How to Replace an Undermount Kitchen Sink?

di Sinkple Mr. su May 16, 2024

Installing an undermount kitchen sink might just be the upgrade you need. At Sinkple, we're not just about selling workstation kitchen sinks; we're on a mission to redefine the culinary experience. Our journey began with a powerful idea – creating kitchen workstations that seamlessly blend functionality, design, and innovation. Today, we bring you a step-by-step guide on how to replace a new kitchen sink" using creativity, burstiness, and a touch of Sinkple magic!


Things to Consider Before Replace an Undermount Kitchen Sink

Before diving into the installation process, there are a few key factors to keep in mind. Firstly, ensure that your countertop can support the weight of an undermount kitchen sink. These sinks, with their sturdy build, are best suited for durable countertop materials like granite, quartz, marble, or concrete. Also, don't forget to measure your existing sink cutout to ensure a proper fit for the new sink.


Removing the Old Sink: A Step-by-Step Guide

Before you can usher in the new, you'll need to bid adieu to the old. Follow these steps to remove your existing undermount sink:

  1. Document the Drain Setup: Grab your smartphone and snap a few pictures of the drain setup beneath your sink. Trust us; you'll thank yourself later for this foresight.
  2. Disconnect Plumbing Connections:Start by turning off the water supply to the sink. Then, disconnect the plumbing connections, including the P-trap, from the drain.
  3. Release the Sink Clips: Most undermount sinks are secured to the countertop with clips. Locate and loosen these clips to free the sink from the countertop.
  4. Carefully Remove the Sink: With the clips undone, gently lift the sink out of its place. Be cautious not to damage the surrounding countertop during this process.
  5. Clean the Countertop: Once the sink is out, give the underside of the countertop a thorough cleaning to prepare for the new sink installation.


What Do I Need to Install a Undermount Kitchen Sink?

To embark on this culinary adventure, gather your tools and materials. You'll need:

  • Screwdriver
  • Adjustable wrench
  • Silicone Sealant


How to Install a Undermount Kitchen Sink

Step1: Measure your sink

Before you start, measure your current sink. If the new one is a different size or shape, you might need to adjust your countertop or plumbing.

Step 2: Turn off the water

Find the shutoff valves under the sink or in the basement. If you can't find them, turn off the main water line.

Step 3: Position the sink

Center the new sink on the countertop, trace its outline, and mark spots for the faucet and drain pipe.

Positioning the Sink

Step 4: Attach the sink

Drill and cut the countertop according to your measurements. Seal exposed wood if needed. Apply silicone sealant around the hole, then lower the sink into place. Wipe away excess sealant.

Positioning the Sink

Step 5: Install the faucet

Secure the faucet and connect the gravity hammer to the water pipe.

Mounting Waterfall Faucet and Gravity Hammer

Step 6: Connect the water lines

Attach the supply lines to the faucet and supply pipes, tightening them carefully.

Attach the Water Lines

Step 7: Check for leaks

Turn on the water and inspect all connections for leaks before celebrating your successful installation.

Further reading: How to Install a Kitchen Sink: Step-by-Step



1. Can I install an undermount sink on any type of countertop?

Yes, you can, but it's best suited for solid, weight-bearing surfaces like granite, quartz, marble, or concrete.

2. How do I know if my countertop can support the weight of an undermount sink?

Generally, if your countertop is made of a sturdy material like granite or quartz, it should be able to support the weight of an undermount sink.

3. Do undermount sinks require special care or maintenance?

While undermount sinks are relatively low-maintenance, it's essential to clean them regularly to prevent buildup and maintain their appearance.

4. Can I install an undermount sink myself, or should I hire a professional?

With the right tools and a bit of DIY know-how, installing an undermount sink can be a manageable project for many homeowners. However, if you're unsure or uncomfortable with the process, it's always wise to seek professional assistance.

5. How long does it typically take to install an undermount sink?

The time required for installation can vary depending on factors like your level of experience and the complexity of the project. Generally, though, you can expect the process to take a few hours from start to finish.



There you have it—your comprehensive guide to installing an undermount sink like a pro. By following these step-by-step instructions and considering the essential factors outlined above, you can upgrade your kitchen or bath with ease. Say goodbye to that outdated sink and hello to a fresh, modern look that's sure to impress.