How to Install a Utility Sink Next to Washer: Step-by-Step Guide

Installing a utility sink next to your washer creates a dedicated laundry zone that streamlines your household chores. This setup centralizes dirty laundry collection, washing, and rinsing or pre-treatment in one efficient area. By planning the layout carefully, you can reduce unnecessary steps and make the chore of managing laundry far less time-consuming.

New Utility Sink Install From Start to Finish
New Utility Sink Install From Start to Finish

Planning the Layout and Gathering Tools

Utility Sink makeover! Making a laundry sink look built it! Check back for part 2.
Utility Sink makeover! Making a laundry sink look built it! Check back for part 2.

Before you touch a wrench, measure the space beside your washer to ensure the sink will fit without obstructing doors or vents. You will need a utility sink with a flat base, a drain kit designed for laundry use, a faucet supply line, plumber’s tape, channel-lock pliers, a reciprocating saw, and a drill with bits. Confirm that your washer discharge hose can reach the new sink drain height, which usually requires the drain rim to be at least 3 inches above the top of the washer agitator or drain pump.

Assessing Water Supply and Drain Location

DIY, Laundry Sink Installation
DIY, Laundry Sink Installation

Check for existing water lines in the area; if none are available, you may need to run a new supply line from a nearby bathroom or kitchen fixture. For the drain, you can either tap into the main sewer line with a Y-fitting or create a stand-alone drain that feeds into a laundry tray if local codes permit. Keep in mind that a dedicated stand-alone system typically requires a trap and vent to prevent sewer gases from entering your home.

Preparing the Area and Cutting the Hole

10 Ways to Add a Stylish Utility Sink to Your Laundry Room
10 Ways to Add a Stylish Utility Sink to Your Laundry Room

Clear the space around the washer and turn off any nearby water supplies to make a clean, safe working environment. If you are installing a top-mount sink, mark the outline of the sink basin on the countertop or cabinet surface and cut carefully with a jigsaw or reciprocating saw. For undermount installations, trace the sink footprint from below, then cut from the top while supporting the material to prevent chipping at the edges.

Securing Mounting and Plumbing

Place the sink into the opening, level it, and secure it with clips or brackets if needed, following the manufacturer’s instructions. Attach the faucet to the designated holes and connect the water supply lines hand-tight initially, then finish snugly with pliers to avoid cracking the fixture. Route the drain pipe so that it slopes downward toward the main stack or stand-alone trap, using the necessary fittings to maintain proper flow.

a laundry room with a washer and dryer next to a wall mounted sign
a laundry room with a washer and dryer next to a wall mounted sign

Connecting Drain and Testing for Leaks

Join the washer’s discharge hose to the utility sink drain using a secure adapter or by securing the hose with a strap if the sink has a laundry-specific port. Once all connections are made, turn the water supply back on and check the faucet for steady flow without dripping. Run a short wash cycle while observing the drain system to confirm that water moves freely and no leaks appear at joints or under the sink.

Finalizing the Installation

a kitchen sink under a faucet next to a washer and dryer
a kitchen sink under a faucet next to a washer and dryer

After confirming there are no leaks, allow the system to stabilize and retighten any fittings that may have shifted slightly. Seal around the sink rim with appropriate caulk to prevent moisture from searing into cabinetry or counter edges, and ensure the area is wiped down before replacing any stored items. With the utility sink now positioned beside your washer, you have created a functional, dedicated laundry command center.

a laundry room with a washer and dryer next to a bicycle on the floor
a laundry room with a washer and dryer next to a bicycle on the floor
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a washer and dryer sitting next to each other
a washer and dryer sitting next to each other
a washer and dryer sitting next to each other in a room with white cabinets
a washer and dryer sitting next to each other in a room with white cabinets
a white sink sitting next to a washer and dryer
a white sink sitting next to a washer and dryer
Diy Utility Laundry sink install | slop Wash Utility Sink installation in basement
Diy Utility Laundry sink install | slop Wash Utility Sink installation in basement
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a white sink sitting next to a washer and dryer in a laundry room
a white sink sitting next to a washer and dryer in a laundry room
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a sink and washer in a small room with tile flooring on the walls
a sink and washer in a small room with tile flooring on the walls
a kitchen with a washer and dryer next to the sink in front of it
a kitchen with a washer and dryer next to the sink in front of it
a washer and dryer in a room with wood flooring on the walls
a washer and dryer in a room with wood flooring on the walls