How To Replace A Sink In Your Kitchen The Best Way

How to replace a sink in the kitchen

Cost: $200-$400+

Time: Over 2 Hrs

Skill Level: Advanced

Do you have a sink in your kitchen that’s seen better days? Tired of looking at its grimy, fading surface and dirty grout lines? Ready to make an upgrade but not sure where to start?

Replacing a sink can be a daunting task, but don’t worry—we’ve got you covered! In this blog post, we will walk you through replacing your old sink with a new one. By the end, you’ll know whether or not this is a DIY project for you. You can also learn how to replace just your kitchen faucet.


  • Bag
  • Gloves
  • Flashlight
  • Smaller Bucket
  • Hack Saw
  • Caulk Gun
  • Screwdriver
  • Putty Knife
  • Utility Knife
  • Socket Wrench
  • Adjustable Wrenches
  • Pipe Wrench
  • Safety Glasses
  • Measuring Tape


  • Drop-In or Undermount Sink
  • Silicone Caulk
  • Towels
  • Plumber’s Putty
  • Fittings
  • Transition Coupling (for any rusty pipes)
  • Drainpipes

How To Install A Kitchen Sink

New sink

1. Remove The Old Sink

1. Turn off the Water Supply: The first step is to turn off your water supply valves. This will help avoid any mess or flooding while you’re working on the sink. If you don’t have valves, shut off the water at the main line. 

2. Disconnect Drain Pipes and Faucet Lines: Disconnect any drain pipes and water lines connected to your current sink. Use an adjustable wrench to loosen any clamps holding these pipes in place. You may need to use plumber’s tape if a drain pipe is leaking when you remove it. 

3. Remove Old Sink from Countertop: Now that all of your plumbing is disconnected from your old sink, it’s time to remove it from your countertop. Use a putty knife to cut away any caulk or sealant around the edges of the sink bowl before trying to pull it out. Once everything is loose, lift up on one side of the sink until it starts coming out of its opening in the countertop. Pull it straight up until it’s fully removed and set aside for disposal or recycling.  

4. Clean Countertop Opening: Before installing your new sink, make sure that you clean away all residue from where the old one was sitting to make room for its replacement. Use a scraper or putty knife and then wipe it down with rubbing alcohol if necessary. 

5. Prepare New Sink for Installation: Now that your countertop opening has been cleared out, take some time to inspect your new sink for any damage or imperfections before beginning installation. Make sure there are no cracked pieces or loose components on either side of it to ensure a secure fit once it’s installed. 

2. Measure Your Countertop Opening

The first step in measuring your countertop opening size is to measure the length and width of the area where the sink will be located. To ensure accuracy, take the measurements from three locations and then average them together.

Take note of any obstructions that would prevent a standard-sized sink from being installed, such as cabinets or drain pipes. Make sure you also measure any angle of corner edges. They may require special cutouts depending on what type of sink you choose. Once you have all these measurements, write them down so you can refer to them when ordering your new sink style

Next, measure your existing sink’s depth (front-to-back) and height (top-to-bottom). If you are replacing an existing sink with one with different dimensions, make sure to factor this into your calculations. There should be at least a 1/2 inch between your countertop’s top edge and your sink’s bottom edge for clearance. Ideally, there should be more depending on how much space you want between them for cleaning purposes.

Finally, take note of any other features in the area, such as faucet holes or soap dispensers. Make sure to factor these into your calculations, too. Otherwise, it could lead to costly mistakes further down the line.

3. Attach The Sink Fixtures

Start by attaching one handle at a time using an adjustable wrench or screwdriver, depending on what type of fasteners come with your particular faucet handle. When finished attaching both handles, ensure they operate properly before setting up any other accessories, such as soap dispensers or sprayers.

Securely tighten all fasteners when completed so nothing moves during use. Apply silicone caulk around each fixture base, making sure not to leave any gaps between them and their respective surfaces for a watertight seal. Wipe away any excess caulk.

4. Install A Drain Strainer

Installing the drain system

Install the drain strainer in its spot in the opening in your countertop. First, wrap some plumber’s putty around the bottom of the new strainer and then place it into the opening of your sink drain or shower drain until tight. Use your screwdriver or wrench and pliers once again to tighten all screws into place. Make sure everything is tight so that there are no leaks.

5. Install The Mount For A Garbage Disposal

Unscrew the mounting ring from the top of your garbage disposal unit before putting it aside for now. Insert the mount into place by fastening it onto your sink flange from below and screwing it down until it’s secure. Make sure that all bolts are firmly tightened.

6. Apply A Bead Of Silicone Caulk

To secure your sink, put a small amount of silicone caulk along the edge of the countertop (drop-in) or around the lip of the sink (undermount). This will help keep it in place and prevent water from spilling underneath.

7. Drop Or Raise Your New Sink Into The Countertop

Dropping in a black sink

Once your caulk has had enough time to dry, carefully lower (drop-in) your new kitchen sink into place over the top of your countertop opening. Make sure that all sides are lined up evenly.

It’s time to lift and secure your new sink into place! Be sure to lift carefully; if possible, enlist help from a friend or family member for extra support when lifting heavy objects like a large kitchen sink.

Wipe away any extra caulk that comes out from the edge of where you are caulking. This will create a nicer finish.

8. Attach The Clips

Self-tapping mounting clips are used a lot in sinks. They help you secure the fixture without making holes in anything. However, you will need to drill holes for metal clips.

Before attaching the clips with a screwdriver, ensure they are evenly spaced. This will help to keep the kitchen sink steady if it is ever touched or knocked against. But don’t make the screws too tight because this could cause tiles and countertops nearby to crack from too much pressure.

9. Reconnect The Water Supply Lines

When you are securing the water supply lines, take care. Fasten them securely, but not too tight. You don’t want them to leak, but you also don’t want to make it difficult to repair or replace them in the future if needed.

10. Install A Garbage Disposal

Installing a garbage disposal

Read and follow the manufacturer’s directions when installing a garbage disposal.

Begin by attaching the new disposer flange to the drain opening of your sink using plumber’s putty around its base (if necessary). Tighten it with an adjustable wrench until snug but not overly tight—you don’t want to damage or crack anything!

Then attach the main body of your garbage disposer onto the flange using supplied screws or bolts as directed by manufacturer instructions (most units come with mounting hardware). When secure, connect any additional plumbing or electrical lines as needed per the manufacturer’s instructions

11. Attach A Dishwasher Line

Use a clamp or other fastening device to attach your dishwasher line to the drainpipe connection under your sink. Make sure that the link is secure before you continue.

Connect the other end of your dishwasher line to a top fitting on either side of your kitchen sink and lightly push it into place. You’ll know it is securely positioned as you feel or hear an audible click.

Once all the connections are secure, apply silicone sealant around each one. This will help to create an airtight seal and prevent water leaks in the future.

12. Reconnect The Drain Trap

Be careful when you are handling the sink drain trap. Ensure that all plugs, fittings, screws, and taps are secure so the drain trap is firmly in place. Pay attention to every detail before you finish this task. Even a small gap can decrease water pressure or slow down drainage.

13. Seal The Top Of The Sink Edge

To ensure no water leaks from your drop-in sink, put a thin line of silicone caulk around the edge of your sink. This will help to keep water from going into the space below the sink.

14. Turn The Water Supply On

Testing a kitchen faucet

To turn the water back on, find the knob and turn it. Be sure to have a bucket and towels nearby in case any water starts leaking out.

15. Look For Any Leaks

Look carefully for leaks and tighten or loosen things until the leak stops. If there are still problems, it might be time to ask someone who knows more about this for help.

Enjoy Your Kitchen Remodel With Frei Remodeling

That’s how you can replace a kitchen sink! But that’s only part of a kitchen remodel.

Frei Remodeling is the perfect design-and-build team for your dream kitchen remodel. From replacing the sink to full cabinet refacing or tear outs, we’re experts in transforming the look and feel of any kitchen.

If you’re looking for a trusted professional crew who will work hard at delivering a stunning result that surpasses industry standards, don’t hesitate any longer—fill out our contact form today!

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Joe Frei

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