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How to Install an Undermount Sink

Use a carriage bolt and clip system to install an undermount sink and hook up the faucet.

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install an undermount sink Watch Video
  • Time

    2 hours

  • Price Range

    $100 - $250

  • Difficulty

    Easy to Moderate


Step 1: Prep and Install the Sink

Use six carriage bolts (Image 1) to hold the sink in place. Run a bead of 100-percent silicone around the flange of the sink (Image 2) — make sure the sink and counter are clean to get full contact with the silicone. Set the sink in place and screw in the bolts.

Step 2: Install the Faucet

To install the faucet, thread the supply lines through the holes (for the faucet, sprayer and soap dispenser) in the countertop. Tighten the connections under the sink and you're ready for running water.




  • Riviera single-handle kitchen faucet with vegetable sprayer (Brizo/model: 6115088/color: Chrome) from Delta Faucet Co.