Replacing an undermount sink might seem daunting, but with the right tools, preparation, and a bit of patience, you can do it efficiently. Whether you're upgrading your kitchen or dealing with a damaged sink, this guide will walk you through the essential steps for a seamless replacement process.
Tools and Materials You'll Need
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A new undermount sink (shop premium undermount sinks here)
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Silicone adhesive or sealant
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Putty knife
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Adjustable wrench
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Screwdriver
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Cleaning cloth
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Isopropyl alcohol or adhesive remover
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Support brackets (if not included with your new sink)
Step-by-Step Guide
1. Turn Off the Water Supply
Begin by shutting off the water supply to your sink. Locate the valves under your sink and turn them clockwise until fully closed. For extra safety, you can also turn off the main water supply.
2. Disconnect the Plumbing
Using an adjustable wrench, disconnect the water lines, drainpipes, and any garbage disposal unit attached to the sink. Be sure to place a bucket underneath to catch any residual water.
3. Remove the Old Sink
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Loosen the Fasteners: Look underneath the countertop for clips or fasteners securing the sink. Use a screwdriver to loosen and remove them.
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Cut the Sealant: Run a putty knife between the sink rim and the countertop to break the sealant bond.
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Lift Out the Sink: Carefully push the sink upward from below the countertop. If it's stuck, apply gentle pressure with the putty knife.
4. Prepare the Countertop
After removing the old sink, scrape off any remaining sealant or adhesive using a putty knife. Clean the area thoroughly with isopropyl alcohol or adhesive remover to ensure a smooth and clean surface for the new sink.
5. Dry Fit the New Sink
Place the new undermount sink in position to ensure it fits properly. Check alignment with the countertop cutout and make any adjustments as needed. If your sink comes with a template, use it to verify fitment.
6. Apply Sealant
Run a bead of silicone adhesive or sealant around the underside edge of the sink. This will help create a watertight seal between the sink and the countertop.
7. Secure the Sink
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Attach the Fasteners: Reattach or install new fasteners to secure the sink to the countertop. Tighten them evenly to prevent shifting.
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Use Support Brackets: If provided, install support brackets for additional stability, especially for larger sinks like the Franke Mythos 1.5 Bowl Undermount Sink.
8. Reconnect the Plumbing
Reconnect the water lines, drainpipes, and any additional fixtures such as a garbage disposal. Tighten all connections to prevent leaks.
9. Test for Leaks
Turn on the water supply and check all connections for leaks. Tighten any loose fittings as needed. Allow the sealant to cure as per the manufacturer’s instructions before using the sink fully.
Additional Tips
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Choose the Right Sink: If you’re upgrading, consider high-quality models like the Franke Mythos Undermount Kitchen Sink MYX110-70 for durability and style.
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Use High-Quality Sealant: Opt for kitchen-grade silicone to ensure a long-lasting seal.
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Work with a Partner: Larger sinks can be heavy; having someone to assist you will make the process smoother.
When to Call a Professional
While replacing an undermount sink is manageable for most DIY enthusiasts, some scenarios may require professional help. Call an expert if:
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The countertop needs adjustments or modifications.
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You’re uncertain about disconnecting and reconnecting the plumbing.
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The sink is particularly large or complex to handle.
Replacing an undermount sink can transform the look and functionality of your kitchen. With this guide, you’re well-equipped to take on the task and achieve a professional-looking result. If you’re looking for a replacement sink, check out our range of premium undermount kitchen sinks at The Tap Specialist. From sleek stainless steel to versatile 1.5 bowl options, we have the perfect sink for your needs.
Happy renovating!
