How to Change a Kitchen Faucet
A kitchen faucet is one of the most frequently used fixtures in any home. Over time, even high-quality faucets can develop leaks, corrosion, or outdated looks. Changing a kitchen faucet not only restores functionality but can also upgrade the entire appearance of your sink area. This guide provides a comprehensive, step-by-step process for removing the old faucet and installing a new one properly — with clear explanations, practical tips, and helpful tables for quick reference.
1) Preparation: Tools, Parts, and Safety Measures
Before you begin, set up everything you need. Proper preparation ensures a smooth, leak-free replacement process.
Essential Tools and Materials
| Tool / Material | Purpose | Pro Tip |
|---|---|---|
| Adjustable wrench | Loosen and tighten nuts | Wrap jaws with tape to avoid scratching metal finishes |
| Basin wrench | Access deep or tight faucet mounts | Ideal for cramped spaces under the sink |
| Plumber’s putty / Silicone sealant | Create waterproof seals under the base | Use silicone for stainless sinks, putty for ceramic |
| Bucket / Towels | Collect residual water | Always place beneath valves before disassembly |
| Teflon tape | Prevent leaks in threaded fittings | Wrap threads clockwise three times |
| Flashlight or work light | Illuminate dark areas | Headlamps free your hands for easier work |
Steps to Prepare
Turn off the water supply
Locate the shut-off valves under the sink. Turn both hot and cold valves clockwise to close them fully. If they’re stuck, use gentle pressure with a wrench. Open the faucet to release remaining water pressure before proceeding.Clear out the workspace
Remove everything stored beneath the sink, such as cleaners or sponges. You need unrestricted access to the water lines and mounting hardware.Disconnect the supply hoses
Use the adjustable wrench to detach the flexible hoses from the shut-off valves. Keep a bucket below to catch any residual water. Avoid twisting the lines excessively to prevent damage to the valve threads.Inspect the sink and faucet layout
Identify the number of mounting holes — one, two, or three — to ensure compatibility with your new faucet. If there are extra holes, you’ll need a deck plate (escutcheon) to cover unused ones.
2) Removing the Old Faucet
Taking out the existing faucet can be challenging if it’s corroded or has limited access beneath the sink. Patience and the right method will prevent unnecessary damage.
Step-by-Step Removal Process
Loosen mounting nuts
Use a basin wrench to reach up and loosen the nuts that secure the faucet to the sink or countertop. Old faucets may have metal nuts fused with rust or mineral deposits. Apply penetrating oil and wait a few minutes before turning again.Disconnect sprayer or side hose (if applicable)
If your faucet includes a side sprayer, find the diverter connection under the faucet body. Use pliers to gently disconnect the hose fitting. Mark the hot and cold lines with tape to avoid confusion during reinstallation.Remove faucet body
Once all nuts are loosened, carefully lift the faucet assembly from above the sink. If it’s stuck to the surface due to dried putty or corrosion, use a putty knife to loosen the seal gently. Avoid prying too hard to prevent scratching the sink.Clean the sink surface
Remove old putty or residue using warm soapy water or white vinegar. Wipe it dry completely. A clean surface ensures a proper watertight seal for the new faucet.
3) Installing the New Faucet
Installing the replacement faucet is where precision matters most. Aligning and tightening correctly ensures smooth operation and prevents leaks in the long term.
Step-by-Step Installation
Step 1: Apply the seal
Place the new faucet’s rubber gasket or apply a thin ring of plumber’s putty around the base. This seal prevents water from leaking under the faucet. If using a deck plate, install it before setting the faucet body.
Step 2: Position the faucet
Feed the faucet’s hoses and threaded shank through the mounting hole(s). Align the spout so it faces forward. Have someone hold it steady above while you work below.
Step 3: Tighten the mounting hardware
From beneath the sink, slide on the gasket, washer, and mounting nuts. Hand-tighten first, then use a basin wrench for the final ¼ turn. Over-tightening can crack porcelain or warp thin stainless steel, so tighten gradually and evenly.
Step 4: Connect the supply lines
Attach the faucet’s hot and cold lines to the corresponding shut-off valves. Wrap Teflon tape on the valve threads before connecting. Tighten the compression nuts by hand, then use a wrench for a gentle snug finish—no more than ¼ additional turn.
Step 5: Connect pull-down or side sprayer (if included)
Feed the sprayer hose through the spout or side opening and attach it to the quick-connect fitting. Listen for a “click” sound, confirming a secure lock. Install the weight on the hose under the sink to help the sprayer retract smoothly.
Connection Reference Table
| Connection Type | Where It Goes | How to Secure | Common Mistake |
|---|---|---|---|
| Hot water line | Left shut-off valve | Hand-tighten + ¼ turn | Overtightening causing leaks |
| Cold water line | Right shut-off valve | Same method | Cross-threading |
| Spray hose | Faucet outlet | Push until it clicks | Forgetting to attach the counterweight |
| Mounting nuts | Underside of sink | Even tightening | Uneven torque causing wobble |
Step 6: Attach the aerator and test fit
Before running water, check the faucet alignment and handle clearance. The handles should move freely without hitting walls or backsplashes. Once satisfied, screw the aerator onto the spout tip for splash control.
4) Testing, Adjusting, and Maintenance
After installation, testing the faucet properly ensures that every connection is sealed and the water flows smoothly. Ongoing maintenance will keep it performing perfectly for years.
Testing Procedure
Turn on the valves slowly
Open both shut-off valves under the sink. Allow the faucet to fill the lines gradually. Listen for gurgling—this is air escaping, which is normal for new installations.Flush the faucet
Remove the aerator and run water for 2–3 minutes to clear any debris from manufacturing or installation. Replace the aerator after flushing.Check for leaks
Use a paper towel to inspect each connection under the sink. If dampness appears, gently tighten that connection by ⅛ turn. Never overtighten to the point of distortion.Test water pressure and spray function
Toggle between hot and cold sides, and pull down the sprayer to ensure smooth extension and retraction. Adjust the counterweight position if the hose doesn’t retract fully.Inspect the faucet base
Wipe around the faucet’s base and check for any seepage. If you spot moisture, apply a small bead of clear silicone around the edge and smooth it evenly.
Maintenance Table
| Maintenance Task | Frequency | Purpose | How to Perform |
|---|---|---|---|
| Clean aerator | Every 3 months | Remove mineral buildup | Unscrew, soak in vinegar, rinse |
| Inspect hoses | Twice a year | Detect early wear | Look for cracks or leaks under sink |
| Check sealant | Every 6 months | Prevent moisture damage | Reapply silicone if gaps appear |
| Flush faucet | Monthly | Maintain clean flow | Run hot water for 2 minutes |
Common Problems After Installation
Low water flow: Usually caused by debris trapped in the aerator; cleaning it restores pressure.
Dripping spout: Check if supply hoses are too tight or washers are misaligned.
Loose handle or base: Tighten the mounting nut slightly or verify the gasket is seated evenly.
Final Tips for a Professional Finish
Use gentle torque: Plumbing fixtures don’t need extreme force. Overtightening is one of the most common causes of leaks and damage.
Organize hoses neatly: Use clips or ties to keep supply lines from touching hot pipes or moving parts under the sink.
Keep replacement parts: Store the installation manual and spare washers in a labeled bag for future reference.
Polish the faucet: After completing the job, clean fingerprints or sealant residue with a soft cloth for a showroom-quality finish.
Conclusion
Changing a kitchen faucet is one of the most rewarding DIY home upgrades. With preparation, precision, and patience, the entire project can be completed in under an hour. Each step — from removing the old faucet to sealing the new one — contributes to a watertight, durable result that enhances both the functionality and aesthetics of your kitchen.
A properly installed faucet not only looks great but also helps conserve water, improves workflow, and boosts hygiene. Whether you choose a modern pull-down model or a classic dual-handle design, following the detailed process above ensures a professional-grade installation that will serve your home reliably for years to come.