Kraus Undermount Sink Installation: A Comprehensive Guide
When it comes to upgrading your kitchen with a new sink, undermount sinks from Kraus are a popular choice among homeowners and professionals alike. Not only do they offer a sleek, seamless look, but they also provide improved functionality and ease of maintenance. However, installing an undermount sink can be a bit more complicated than installing a drop-in or self-rimming sink. In this article, we'll walk you through the steps involved in installing a Kraus undermount sink, covering the necessary tools, preparation, and techniques to ensure a successful installation.
Tools and Materials Needed
Before starting the installation, make sure you have the following tools and materials:
- Kraus undermount sink
- Drill press or handheld drill
- Drill bits (1/4 inch and 1/2 inch)
- Impact driver or screwdriver
- Mounting clips (usually included with the sink)
- Mounting screws (usually included with the sink)
- Waterproof adhesive (e.g., silicone or epoxy)
- Measuring tape
- Level
- Notched trowel (for applying adhesive)
- Putty knife (for removing excess adhesive)
Step 1: Prepare the Countertop
Before installing the sink, you'll need to prepare the countertop to ensure a smooth and secure installation. This involves:

- Cleaning the countertop to remove any dirt, grime, or old adhesive
- Measuring the sink's mounting clips to determine the optimal placement
- Drilling pilot holes for the mounting screws, if necessary
Step 2: Apply Waterproof Adhesive
Using a notched trowel, apply a thin, even layer of waterproof adhesive to the back of the sink and the corresponding area on the countertop. Be sure to follow the manufacturer's instructions for the specific adhesive being used.
Step 3: Attach Mounting Clips
Using your impact driver or screwdriver, attach the mounting clips to the sink's mounting flanges, following the manufacturer's instructions. Make sure the clips are securely fastened to prevent any movement or shifting during installation.
Step 4: Lower the Sink into Place
With the mounting clips securely attached, carefully lower the sink into place over the countertop. Use a level to ensure the sink is properly aligned and secure. If necessary, use a rubber mallet to tap the sink gently into place.

Step 5: Secure the Sink with Mounting Screws
Using your impact driver or screwdriver, tighten the mounting screws in a star pattern to secure the sink to the countertop. Be sure not to overtighten, as this can damage the sink or countertop.
Step 6: Connect Water Supply Lines and Drain Assembly
With the sink securely attached, connect the water supply lines and drain assembly according to the manufacturer's instructions. Make sure all connections are tightened securely to prevent leaks or water damage.
Step 7: Test the Sink
Finally, turn on the water supply and check for any leaks or water damage. Run the faucet through its full range of motion to ensure smooth operation and proper alignment.
Tips and Considerations
Here are some additional tips and considerations to keep in mind when installing a Kraus undermount sink:
Make sure to choose the correct type of adhesive for your specific countertop material (e.g., granite, quartz, or laminate).
Use a level to ensure the sink is properly aligned and secure.
Don't overtighten the mounting screws, as this can damage the sink or countertop.
Test the sink thoroughly to ensure smooth operation and proper alignment.
Conclusion
With these steps and tips in mind, you're ready to tackle your Kraus undermount sink installation with confidence. Remember to take your time, follow the manufacturer's instructions, and be patient throughout the process. By doing so, you'll be rewarded with a beautiful, functional, and long-lasting undermount sink that enhances the look and feel of your kitchen.