Install a Kitchen Sink Faucet: Easy Guide for Beginners

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To avoid unnecessary returns or frustration during installation, take the time to measure your current setup:

• Faucet hole spacing (center-to-center distance): Standard sinks usually have 1 to 4 pre-drilled holes.
• Spout height and reach: Ensure it fits under your cabinets and reaches the sink basin effectively.
• Under-sink space: Confirm there’s enough room to tighten mounting nuts and attach supply lines.

Use a measuring tape and note all dimensions before purchasing a kitchen sink faucet.

Before starting, gather the following tools and supplies:

Basic Tools:

• Adjustable wrench
• Basin wrench (essential for hard-to-reach mounting nuts)
• Phillips and flathead screwdrivers
• Bucket or shallow pan
• Flashlight or headlamp
• Towel or knee pad for comfort
• Plumber’s putty or silicone sealant
• Plumber’s tape (Teflon tape)
• Rags or sponge
• Utility knife (to remove old caulk or putty)

Faucet Kit Should Include:

• Faucet body
• Gasket or trim plate (escutcheon)
• Mounting hardware (nuts, washers, brackets)
• Pre-installed or attachable supply lines
• Pull-down hose (if applicable)
• Optional: soap dispenser or side sprayer

Tip: Always review the included parts against the manufacturer’s instruction manual.

• Clear out the area under the sink. Remove cleaning products, trash bins, and anything that could get in the way.
• Lay down towels or use a work mat to protect the cabinet base from water drips or tools.
• Set up a good light source—under-sink spaces are often dark.
• Read the faucet manual. Every brand and model has slight variations. Don’t skip this step.

• Find the hot and cold shut-off valves under the sink.
• Turn them clockwise until they’re fully closed.
• Turn on the faucet to release pressure and ensure the water is shut off.
• Place a bucket under the supply lines to catch any water still in the hoses.

What if you can’t find shut-off valves?

You may need to shut off the main water supply to your home. Learn how here: How to Shut Off Home Water Supply – Home Depot

• Use an adjustable wrench to disconnect the supply lines from the shut-off valves.
• Let the water drain into your bucket or pan.
• If supply lines are corroded or damaged, replace them with new ones.
• Label which line is hot and which is cold using masking tape or markers.

• Use a basin wrench to loosen the mounting nuts under the sink that hold the faucet in place.
• If your faucet has a spray hose, disconnect it from the diverter fitting.
• Carefully lift the faucet out from the top of the sink.
• Scrape off old plumber’s putty or silicone from the sink deck using a utility knife or putty scraper.
• Clean the sink surface with a damp cloth to ensure a tight seal for the new faucet.

How many holes does your sink have?

• 1-hole sinks: Ideal for single-handle or pull-down faucets.
• 3-hole sinks: Can accommodate traditional faucets or use an escutcheon to cover unused holes.
• 4-hole sinks: Often include space for a sprayer or soap dispenser.

Choose a kitchen sink faucet compatible with your sink configuration. If you’re converting a 3-hole sink to a single-hole faucet, install the provided deck plate to cover extra holes.

• If your faucet has a deck plate:
  • Place the deck plate gasket or apply plumber’s putty underneath it.
  • Center the deck plate over the sink holes and press it down firmly.
• Faucet body installation:
  • Insert the faucet body and supply lines through the mounting hole(s).
  • Under the sink, secure it with the provided washer and mounting nuts.
  • Use a basin wrench to tighten the nuts securely, but avoid over-tightening (can crack sink or damage threads).
  • Double-check the faucet alignment from above.

• Wrap Teflon tape around the threaded ends of the faucet’s supply lines.
• Attach the hot and cold supply lines to the corresponding shut-off valves.
• Tighten the connections with a wrench until snug—do not overtighten.
• If your faucet has a pull-down sprayer, attach the spray hose to the diverter and snap on the weight under the sink (as per instructions»).

• Open the shut-off valves slowly.
• Turn on the faucet and let both hot and cold water run for at least 1 minute.
• Check under the sink:
  • Supply line connections
  • Faucet mounting point
  • Sprayer hose and diverter connections
• Wipe everything dry and re-check for any leaks after 10–15 minutes.
• If you see small drips:
  • Tighten fittings slightly.
  • Check O-rings or washers.
  • Ensure the supply hoses aren’t twisted.

• Test water pressure and faucet handle operation.
• Make sure the faucet swivels correctly (if applicable).
• Replace everything under the sink.
• Clean up excess plumber’s putty or silicone.

If you prefer visual guidance, watching a step-by-step video can be very helpful. This video walks you through the process from start to finish and can give you a clearer understanding of each step.

Even with a correct installation, leaks may occur. Here’s how to troubleshoot:

• Tighten connections gently using a wrench, but avoid over-tightening plastic fittings.
• Check if the rubber washers or gaskets are misaligned or missing.
• Use Teflon tape on threaded pipe fittings to ensure a watertight seal.
• If the leak persists, it may be due to a cracked fitting—replacement might be necessary.

Still leaking? Don’t hesitate to consult a professional plumber.

• Soap Dispenser
• Side Sprayer
• Water Filter System»
• Touchless Faucet Power Module»

Follow brand-specific instructions when installing these components.

While DIY faucet installation is manageable for many homeowners, some situations call for expert help:

• Your shut-off valves are old, rusted, or leaking.
• The under-sink access is too tight or obstructed by garbage disposals or dishwashers.
• The new faucet requires modifications to your countertop or additional drilling.
• You’ve installed everything correctly, but there’s still a persistent leak.

You can search for licensed professionals at Angi – Faucet Installers Near You».

Now that your new kitchen sink faucet is installed, take a few steps to ensure it stays in top shape for years to come:

• Clean regularly with a soft cloth and mild soap. Avoid harsh chemicals that can damage the finish.
• Inspect supply lines annually for cracks, leaks, or signs of corrosion.
• Flush the aerator every few months, especially in areas with hard water. Simply unscrew it and soak in vinegar for 30 minutes.
• Check the sprayer hose weight (if applicable) to ensure smooth retraction.

This simple maintenance routine can greatly extend the life of your faucet.

Installing a kitchen sink faucet is a manageable DIY project when you’re well-prepared. With the right tools, clear steps, and attention to detail, you can upgrade your kitchen quickly and confidently. If challenges arise, don’t hesitate to seek professional help—and remember, regular maintenance keeps your faucet working like new.