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Q.

How to Install Undermount Kitchen Sink to Granite?

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0 2025-11-20T09:56:28+00:00

To set up an undermount kitchen sink on granite countertop, you must always start by cleaning and drying the countertop and sink. Here are the detailed instructions on how to install undermount sink to granite:

  1. Take a measurement of your granite countertop's sink opening. This will usually measure 33 by 22 inches outside the hoops. 

  2. Now, when you go to your home improvement store or plumbing shop to select your new sink, go with these measurements. 

  3. Select a reveal style for your washbasin. The amount of the washbasin edge that is visible after installation will depend on this.

  4. Now, place your washbasin in the middle of the countertop opening with caution.

  5. For a subtle look, align the sink's edge with the counter's edges. 

  6. Install the built-in sink.

  7. Mark the positions where holes in the counter need to be drilled.

  8. Take out the sink. Drill holes in the designated spots using a drilling machine. 

  9. Now, use denatured alcohol to clean the ridge, and allow it to dry. 

  10. Next, lightly coat the sink's edge with sealant.

  11. Install the washbasin underneath. 

  12. Place it beneath the granite by snapping it into place.

  13. When working on your granite countertop, especially if the stone is dark in colour, ensure you use clear sealer.

  14. Place the wing nuts into the available bolt heads. Ensure the nuts are tight. 

  15. Give things a few days to settle down. 

  16. As directed by the manufacturer, connect the basin sink to the plumbing beneath the cabinet vanity. 

  17. Now, to ensure a tight seal, caulk all threaded connections.

  18. You can now use your hands to apply pressure on the sink's edges from above to release trapped air. 

  19. Finally, use a fresh cloth to wipe any visible caulking around the sink's edges.

This is all about how to attach undermount sink to granite countertop. 

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