How to Install a Kitchen Sink

Installing a new kitchen sink is one of the most satisfying upgrades you can make. A fresh sink improves both function and appearance and can make your entire kitchen feel brand new. But before diving in, it’s important to know what’s involved in a kitchen sink installation.

To install a kitchen sink, you’ll need to have moderate DIY skills, some essential tools, and a bit of patience. Below, we’ll walk you through how to install a kitchen sink step-by-step. We’ll also share when it makes sense to call in a professional.

What to Know Before Installing a New Kitchen Sink

Before you start installing a new kitchen sink, make sure to gather your tools and do some planning:

• Measure your current sink opening to ensure your new sink will fit.
• Choose the right sink material and depth for your needs.
• Turn off the water supply and disconnect garbage disposals and/or dishwashers.
• Remove the drain trap, water supply tubes, and any other fixtures or clips that will be in the way.
• Inspect your countertop and plumbing to confirm they’re in good shape.
• Have a bucket and towels on hand to catch any residual water.
• Review any installation instructions that came with your new sink.

For more helpful prep tips, check out our guide on kitchen tips and maintenance.

How to Install a Kitchen Sink: Step-by-Step

It’s time. Here’s how to replace and install a kitchen sink to instantly transform your space.

Remove the Old Sink and Clean the Area

1. Turn off the water supply lines and disconnect the water supply hoses from the old faucet.
2. Loosen the sink’s mounting clips underneath the countertop.
3. Cut away old caulk or sealant around the rim of the sink.
4. Lift out the old sink and remove any remaining debris or putty from the counter surface.

Test-Fit the New Sink

1. Lower your new sink into the cutout to check the fit.
2. Confirm that the sink sits level and the water supply and drainage plumbing align.
3. Make any adjustments to the countertop opening, if necessary.
4. After making sure everything fits, remove the sink so you can further prep the base.

Apply Plumber’s Putty and Mount Sink

1. Roll the plumber’s putty into thin ropes and apply it around the edge of the sink or under the drain flange.
2. Carefully lower the sink into place and press down gently to seal.
3. Wipe away excess putty from the edges.

Secure Sink Clips/Brackets

1. From underneath the sink, use the provided mounting hardware to fasten the clips or brackets to the countertop.
2. Tighten them evenly, moving in a cross pattern to ensure a snug fit.

Reconnect Faucet and Plumbing

1. Reinstall the faucet (or install a new one) by following the manufacturer's instructions. 
2. Reconnect the hot and cold water lines.
3. Attach the sink drain and garbage disposal (if applicable).
4. Turn the water supply back on and test for leaks.

As you can see, the process of how to install a new kitchen sink can be a little complex. If you’re not certain you can tackle it on your own, it’s definitely worth it to hire a professional plumber.

How Much Does Kitchen Sink Installation Cost?

Kitchen sink installation costs can vary based on materials, labor, and the scope of work. For example, larger sinks or sinks made of luxurious materials will cost more than standard-sized sinks made of traditional materials. The cost will also go up if you’re making any plumbing modifications, like adding a garbage disposal, relocating plumbing lines, or adjusting the size of the sink.

The bottom line: If you’re doing things yourself, it will be cheaper than hiring a plumber. That said, sometimes, the peace of mind a professional installation provides is priceless.

FAQs About Kitchen Sink Installation

Can I install a new kitchen sink myself?

Yes, you can install a kitchen sink if you’re comfortable using tools, following instructions, and working in tight spaces. It’s a solid DIY project for intermediate skill levels.

What holds a kitchen sink in place?

Mounting clips, brackets, and plumber’s putty or silicone caulk secure the sink and create a watertight seal.

Do you need plumber’s putty to install a kitchen sink?

Yes, professionals often use plumber’s putty for sealing drain flanges or fixtures. Some sink materials may call for silicone caulk instead, so always check manufacturer guidelines.

Sink It Right the First Time: Call Roto-Rooter

Installing a new sink can breathe fresh life into your kitchen—but only if it’s done right. If you’re facing stubborn plumbing, awkward layouts, or just want the peace of mind of a professional touch, Roto-Rooter has your back. Our licensed plumbers can handle sink installations of all kinds quickly, cleanly, and to code. Schedule your appointment with a trusted plumber in your area now.