4 min reading time
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Updated Recently
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2 hrs active work
$120 - $400
Tools (12)
Materials (8)
Kitchen Faucet(1 each)
~$150
Supply Lines(2 each)
~$15
Plumbers Putty(1 each)
~$5
Thread Seal Tape(1 roll)
~$3
Kitchen faucet (match hole layout)(1 each)
~$150
Braided stainless supply lines (pair)(1 each)
~$30
Plumber's putty or gasket kit(1 each)
~$5
Thread seal tape(1 each)
~$3
Estimated Total
$120 - $400
Swap an old kitchen faucet for a new one: shut off supply valves, disconnect lines, remove the old fixture, and mount the new faucet with fresh braided supply lines. Most installs take 1–2 hours with basic tools.
Skill level: Beginner–intermediate · Typical time: 1–2 hours · Cost range: $120–400 depending on faucet style.
Read the new faucet instructions. Verify it fits your sink (check number of holes and spacing). Measure supply line length needed (shutoff to faucet inlet). Gather all tools before starting.
Tools
Materials
Tips
Standard faucet hole spacing is 8 inches center-to-center for 3-hole
Single-hole faucets come with deck plates to cover extra holes
New supply lines are recommended if existing ones are over 5 years old
Locate the shutoff valves under the sink (hot and cold). Turn both valves clockwise to close. Open the faucet to release pressure and drain remaining water. Place a bucket under connections.
Tools
Tips
If valves are stuck, apply penetrating oil and wait 15 minutes
If valves won't fully close or leak through, shut off main house valve
Old gate valves may need replacement - consider upgrading to ball valves
Warning
If shutoff valves leak when closed, you may need to shut off main water
Have towels ready - some water will drain from lines
Use an adjustable wrench to disconnect supply lines from the shutoff valves and from the faucet inlets. Have bucket positioned to catch water. Remove and discard old supply lines if replacing.
Tools
Tips
Take a photo of connections before disconnecting
Hold the shutoff valve body with pliers while loosening nut to prevent valve damage
Counter-clockwise to loosen (lefty-loosey)
Use a basin wrench to reach the mounting nuts under the sink. Loosen and remove the nuts. For stuck nuts, apply penetrating oil. Once nuts are removed, lift faucet out from above.
Tools
Tips
Basin wrench pivots - position jaw on nut, then swing handle to turn
Work from under sink - a flashlight or headlamp helps greatly
If nut is corroded solid, you may need to cut it off with a hacksaw
Clean old putty, caulk, and debris from the sink surface where the new faucet will sit. Ensure holes are clear. Dry surface completely.
Tools
Tips
Plastic putty knife won't scratch sink surface
Mineral deposits can be removed with vinegar
A clean, dry surface ensures a good seal
Follow manufacturer instructions. Apply plumber's putty or included gasket under faucet base. Insert faucet through holes, then secure with mounting hardware from below. Tighten evenly.
Tools
Materials
Tips
Don't overtighten - can crack sink or damage faucet
Some faucets use silicone instead of putty - check instructions
Hand-tighten first, then snug with wrench
Connect new supply lines to faucet inlets (hand-tighten, then 1/4 turn with wrench). Connect other ends to shutoff valves. Apply thread tape to valve threads if needed. Don't overtighten.
Tools
Materials
Tips
Wrap thread tape clockwise (when looking at thread end)
Braided stainless lines are best - don't reuse old plastic lines
Hand-tight plus 1/4 turn is usually sufficient
Warning
Overtightening can crack fittings or damage valves
If your faucet has a pull-down sprayer or separate sprayer, connect the hose according to manufacturer instructions. Route hose to avoid kinks. Test retraction mechanism.
Tips
Sprayer hose should move freely without catching
Weight on hose helps sprayer retract automatically
Check that quick-connect fittings click securely
Slowly turn on shutoff valves. Check all connections for leaks: valve connections, faucet inlets, and faucet base. Run water for several minutes and check again. Test hot and cold.
Tools
Tips
Turn valves on slowly to prevent water hammer
Run finger along connections to feel for moisture
Check again after 15 minutes and again tomorrow
Warning
If any connection leaks, turn off water and retighten
If leak persists after tightening, disconnect and check for debris/damage
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