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  • Undermount Kitchen Sinks – Installation Guide

    Works best with new countertop.

    Works Best With These Products:

    Eden
    SK472
    SK474
    SP400

    Orwell
    SK201
    SK202
    SK205
    SP502
    SP701

    Pollock
    P1U

    Rivera
    SK203
    SK204
    SK704

    Effortless Installation with BILT®
    Undermount sink installation instructions are available on the BILT® App. Download the BILT App and search “Sinkology” to find interactive instructions specifically for your product and installation type. It’s so simple, it feels like cheating!

    Getting Started

    This procedure will assist you with installing the Sinkology Kitchen or Bar Undermount Sink.

    • Pro Installation
    • Undermount

    When remodeling, most people will replace the countertop at the same time as the sink. If you wish to keep your existing countertop you must ensure that your new Sink is at least as large as your existing sink, and if it is not, you must either replace your countertop or exchange the new Sink for one that is at least as large as your existing sink.

    What You’ll Need

    Carpenters Square, a Level, a Tape Measure, Painters Tape, a Rubber Mallet, Scissors, a Utility Knife, a Jigsaw fitted with a Carbide or Diamond Blade, a Power Drill, a 3 1/2″ Hole Saw, a Phillips Screw-driver, 100% Neutral-Cure Silicone Sealant, Plumbers Putty, a Carpenters Pencil, a Water-Soluble Marker, Craft Paper (larger than the Sink), and Safety Glasses and Gloves.

    Depending on your type of countertop, you may also need either a Pull-Saw, a Router with a 45-degree Bevel Bit, a Rotary Tool with a Grinding Bit, or an Oscillating Tool.

    Instructions

    1. Turn off the water supply and disconnect the plumbing.
    2. Remove any existing fixtures and countertop if necessary.
    3. Place the new Sink upside down onto the Paper, and tape the edge of the Sink to it.
    4. Turn over the Sink and Paper, and rub the Pencil across and along the upper edges of the Sink. When you are satisfied that they have been accurately traced, remove the Paper. Note: A Template which has been cut along the inner line will create a hole flush with the edge of the Sinks basin. If you wish to offset the lip of the countertop from the Sink, you will need to draw another cut line on your Template accordingly.
    5. Cut out the center of the Template along the inner line (or cut line, if desired). Note: Trim the Template slowly, often checking that it is matching the shape of the Sink. If you have trouble with the first Template, do not hesitate to make another.
    6. Since your new Sink was built by hand, its shape may have minor variations. To ensure the best fit and finish, the opening in the countertop must be cut to match with great accuracy. Please read and follow these directions before cutting the countertop. Note: Painters Tape is required to prevent chipping on wood-based countertops and is optional on other materials. If you plan to use a Wet Saw to cut your countertop, you should omit the Tape and mark the countertop directly with a suitable Marker.
    7. Find and mark the centerline of where the Sink will be installed. Note: The center will often be where the cabinet doors meet, but your cabinetry may vary.
    8. Measure the width of the Sink side to side. On the countertop, measure and mark exactly half that distance on both sides from the center.
    9. Using a Square and a Pencil, draw lines through all three marks, perpendicular to the front of the countertop.
    10. Apply Painter’s Tape to the countertop just inside the outer lines.
    11. Mock up any plumbing connections and faucet placement to ensure necessary clearances.
    12. Measure the exact distance the rear of the Sink should sit from the back edge of the countertop, mark it on all three lines, and apply a line of Painters Tape to the countertop just in front of the three marks.
    13. Measure the length of the Sink front to back. On the countertop, measure and mark that distance forward from the rear line.
    14. Apply Painters Tape to the countertop just behind the front line.
    15. Center your Template to the lines on the countertop. If any countertop shows below the edge of the template, apply additional Tape to the countertop to cover them, then recenter the Template.
    16. Trace the edge of the Template onto the countertop, then remove the Template. Note: As you are cutting the countertop, remember to remove less material at first, then make adjustments to trim to its finished shape. Ruining a countertop by cutting too far is impossible to fix and expensive to replace.
    17. Use a 3 and one-half inch Hole Saw to cut a starting hole inside each corner of the traced cut line.
    18. Cut the installation hole in the countertop along the traced cut line, then remove the Tape. Note: Depending on your type of counter-top, you may wish to finish the cut edge by sanding, beveling, and/or polishing.
    19. Temporarily position the Sink to double-check that it fits properly. If necessary, make adjustments to the hole.
    20. Apply 100% Neutral-Cure Silicone Sealant around the edge of the Sink.
    21. Mount the Sink under the countertop using mounting hardware which has been approved for your countertop type.
    22. Create a smooth seal around the Sinks upper rim using 100% Neutral-Cure Silicone Sealant. Note: Allow the Sealant time to cure properly before using the Sink.
    23. Install the faucet and drain fitting.
    24. Reconnect the plumbing, turn on the water supply, check for leaks, and repair if needed.

    Congratulations, this completes the installation of the Sinkology Undermount Sink.

    Male standing in kitchen with hands on hips, blue button down shirt and friendly smile.

    Need Help?

    Installing your new Sinkology product should be a breeze with BILT®, but if you hit a snag, don’t sweat it—we’re here to help! Our team of friendly Sinkologists® is just a call, email, or DM away. Whether you need tips, tricks, or troubleshooting, we’ll get you back on track ASAP.

    Call us at 866.915.3003
    Email us at customerservice@sinkology.com
    Slide into our DMs on social—we’re ready when you are!

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