How to Install an Undermount Kitchen Sink – Easy to Follow Steps

Searching for an easy-to-follow installation guide for your newly bought undermount sink? You have come to the right place.

Undermount sinks are mounted to the bottom of the countertop. This ultimately leads to the availability of more space on your work surface. These sinks provide a seamless finish to the entire kitchen look. The absence of any obstruction between the undermount sink and the countertop makes cleaning easy. You can easily swipe the food particles and dirt from your countertop into the sink without any mess. Undermount sinks work best with sturdy countertops such as stone, quartz or solid surface due to their heavy weight.

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Unlike drop-in sinks, these sinks do not have a rim; therefore, the installation of these sinks is different from the drop in versions. However, we have simplified the installation procedure for you. Please take a look at our installation guide for undermount kitchen sinks so that you can install your new undermount sink yourself.

To begin with the installation, make sure your countertop is modified enough for the new sink to fit in.

DIY Installation Procedure For Undermount Sink

An undermount sink can be installed using the following steps:

Tools and Material Required for Installing an undermount a kitchen sink:

Step 1: Take a picture of the plumbing assembly so that it may help you later (For reconnecting and reattaching all pipes). Now, turn off the water supply and disconnect all the plumbing pipes before removing the sink. Make sure to keep a bucket under the fixtures to collect any dripping water.
Turn off the garbage disposal and remove it.

Step 2: Remove the existing undermount sink by unscrewing the metal clips and cutting through the silicone, that attaches the sink to the countertop. You can use a utility knife for this purpose.

Step 3: Prepare the countertop surface from both sides by removing any silicone residues left behind, with the help of a razor scraper. Be careful to avoid damaging the countertop surface.

Step 4: Now, clean the upper and lower side of the countertop, as well as the rim of the new sink, using mineral spirit or denatured alcohol.

Step 5: Apply a bead of silicone sealant to the edge of the new sink, while placing the sink in the cabinet below the countertop cutout. Make sure to ask someone to guide you while placing the sink in the proper place from below.

Step 6: Place a 2 by 4 block on top of the sink. Place towels below each end of the block (on the countertop) to avoid scratching the countertop. Now, pass one end of the bar clamp through the drain hole of your sink.

Step 7: Place a 2 by 4 block on the underside of the sink to avoid damaging the sink from lower side. The block should be placed between the clamp and the sink. Hold the sink in place by tightening the clamp.

Step 8: Finally attach the mounting brackets.

Step 9: Clean any excess silicone left on the sink, using a damp cloth

Step 10: Remove the bar clamps 24 hours after installation of your undermount sink, so that the silicone sealant gets enough time to dry and seal the sink.

Step 11: Install the drain and re-attach the disconnected plumbing fixtures.

Your new undermount sink is ready to use! Enjoy the sleek finish of your new sink!