Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly


Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly

Double sinks can be a game changer for any kitchen, providing ample space for multiple people to work and clean at the same time. However, it is important to ensure that the double sinks are correctly piped to avoid any potential plumbing issues down the line. Here are some steps to follow:

  1. Shut off the water supply: Before you begin any plumbing work, you will need to shut off the water supply to your kitchen sink. This can typically be done by turning off the shut-off valve located under the sink.
  2. Remove old sink: If you are replacing an old sink with a new double sink, you will need to remove the old sink and its piping first.
  3. Measure and mark: Measure the area where you plan to install the new double sink and mark the spot where the waste pipes and water supply lines will need to be connected.
  4. Install trap and fittings: Install a trap and fittings onto the waste pipe to ensure proper drainage and prevent any leakage.
  5. Connect the water supply lines: Connect the hot and cold water supply lines to the sink’s faucet. Make sure to use the appropriate couplings and fittings for a secure connection.
  6. Test for leaks: Once everything is securely connected, turn the water supply back on and test for any leaks. Make sure to also check the drain for proper drainage.

By following these steps, you can transform your kitchen with a functional and stylish double sink, while also ensuring that it is correctly piped for smooth and efficient operation for years to come.

Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly


Are you looking to upgrade your kitchen sink? A double sink may be the perfect addition to your kitchen! Not only does it offer extra space for washing dishes and preparing food, but it can also add an elegant touch to your kitchen. However, before you jump into installing a double sink, it’s important to know the steps for piping it correctly. In this post, we’ll guide you through the process.

Step 1: Choose the Right Location for Your Double Sink

The first step in piping your double sink correctly is choosing the right location for it. You need to ensure that the new sink will fit in your existing countertop and that there is enough space for it to be installed. You also need to be mindful of the plumbing connections. If you’re not sure about the location, consult with a plumber or a kitchen designer.

Step 2: Remove the Old Sink and Plumbing

Once you’ve chosen the location for your new sink, it’s time to remove the old sink and plumbing. Turn off the water supply and disconnect the plumbing connections. Carefully remove the old sink and any excess caulking or adhesive.

Step 3: Install the New Double Sink

If your new double sink came with a template, use it to trace the outline of the sink onto the countertop. Cut out the hole for the new sink using a jigsaw or a circular saw. Apply caulking around the rim of the sink and carefully place it in the hole. Secure the sink in place with clips or mounting hardware provided with the sink.

Step 4: Connect the Drainage Pipes

Connecting the drainage pipes can be a bit tricky, but it’s crucial to ensure proper drainage of your sink. Start by connecting the tailpiece and the drain assembly to the sink. Then, connect the PVC pipes to the waste outlet on the drain assembly. Install a P-trap to prevent sewer gas and make sure that all connections are tight and secure.

Step 5: Connect the Water Supply

Once the drainage pipes are connected, it’s time to connect the water supply. Install shut-off valves under the sink and connect the water lines to the faucet. Turn on the water supply and check for leaks. Make sure that all connections are tight and secure.

Step 6: Test Your Double Sink

After completing the installation, turn on the water and test your double sink. Check for any leaks or drips and ensure that the water is draining properly. If you notice any issues, consult with a plumber to diagnose the problem.


Transforming your kitchen with a double sink can add both functionality and aesthetic appeal to your space. By following these steps for piping your double sink correctly, you can ensure a smooth installation process and avoid potential problems down the line.

For more information on kitchen sink installation and plumbing, check out this helpful resource.

sink in kitchen

Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly

What is double sink piping?

Double sink piping refers to the process of connecting two sink basins to the same drain pipe. This allows for two separate sinks to drain into the same pipe and prevent clogging.

What supplies are needed for double sink piping?

Supplies needed for double sink piping include two sink basins, PVC pipes, pipe connectors, a drain kit, plumber’s putty, and a connecting nut.

What are the steps to properly pipe double sinks?

1. Install the two sink basins in the desired location with a hole cutout for the drain.
2. Connect the two sink basins with a T-shaped pipe connector.
3. Attach the PVC pipes to the T-shaped connector and run them under the sink to the drain pipe.
4. Use plumber’s putty to seal the drain kit into the sink basin.
5. Attach the drain kit to the PVC pipes and secure with a connecting nut.
6. Test the sinks for proper drainage by running water and checking for leaks.

Do I need a professional plumber to pipe double sinks?

It is recommended to hire a professional plumber for complicated plumbing projects to ensure proper installation and avoid potential issues. However, if you have basic plumbing knowledge and experience, you may be able to do it yourself. Always refer to manufacturer instructions and local plumbing regulations before beginning any project.

kitchen sink

How to Pipe a Double Kitchen Sink

How to Pipe a Double Kitchen Sink


If you are renovating your kitchen or just replacing your old sink, you might need to know how to pipe a double kitchen sink. A double sink is practical, versatile, and convenient, but it requires two drain lines, two P-traps, and a tee fitting to connect it to the main drain stack. Here is a step-by-step guide to help you install your double kitchen sink with confidence and ease.

Step One: Turn off the Water Supply

Before you start any plumbing work, you need to turn off the water supply to your kitchen. Locate the shut-off valves under the sink or in the basement, and turn them clockwise to shut off the water.

Step Two: Disconnect the Old Sink

If you are replacing your old sink with a new one, you need to disconnect the old sink first. Disconnect the drain and the water supply lines, and remove the mounting clips or brackets that hold the sink in place. Lift the sink out of the countertop and set it aside.

Step Three: Install the Tee Fitting

The tee fitting is the key component that connects the two drain lines from the double sink to the main drain stack. Install the tee fitting on the main drain pipe, preferably below the sink level. Make sure the branches of the tee face upward and outward, so you can connect the P-traps later.

Step Four: Install the Drain Lines

The two drain lines from the double sink should be of equal length and have a slight downward slope toward the tee fitting. Install the drain lines on the sink and the tee fitting with slip nuts and washers, but do not tighten them yet. Adjust the height and angle of the sink if needed, and make sure the drain lines do not kink or twist.

Step Five: Install the P-Traps

The P-trap is a U-shaped pipe that traps water and prevents sewer gases from entering your kitchen. Install the P-traps on the drain lines with slip nuts and washers, and adjust the height and angle of the P-traps to fit the space and align with the drain lines. Tighten all the connections with pliers or a wrench.

Step Six: Connect the Water Supply Lines

Connect the hot and cold water supply lines to the faucet and the shut-off valves using flexible supply tubes. Tighten the connections with a wrench or pliers, but do not overtighten them. Open the shut-off valves slowly to restore the water supply to your kitchen.


Piping a double kitchen sink is not as complicated as it might seem. With the right tools, materials, and instructions, you can do it yourself and save money on professional installation. However, if you are not sure about your plumbing skills or encounter any difficulties, it is best to seek help from a licensed plumber.

For further information about kitchen sinks and plumbing, you can visit the Kitchen Sink page on Wikipedia.


Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly

Transform Your Kitchen with Double Sinks: Steps for Piping Them Correctly

Choosing the Right Double Sink

  • Measure the space where you want to install the sink
  • Consider the material, style, and color
  • Budget for additional components like garbage disposals and soap dispensers

Prepare the Work Area

  • Turn off the main water supply
  • Remove the old sink and any remaining plumbing fixtures
  • Make necessary adjustments to the cabinet, countertop, and wall

Install the Pipes and Faucets

  • Place the sink into the hole and secure it with clips
  • Connect the drainpipes and garbage disposal
  • Install the water supply lines and faucet

Test the Sink and Fix Any Issues

  • Turn on the water supply and check for leaks
  • Make any necessary adjustments or repairs
  • Clean up the work area and enjoy your new double sink!

Category – Kitchen sink

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Hi, I'm Jennifer! I love creating original and delicious recipes and sharing them here. I cook and photograph food with my husband Jeff in Boston.


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