Square Sink Upgrade: Replacing Round Sink - YOU Can Do It!

Upgrading your kitchen or bathroom can significantly enhance its aesthetic and functionality. The plumbing system, a crucial element in any renovation, directly impacts the ease with which you can modify fixtures. Kohler, a leading manufacturer of kitchen and bath products, offers diverse sink options, making it achievable to replace round sink with square sink. Understanding the proper tools, such as a basin wrench, is essential for a successful installation. This comprehensive guide empowers homeowners to confidently replace round sink with square sink, achieving a modern look and improved utility.

Image taken from the YouTube channel Unemployed Redneck Hillbilly Creations , from the video titled Replacing The Bathroom Sink With A Kohler Archer Sink And American Standard Chatfield Faucet .

Square Sink Upgrade: Replacing Round Sink – YOU Can Do It!

This guide provides a step-by-step explanation on how to replace your existing round sink with a stylish new square sink. We'll cover everything from preparation and necessary tools to the actual installation process. While plumbing projects can seem daunting, with careful planning and following these instructions, you can successfully "replace round sink with square sink" and enhance your kitchen or bathroom.

1. Preparation is Key

Before diving into the project, adequate preparation is crucial for a smooth and successful installation.

1.1. Assessing Compatibility

• Countertop Cutout: The most critical factor is the existing cutout in your countertop. A square sink will require a different opening than your round sink. Replacing a round sink with a square sink often involves modifying the countertop opening.
  • Smaller Round Sink: If your round sink is significantly smaller than the desired square sink, modification is almost guaranteed.
  • Similar Size: If the sizes are comparable, carefully measure both. The square sink might cover the existing round cutout, but precise measurements are essential.
• Undermount vs. Drop-In: Consider the sink type.
  • Undermount: These sinks are mounted under the countertop. Modifying the cutout for an undermount square sink from a round sink opening is generally more challenging.
  • Drop-In (Top Mount): These sinks have a lip that rests on top of the countertop. Replacing a round drop-in sink with a square drop-in sink might be easier, as the lip can potentially cover slight imperfections in the existing cutout.
• Plumbing Considerations: Check the existing plumbing connections. The new sink's drain location and faucet configuration must be compatible with your current plumbing.

1.2. Gathering Your Tools and Materials

Here’s a checklist of essential items you'll need:

• New Square Sink: Choose a sink that fits your aesthetic and functional needs. Consider its dimensions and material.
• Sink Template (if provided): This is invaluable for marking the new cutout.
• Measuring Tape: For accurate measurements.
• Pencil or Marker: For marking the countertop.
• Safety Glasses: Protect your eyes from debris.
• Gloves: To protect your hands.
• Painter's Tape: To protect the countertop surface during cutting.
• Jigsaw or Reciprocating Saw (with appropriate blades): For cutting the countertop. Choose a blade designed for your countertop material (e.g., wood, laminate, granite, quartz).
• Drill (with appropriate drill bits): For pilot holes and faucet installation (if needed).
• Silicone Caulk: For sealing the sink to the countertop.
• Putty Knife or Scraper: For removing old caulk.
• Adjustable Wrench: For tightening plumbing connections.
• Basin Wrench: For loosening hard-to-reach faucet connections.
• Bucket: To catch water during plumbing disconnection.
• Old Towels or Rags: To clean up spills.
• Optional: Angle Grinder with Diamond Blade (for stone countertops): While a jigsaw can work on stone, an angle grinder provides a cleaner and more controlled cut.
• Optional: Countertop Repair Kit (for minor chips or imperfections): Helpful for concealing any accidental damage during the cutting process.

1.3. Safety First

• Turn Off the Water Supply: Locate the shut-off valves under the sink and turn them off completely. If you cannot find individual shut-off valves, turn off the main water supply to your house.
• Disconnect the Power (if applicable): If you have a garbage disposal or other electrical appliance connected to the sink, disconnect the power at the breaker box.

2. Removing the Old Round Sink

2.1. Disconnecting the Plumbing

1. Place a bucket under the P-trap (the curved pipe under the sink) to catch any remaining water.
2. Carefully loosen the slip nuts connecting the P-trap to the drain tailpiece and the drainpipe.
3. Disconnect the water supply lines from the faucet. Use an adjustable wrench or basin wrench as needed.
4. Disconnect any other accessories, such as a dishwasher hose or garbage disposal.

2.2. Removing the Existing Sink

1. Use a putty knife or scraper to carefully break the seal of the old caulk around the perimeter of the round sink.
2. If it's an undermount sink, support it from underneath while you work.
3. Gently lift the round sink out of the countertop opening. You may need to use a bit of force if the caulk is stubborn.

2.3. Cleaning the Area

Thoroughly clean the countertop surface around the opening, removing any remaining caulk or debris.

3. Modifying the Countertop (If Necessary)

This is the most challenging part and requires precision. If you are uncomfortable with this step, consider hiring a professional.

3.1. Marking the New Cutout

1. Use the Sink Template: If your new sink came with a template, carefully position it on the countertop, ensuring it's centered and aligned correctly. Use painter's tape to secure the template in place.
2. No Template? Measure the inside lip of the square sink and transfer those dimensions to the countertop. Draw a precise outline using a pencil or marker. Consider adding a slight "reveal" (where the countertop slightly overhangs the sink) or "negative reveal" (where the sink slightly overhangs the countertop) based on your preference.
3. Double-Check Your Measurements: Ensure the cutout is accurately marked and that the square sink will fit properly.

3.2. Cutting the Countertop

1. Pilot Holes: Drill pilot holes at each corner of the marked cutout, inside the lines. These holes will allow you to easily start the jigsaw or reciprocating saw.
2. Protect the Surface: Apply painter's tape around the marked cutout to protect the countertop from scratches during cutting.
3. Cut Carefully: Start cutting along the marked lines, following the template (if using) or your drawn outline. Use a slow and steady pace, allowing the saw to do the work. Avoid forcing the saw, as this can damage the countertop.
4. Support the Countertop: If cutting a large section, provide support underneath the countertop to prevent it from cracking or chipping.
5. Smoothing the Edges: After cutting, use sandpaper or a file to smooth any rough edges.

3.3. Addressing Countertop Material Variations

4. Installing the New Square Sink

4.1. Preparing the Sink

1. Clean the Sink: Wipe down the sink with a clean cloth to remove any dust or debris.
2. Install the Faucet (if necessary): If you purchased a new faucet, install it according to the manufacturer's instructions before installing the sink in the countertop.

4.2. Applying Silicone Caulk

1. Apply a bead of silicone caulk around the perimeter of the countertop opening. For undermount sinks, apply the caulk to the underside of the sink rim where it will contact the countertop.

4.3. Setting the Sink

1. Carefully lower the square sink into the countertop opening.
2. Press down firmly to ensure a good seal between the sink and the countertop.
3. For undermount sinks, use mounting clips to secure the sink to the countertop. Tighten the clips according to the manufacturer's instructions.

4.4. Cleaning Up Excess Caulk

Use a damp cloth to wipe away any excess caulk around the edges of the sink.

5. Reconnecting the Plumbing

5.1. Reconnecting the Drain

1. Reinstall the P-trap and tighten the slip nuts.
2. Reinstall the drain tailpiece and connect it to the P-trap.

5.2. Reconnecting the Water Supply

1. Reconnect the water supply lines to the faucet.
2. Tighten the connections with an adjustable wrench.

5.3. Checking for Leaks

1. Turn on the water supply slowly and check for any leaks around the drain and water supply connections.
2. Tighten any connections that are leaking.

5.4. Reconnecting Accessories

1. Reconnect any accessories, such as a dishwasher hose or garbage disposal.
2. Reconnect the power to the garbage disposal (if applicable).

Video: Square Sink Upgrade: Replacing Round Sink - YOU Can Do It!

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So, you've officially tackled the project to replace round sink with square sink! Pat yourself on the back – you’ve not only upgraded your space but also gained some valuable DIY skills. Happy renovating!