Learn to install a new kitchen sink with our easy-to-follow video and guide. In just a few steps, you can breathe new life into your kitchen.
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Before you begin this project, read the manufacturer’s instructions and follow all local building codes. If you're not comfortable installing a kitchen sink or related components (faucets and garbage disposers), Lowe's can do it for you.
Select the appropriate type of replacement sink. Single- and double-bowl drop-in sinks can be installed into most countertop surfaces. Undermount sinks install beneath the counter and should only be used with solid-surface and natural or engineered stone countertops.
These instructions are for installing a drop-in sink.
Measure your existing sink. If your new sink has different dimensions and drain location(s) than the unit it will replace, you may need to modify the countertop opening and / or plumbing.
For best results, make a drawing of your old sink with all measurements including distances from the sink wall to the drain center to use as a shopping aid and reference. Or you can remove your old sink, take it to Lowe's, and ask a Lowe's associate to help you select a replacement unit.
Wear safety glasses when working under the sink or cutting pipe and other materials.
Decide if you will also replace the faucet or install additional components such as a sprayer, soap dispenser, on-demand hot water tap or filtered water tap.
Standard sinks have 1, 2, 3 or 4 holes on the rear lip for a faucet and additional components.
Installation of a new faucet and other components is easier if it is done when you are installing a new sink, since you can easily access the hardware with the sink out of the countertop.
Before you begin, snap a picture of your plumbing configuration. This serves as a handy reference if you're having trouble reassembling the plumbing later.
Turn off both the hot and cold water supply lines. The shutoff valves typically are in the cabinet below the sink or in the basement. If you cannot find them, turn off the main water line to the house.
Turn on the faucet to relieve water pressure in the lines.
Use adjustable wrenches to disconnect the water supply lines to the faucet. Have a small bucket ready to catch any water left in the supply lines and drainpipes as they are removed.
Leave the faucet attached to the sink. You can remove both the sink and the faucet as one unit.
If you have a garbage disposer, turn off the circuit, then unplug it. Use pliers to disconnect the drainpipe and P-trap from the sink drain. Keep a bucket or pan underneath the drain to catch excess water.
Then remove the dishwasher drain line.
Remove the disposer following the manufacturer's instructions.
Locate the metal clips under the counter around the sink's perimeter. Loosen them with a screwdriver, open-end wrench or socket wrench and swing them toward the sink bowl.
Cut the caulk around the sink with a utility knife.
Push the unit from underneath and lift the old sink away.
Use a putty knife to remove grime, caulk and old plumber's putty from the countertop. Likewise, clean any components you will re-install.
Set the new sink in the countertop hole to verify that it fits. If necessary, modify the countertop opening using a jigsaw, router or tile cutter.
If your new sink has larger dimensions than the current countertop opening, turn the sink upside-down where you want it on the countertop. Trace the outline and create a new cutout with a jigsaw.
Remove the sink from the countertop hole to attach the clips, turned inward toward the sink bowl.
Install the faucet and additional components.
Apply a small bead of plumber's putty around the drain strainer and install the strainer, pressing firmly against the putty.
Tilt the sink to its side to place and secure rubber gaskets and threaded flange to the underside of the sink drain. Repeat this for additional drains without disposers.
Remove excess putty with a soft towel.
If you have a garbage disposer, use a screwdriver to install the mounting bracket to the bottom of the sink following the manufacturer's instructions.
Apply a bead of silicone sealant to the edge of the basin.
Lower the sink into the countertop opening, aligning squarely.
From below the sink, rotate the metal attachment clips outward and tighten the nuts or screws.
Attach the supply lines to the water connections of the faucet and the supply pipes. Tighten the connections, taking care not to strip the threads or overtighten.
If you have a garbage disposer, install the unit following the manufacturer's instructions. Insert the discharge pipe and tighten the clamp.
Reinstall the dishwasher drain.
Connect the disposer discharge pipe to the sink drain pipe and reattach the P-trap.
If your old drainpipes don’t line up to your new sink, you can make some simple adjustments.
If a pipe is too long (such as the tailpiece from the drain on the main sink):
If a pipe is too short:
If you need to make a bend (such as to a wall outlet):
Apply a small bead of sealant to the perimeter of the sink.
Reconnect the power to the disposer. Turn the water on and check for leaks.