Fixtures PhaseStep 23 of 27
Install the Bathroom Faucet
The faucet is a focal point of your vanity. Proper installation ensures reliable operation and prevents leaks for years to come.
Quick Summary
Time Needed
30-60 minutes
Cost
$50 - $500
Difficulty
Easy
Faucet Types
Single-Hole
One handle for hot/cold. Requires one faucet hole. Clean, modern look. Easiest to install.
Centerset
Two handles, 4" centers. Fits standard 3-hole sink. Most common for bathrooms.
Widespread
Separate spout and handles, 8"+ apart. Elegant look. Requires 3 holes in countertop.
Wall-Mount
Mounts to wall behind sink. Requires in-wall rough-in. High-end look. Professional install recommended.
Tools & Materials
Tools
- • Adjustable wrench
- • Basin wrench (for hard-to-reach nuts)
- • Flashlight
- • Bucket and towels
- • Pliers (channel-lock)
Materials
- • New faucet (with mounting hardware)
- • Supply lines (if not included)
- • Plumber's tape (Teflon tape)
- • Plumber's putty or silicone (for escutcheon)
Step-by-Step Installation
1
Turn Off Water Supply
- Locate shut-off valves under the sink
- Turn clockwise to close (righty-tighty)
- If valves are stuck, turn off main water supply
- Open faucet to release pressure and drain water
- Place bucket and towels under work area
2
Remove Old Faucet (If Replacing)
- Disconnect supply lines from faucet
- Remove mounting nuts under sink (basin wrench helps here)
- Lift out old faucet
- Clean sink surface of old putty or residue
3
Prepare New Faucet
- Read manufacturer's instructions (they vary by brand)
- Attach any supply lines to faucet body if required
- Install gasket or rubber plate on faucet base
- If no gasket, apply plumber's putty around faucet base
4
Install Faucet
- Insert faucet through sink hole(s)
- Thread supply lines/stems through hole
- From underneath, install mounting hardware (nuts, washers)
- Hand-tighten first, then snug with wrench
- Don't over-tighten—can crack sink or strip threads
- Check that faucet is aligned properly from above
Pro tip: Have a helper hold the faucet in position from above while you tighten from below.
5
Connect Supply Lines
- Connect hot supply line to hot valve (usually left)
- Connect cold supply line to cold valve (usually right)
- Hand-tighten first, then 1/4 turn with wrench
- Don't over-tighten compression fittings
- Use Teflon tape on threaded connections without gaskets
6
Install Drain (If Included)
- Apply plumber's putty around drain flange
- Insert drain through sink hole
- Thread on drain body from below
- Connect pop-up assembly to faucet lift rod
- Adjust pop-up stopper height as needed
7
Test for Leaks
- Turn on water supply slowly
- Check all connections for drips
- Run both hot and cold water
- Check under sink after 5 minutes
- Tighten any dripping connections 1/4 turn at a time
- Clean up any excess putty that squeezed out
Frequently Asked Questions
What tools do I need to install a bathroom faucet?
You'll need an adjustable wrench, basin wrench (for hard-to-reach nuts under the sink), plumber's tape, bucket and towels, and possibly a flashlight. Many modern faucets come with their own mounting hardware and don't require special tools.
Can I install a bathroom faucet myself?
Yes, bathroom faucet installation is a good DIY project for beginners. Most faucets come with detailed instructions. The hardest part is usually working in the cramped space under the sink. If you're replacing an old faucet with corroded connections, a plumber may be helpful.
Do I need to use plumber's tape on faucet connections?
Use plumber's tape (Teflon tape) on threaded connections that don't have rubber gaskets or washers. Most modern supply line connections use compression fittings or rubber gaskets that don't need tape. When in doubt, check the faucet instructions.