DIY Faucet Replacement and Repair

A dripping faucet, a seized handle, a corroded valve seat — these are among the most common household plumbing complaints, and also among the most approachable repairs for a homeowner willing to spend an afternoon under a sink. This page covers the mechanics of faucet types, the step-by-step logic of replacement and repair, the scenarios where DIY is the clear call, and the narrower set of situations where it isn't.

Definition and scope

Faucet repair encompasses any work that restores or replaces the components controlling water flow at a fixture — a kitchen sink, bathroom vanity, bathtub, or utility sink. Faucet replacement means removing the entire fixture body and installing a new one. These are considered plumbing DIY basics precisely because they require no new pipe runs, no soldering in most cases, and no permits under the plumbing codes of most US jurisdictions (replacing a like-for-like fixture at an existing supply connection typically falls below permit thresholds, though it is worth confirming with local code — see DIY Permits and Codes for context).

The scope is deliberately bounded. Faucet work touches the supply stop valves under the sink, the supply lines connecting them to the faucet body, the faucet's internal cartridge or valve mechanism, and the drain assembly. It does not involve the main shutoff, the supply branch lines inside walls, or the drain stack — those cross into territory covered separately under home repair DIY.

How it works

Understanding what kind of faucet is in front of you changes everything about how to fix it. There are four main faucet types in residential use, each with a distinct internal mechanism:

1. Ball faucets — A single rotating ball with holes and slots controls both temperature and flow. Common in kitchens. When they drip, the culprit is usually worn springs, seats, or O-rings inside the ball assembly.
2. Cartridge faucets — A cartridge (a self-contained plastic or brass cylinder) moves up-down or side-to-side. Found in single- and double-handle configurations. Repair usually means pulling the cartridge and replacing it — often a 20-minute job once the handle is off.
3. Ceramic disc faucets — Two ceramic discs rotate against each other to control flow. These are durable; when they leak, the fix is usually cleaning mineral deposits off the discs rather than replacing them.
4. Compression faucets — The oldest design: a rubber washer presses against a seat to stop flow. These are the classic drippers. Every quarter-turn tightens the washer further, and eventually the washer wears out. Replacement costs under $2 in parts.

The basic repair sequence, regardless of type: shut off the supply stops (the oval valves under the sink — righty-tighty), open the faucet to release pressure, disassemble in the order the handle presents itself, identify the worn component, replace it, reassemble, restore water slowly, and check for leaks. Capturing that sequence before touching a wrench is what separates a 30-minute repair from a flooded cabinet.

For full replacement, the additional steps are disconnecting the supply lines (have a bucket — there will be residual water), unthreading the mounting nut beneath the sink deck, lifting out the old faucet body, and reversing the process with the new unit. Deck-mount faucets with 3 holes spaced at the industry-standard 4-inch or 8-inch centers are the easiest to swap without modifying the sink.

Common scenarios

Dripping from the spout: Almost always a worn internal seal — a washer in a compression faucet, O-rings in a ball faucet, or a degraded cartridge. The US Geological Survey notes that a faucet dripping once per second wastes more than 3,000 gallons per year (USGS Water Science School), which reframes a "minor annoyance" as a real utility cost.

Leaking at the base: O-rings around the faucet body or spout have failed. Disassembly and O-ring replacement is typically all that's needed.

Handle is stiff or seized: Mineral buildup on the cartridge or disc assembly. Soaking components in white vinegar dissolves calcium deposits without damaging brass or ceramic.

Low pressure from one fixture: The aerator (the small screen at the spout tip) is clogged. Remove it, soak in vinegar for 30 minutes, rinse, reinstall. This is the DIY repair that requires the least skill and delivers the fastest payoff.

Complete faucet replacement: Motivated by style update, corroded valve body, or a repair that costs more than a new mid-range fixture. A quality mid-range kitchen faucet from brands carried at major home centers runs $80–$250; a licensed plumber charges $45–$150 per hour (HomeAdvisor / Angi national cost data) for labor that a prepared DIYer can handle in under 2 hours.

Decision boundaries

Most faucet repairs belong squarely in the DIY column. The line shifts in a few specific cases:

• The supply stop won't close. If the stop valve under the sink is corroded open, the water can't be isolated without shutting off the main — and if the main shutoff is also unreliable, this becomes a plumber's call.
• Visible corrosion on supply lines or the faucet's mounting area. Corroded copper supply tubes or a rotted sink deck complicate what should be a simple swap and may involve repairs beyond the faucet itself.
• Integrated systems. Some high-end pull-down or touchless faucets include electronic solenoids and proprietary cartridges that require manufacturer-specific parts and diagnostic steps. Check the DIY vs. Hiring a Professional framework before committing.

For anyone building confidence before attempting a first repair, the DIY for Beginners section addresses tool selection and the mental framework of working with water supply systems. The full doityourselfauthority.com home base connects faucet work to the broader universe of home maintenance projects, from seasonal prep to structural repairs.

Tools needed are minimal — an adjustable wrench, channel-lock pliers, a flathead and Phillips screwdriver, and plumber's grease. The DIY Tools and Equipment page covers what's worth owning versus renting for single-use jobs.