How to Replace a Faucet Yourself

Replacing a faucet is one of the most approachable plumbing upgrades a homeowner can tackle — and one of the most immediately visible improvements in any bathroom or kitchen. The old faucet comes off, the new one goes on, and the room looks noticeably different in about an hour. The project requires no specialized plumbing knowledge, no soldering, no pipe cutting. It is a mechanical swap — disconnect, remove, install, reconnect — and the satisfaction of completing it successfully is the kind of confidence that carries into every project afterward.

Before You Buy: Measure the Hole Configuration

Bathroom faucets come in three standard configurations, and the new faucet must match the existing hole pattern in your sink or countertop. Single-hole: one hole, one handle or one combined spout-and-handle unit. Centerset: three holes, spaced four inches apart center to center, with the faucet body bridging all three. Widespread: three holes, spaced eight inches or more apart, with separate spout and handle units connected by hoses underneath. Measure before you shop. A deck plate can cover unused holes when installing a single-hole faucet in a three-hole sink, but the reverse — installing a widespread faucet in a centerset sink — requires drilling additional holes or choosing a different faucet.

While you are under the sink measuring, check the supply line connections. Replace old supply lines with new braided stainless steel supply lines at the same time as the faucet. They cost a few dollars each, install in seconds, and eliminate the most common source of under-sink water damage — the slow drip from an aging supply line connection that goes unnoticed behind the vanity.

The Removal

Shut off both hot and cold supply valves under the sink. Open the faucet to relieve pressure in the lines. Place a small bucket or towel under the connections to catch residual water. Disconnect the supply lines from the faucet tailpieces using a basin wrench or adjustable wrench. Remove the mounting nuts holding the faucet to the sink — this is where a basin wrench earns its place in your toolbox, as the mounting nuts are typically in a tight, awkward space behind the sink basin that standard wrenches cannot reach. Pull the old faucet up and off the sink. Clean the sink surface where it sat — calcium deposits and old putty need to be scraped off for the new faucet to seat properly.

The Installation

Follow the new faucet’s manufacturer instructions — connection methods and mounting hardware vary by brand. Most single-hole and centerset faucets mount from above through the sink holes and secure from below with a large mounting nut or bracket. Apply plumber’s putty (or the provided rubber gasket) to the base of the faucet before setting it into the sink — this creates a watertight seal between the faucet body and the sink surface. Tighten the mounting hardware from below, connect the supply lines, and turn on the water slowly while checking every connection for leaks.

Check every connection twice. Run both hot and cold water for several minutes while watching the connections under the sink with a flashlight. Place a dry paper towel under each connection — a single drop of water that might not be visible on a dark pipe or fitting will show immediately on dry white paper. A slow drip from a connection that looks dry can cause thousands of dollars in water damage over months if not caught at installation.

A faucet replacement builds genuine competence. The tools are simple, the process is logical, and the result is a visible improvement you interact with every day. Once you have done it, you will never consider calling a plumber for this again.

Is there a faucet in your home you have been wanting to upgrade — and what has been holding you back?