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Modern bathroom sink with a gold widespread faucet and matching handles installed on a white countertop.

How to Install a Bathroom Sink Faucet

A step-by-step guide for DIY faucet installation.

Person installing a matte black bathroom faucet onto a sink countertop.

Before You Begin: What You’ll Need

The first step to prepping your space is to gather the necessary tools for your bathroom sink faucet installation. Most often, you’ll need:

• Adjustable wrench or basin wrench
• Bucket and towels
• Plumber’s putty or silicone sealant
• New KOHLER® faucet
• Flexible supply lines (if not included)
• Cleaning cloth or sponge
• Teflon tape
• Safety glasses and gloves
• Flashlight or headlamp for visibility under sink (optional)
• Caulk and caulk gun (if sealing around base)

Consult the product manual that comes with your bathroom sink faucet to see if any other additional tools are required or search KOHLER service parts to find a specific part.

Step-by-Step: How to Replace a Bathroom Sink Faucet

Styles

KOHLER bathroom sink faucets come in a range of design styles to seamlessly integrate within your space, including:

Traditional chrome bathroom faucet with ornate handles and a classic design.

Traditional

Timeless style that complements a classic aesthetic

Contemporary chrome bathroom faucet with a tall, sleek silhouette on a white sink.

Contemporary

Sleek silhouettes for modern bathrooms

Transitional style matte black faucet with gold cross handles on a bathroom sink.

Transitional

Versatile designs that complement both traditional and contemporary spaces

Installation Types

Ensure you select a faucet that will fit your existing faucet holes by measuring the diameter of each hole with a caliper or tape measure. For multihole installations, measure the space between the centers of the left and right holes to determine the faucet center. KOHLER installation styles include:

Center set bathroom faucet with spout and handles on a single base plate.

Centerset

Includes spout and handles mounted on a singular base plate

Single-hole faucet with gold and black finish, combining spout and handle in one unit.

Single-Hole

Combines the spout and handles into one singular unit

Wall-mounted bathroom faucet with black cross handles over a vessel sink.

Wall-Mount

Installs directly onto the wall so spout and handles hover over the sink

Widespread chrome faucet with separate spout and handles on a marble countertop.

Widespread

Spout and handles are installed separately from each other