a pencil. Next, remove the bracket and drill pilot holes for the screws. Then, place the bracket back in position and use screws to secure it.

Step 6: Install the Drane Pipe.

The next step is to install the drain pipe. You’ll need to connect one end of the pipe to the dishwasher and the other end to the garbage disposal or sink drain. If your dishwasher doesn’t come with a drain pipe, you can buy one at a hardware store. First, remove the knockout plug from the dishwasher’s drain connection to connect the pipe to the dishwasher.

Then, insert the pipe into the connection and secure it with a hose clamp. Next, attach the other end of the pipe to the garbage disposal or sink drain. You’ll need to use a P-trap if you’re connecting it to the sink drain. Finally, turn on the water and test the connection by running the dishwasher.

Insert the Pipe Into the Connection

Step 7: Connect the Water Supply Line.

The next step is to connect the water supply line to the dishwasher. First, you’ll need to find the water shut-off valve under your sink and turn it on. Then, connect the dishwasher’s water supply line to the valve. If you don’t have a water shut-off valve under your sink, you’ll need to install one before you can connect the dishwasher. Make sure that the connection is tight and there are no leaks.

Step 8: Connect the Plumbing.

The dishwasher must be connected to a water source and a drainage system. The first step is to connect the water supply line to the dishwasher. Locate the cold water shut-off valve under your sink, and turn it on. Connect one end of the flexible braided steel supply line to the valve, then twist on a 3/8-inch female-to-female elbow.

Next, connect the other end of the supply line to the dishwasher’s inlet valve. The inlet valve is located on the side of the dishwasher and has a 3/8-inch male threaded fitting. Tighten the fitting with an adjustable wrench, careful not to overtighten and damage the valve. You’ll need to connect the dishwasher’s drain hose to the drainage system.

Step 9: Test the Dishwasher.

Now that everything is hooked up, it’s time to test your dishwasher. Start by filling the detergent dispenser with dishwashing detergent. Then, run the dishwasher through a cycle to make sure that everything is working correctly. If you notice any leaks, check all the connections and tighten them if necessary.

 It's Time to Test Your Dishwasher

Step 10: Cleaning Up.

Once you’ve confirmed that your dishwasher is working properly, you can put everything back in place and tidy up any messes. Be sure to dispose of any packaging materials and leftover installation supplies. Your dishwasher is now ready to use!

Note: Installing a dishwasher is a relatively easy task that most people can do. However, if you’re not confident in your ability to install a dishwasher, you can always hire a professional to do it for you.

You Can Check It Out to Program Ghost Control Keypad

Some Helpful Tips and Suggestions

1. Read all instructions that come with your dishwasher before installation.

2. Choose the right place for your dishwasher. It should be near a water source and an electrical outlet.

3. Make sure the area underneath your sink is clean and clear of any debris or objects that could get in the way of installation.

4. Before installing, it is recommended that you test out your dishwasher to ensure it is working properly.

5. Always use caution when working with electricity and water. If you are unsure about anything, consult a professional.

6. When the dishwasher is not in use, disconnect the water and power supply. This will help prevent any accidents or damage to your dishwasher.

With these tips in mind, installing your countertop dishwasher under the sink should be a relatively straightforward process. Just be sure to take your time, follow all instructions carefully, and use caution when working with electricity and water.


A countertop dishwasher is a great option if you have a small kitchen, limited storage space, or want to avoid having a dishwasher in your main living area. By following these simple steps on how to install a countertop dishwasher under the sink, you can easily install your own countertop dishwasher and be enjoying clean dishes in no time.

We hope this article has helped you understand the process of installing a countertop dishwasher under the sink. If you have any questions about the installation process or would like help selecting the perfect countertop dishwasher for your needs, our team of experts is here to help. Thanks for reading!

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Rick Kelly

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

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