Kitchen Faucet Leaking? How to Fix Spout, Base, Handle, and Hose Leaks

A kitchen faucet leak does not always come from the same part. A drip from the spout usually points to a cartridge, washer, or valve seat. Water around the base commonly comes from worn O-rings, while a wet cabinet may indicate a loose supply connection, mounting gasket, or damaged pull-down hose.

Start by shutting off the water and identifying exactly where the leak begins. Most common repairs require only basic tools and a correctly matched replacement part. Stop DIY work if the faucet body is cracked, fasteners or threads are stripped, a shutoff valve will not close, or the leak continues after the correct parts have been installed.

Start With Safety

Before removing any faucet component:

1. Close the hot and cold shutoff valves under the sink by turning them clockwise.
2. Open the faucet to relieve pressure and drain remaining water from the line.
3. If either shutoff valve will not close fully, turn off the home's main water supply.
4. Place a bucket and towels below the plumbing before loosening any connection.
5. Never disassemble a faucet while the supply lines are still pressurized.

If water is spraying continuously, reaching an electrical outlet, or leaking from a pipe inside the wall or floor, stop and call a licensed plumber.

Find the Leak Before Buying Parts

A replacement cartridge or O-ring will not solve the leak if the water is coming from a different location. Use a dry-surface test to identify the first point where water appears.

The dry-surface water test

1. Clear the area under the sink and dry the faucet handle, spout, base, supply lines, and the cabinet floor.
2. Turn the water back on and run the faucet.
3. Move the handle from cold to hot and turn the spout from side to side.
4. Shut off the faucet and watch for several minutes without touching it.
5. Check under the sink with a flashlight and a dry paper towel. A paper towel reveals even a small amount of moisture.

Wipe each connection separately. The first wet point is more reliable evidence than the largest puddle, because water often runs along the faucet body or hose before collecting somewhere else.

What each leak location usually means

Identify Your Faucet Mechanism

The internal parts vary by faucet design. Check the model number on the faucet body, under the deck, or on a tag near the supply lines. Take photos before disassembly and keep small parts in order.

Use the parts specified for your exact model. A cartridge or O-ring that looks similar may have a different dimension, port position, or sealing surface. Generic O-rings may work in some simple applications, but the cartridge should normally match the manufacturer's specification.

Tools and Parts to Prepare

Most repairs can be completed with:

• Adjustable wrench
• Basin wrench for hard-to-reach mounting nuts
• Phillips and flat-head screwdrivers
• Allen key set
• Needle-nose pliers
• Small pick or plastic scraper for O-rings
• Flashlight or headlamp
• Bucket and absorbent towels
• Plumbing-safe silicone grease, when recommended
• PTFE tape only where the manufacturer specifies it

Before starting, write down or photograph:

• Faucet brand and model number
• Old part number, if visible
• Orientation of the cartridge or handle
• Hose, weight, and mounting-nut positions

Repair the Leak by Symptom

1. The spout drips when the faucet is off

A drip that continues after the handle is closed means water is bypassing the main shutoff mechanism inside the faucet.

Compression faucet

1. Shut off the water and open the faucet to release pressure.
2. Remove the handle cap, screw, and handle.
3. Loosen the packing nut and remove the stem.
4. Replace the rubber seat washer and stem O-ring.
5. Inspect the valve seat. If it is pitted, resurface it with the correct tool or replace the seat.
6. Reassemble and restore the water slowly.

Cartridge faucet

1. Shut off the water and remove the handle.
2. Remove the trim, retaining clip, or bonnet nut.
3. Pull the cartridge straight out without twisting or forcing the faucet body.
4. Clean mineral buildup from the cavity without scratching the sealing surfaces.
5. Lubricate the new cartridge O-rings only if the manufacturer recommends it.
6. Align the new cartridge exactly like the old one, reinstall the retainer, and test.

Ball faucet

1. Shut off the water and remove the handle.
2. Remove the cap and collar, then the cam, washer, and ball.
3. Remove the old springs and seats.
4. Install new springs and seats in the correct orientation.
5. Reassemble the ball, cam, washer, cap, and handle.
6. If the base is also wet, remove the spout and replace its O-rings.

Ceramic disc faucet

1. Shut off the water and remove the handle and trim.
2. Remove the retainer nut or screws.
3. Pull out the ceramic cartridge or cylinder.
4. Replace the complete cartridge when available. If the manufacturer permits it, replace only the inlet seals and reuse the cartridge.
5. Reassemble and turn the water on slowly to avoid pressure shock.

2. Water leaks around the faucet base

A base leak that appears mainly when the faucet is running often comes from the O-rings that seal the swivel spout to the faucet body. Repeated movement, hot and cold water, and mineral buildup can flatten, crack, or dry out these rings.

1. Shut off the water and relieve pressure.
2. Remove the handle and any trim needed to access the spout retaining clip or nut.
3. Lift or twist the spout off according to the manufacturer's instructions.
4. Remove the old O-rings with a small pick. Do not scratch the metal or plastic sealing surface.
5. Clean the O-ring grooves and remove mineral deposits.
6. Apply a thin coat of plumbing-safe silicone grease if approved by the manufacturer.
7. Install O-rings of the exact size and shape, then seat them evenly in the grooves.
8. Reinstall the spout, handle, and trim.
9. Restore the water slowly and test with the faucet on, off, hot, cold, and swiveling.

If the faucet feels loose or shifts when touched, also inspect the mounting nuts under the sink. Tighten them until the faucet is secure, but do not overtighten and crack the sink or mounting hardware.

If the faucet still leaks at the base after the O-rings are replaced, inspect the spout and faucet body for hairline cracks. A cracked body or spout usually cannot be repaired reliably.

3. Water appears around the handle

A handle leak usually points to a worn cartridge seal, handle O-ring, or a packing nut that has loosened.

1. Confirm that the leak is at the handle and not running down from the spout.
2. Shut off the water and remove the handle.
3. Inspect the cartridge O-rings and the area around the retaining nut.
4. Replace damaged seals or the complete cartridge when its internal seal has failed.
5. Snug a loose packing nut, but stop if it becomes difficult to turn or the handle binds.
6. Reassemble and test with the handle in several positions.

4. The spray head or pull-down hose leaks

Pull-down and pull-out faucets add moving seals and a flexible hose. A leak that appears at the base may actually begin at the spray-head connection or at a fitting beneath the sink.

Check the spray head first

1. Unscrew the spray head by hand.
2. Inspect the small washer or O-ring inside the connection.
3. Clean the screen and remove grit or mineral deposits.
4. Replace a cracked, flattened, or brittle seal.
5. Screw the head back on until it is hand-tight, then test.

Inspect the full hose

1. Shut off the water and pull the hose completely out.
2. Run a dry hand along its length, including the counterweight and connection points.
3. Look and feel for cracks, swelling, fraying, kinks, or damp spots.
4. Tighten a loose threaded connection only if the fitting and seal are in good condition.
5. Replace the hose if it is damaged. Tape or sealant is not a safe permanent repair for a cracked pressure hose.

When reconnecting the hose, make sure it is not twisted. Reinstall the counterweight in the position marked or shown by the manufacturer, then test the sprayer through several full pull-out and retraction cycles.

5. The cabinet is wet under the sink

An under-sink leak may come from the supply lines, shutoff valves, faucet mounting area, or pull-down hose.

1. Dry every visible connection with a paper towel.
2. Check the hot and cold supply lines at both the shutoff valve and the faucet inlet.
3. Inspect the faucet mounting hardware and deck gasket from below.
4. Check the pull-down hose along its full length and around the counterweight.
5. Turn the water on and watch for the first reappearing drop.

For a loose compression nut:

1. Shut off the water before working on the connection.
2. Hold the fitting steady and tighten the nut approximately one-quarter turn.
3. Restore the water and inspect for several minutes.
4. If it still leaks, disassemble the connection and inspect the ferrule or gasket.
5. Replace the supply line if the nut is stripped, the line is cracked or corroded, or the fitting will not seal without excessive force.

Overtightening can crush the seal and make the leak worse. If the shutoff valve itself is leaking or will not close, stop and have it replaced by a plumber.

Reassemble and Test the Repair

1. Reinstall parts in reverse order and align the cartridge or handle exactly as photographed.
2. Start threaded parts by hand before using a wrench.
3. Tighten fasteners until snug. Stop before the part deforms, cracks, or becomes difficult to turn.
4. Turn the shutoff valves on slowly.
5. Leave the faucet open at first so trapped air can escape.
6. Test the faucet off, on, hot, cold, and swiveling.
7. Operate the sprayer and pull the hose through its full range.
8. Dry the connections and check again after several minutes.
9. Inspect under the sink again after several hours of normal use.

If the Leak Continues

Do not repeatedly tighten a connection that has already failed. Continued force can damage the valve, faucet inlet, or supply line.

When to Stop DIY Work

Call a licensed plumber or contact the faucet manufacturer when:

• The main or fixture shutoff valve will not stop the water.
• A supply pipe inside the wall or floor is leaking.
• The faucet body, spout, or mounting surface has a visible crack.
• A screw, mounting nut, or threaded fitting is stripped or seized.
• Corrosion or mineral damage has weakened the faucet body.
• Water is leaking from several locations at once.
• The correct replacement parts still do not stop the leak.
• The cabinet has swelling, mold, or long-term water damage.
• Electrical wiring or an outlet is wet or close to the leak.
• You cannot identify the model or obtain the correct replacement parts.

Before contacting support, prepare the faucet model number, clear photos of the leak and internal parts, the part numbers already replaced, and the purchase receipt or order number.

Prevent Another Leak

• Clean the aerator when flow becomes uneven or spray patterns change.
• Wipe the faucet with a soft cloth and mild soap instead of abrasive cleaners.
• Address hard-water deposits before they harden around seals and moving parts.
• Watch for a handle that becomes stiff, gritty, or difficult to turn.
• Check under the sink with a flashlight several times a year.
• Keep the faucet and mounting hardware secure so the seals are not stressed by movement.
• Use only replacement parts that match the faucet model and series.

Repair or Replace?

Repair is usually reasonable when:

• The faucet is otherwise in good condition.
• The correct replacement part is available.
• This is the first significant leak.
• The leak comes from a replaceable cartridge, washer, O-ring, seat, or hose.

Replacement is usually more practical when:

• The body or spout is cracked.
• Corrosion has spread through the faucet.
• Fasteners or threads are stripped.
• The model is discontinued and the correct parts are unavailable.
• Leaks return repeatedly despite correct repairs.
• Repair costs approach the price of a comparable new faucet.

When replacing the faucet, record the deck thickness, number of installation holes, hole spacing, supply-line length, and available clearance under the sink. Those measurements help prevent a second installation problem after the leak is solved.

Frequently Asked Questions

Where should I start if I do not know where the leak is coming from?

Dry the entire faucet and cabinet, restore the water, and watch for the first bead of moisture. Test the faucet on, off, hot, cold, and while swiveling the spout. Check the sprayer and under-sink connections separately.

Why does my kitchen faucet still leak after I replace the cartridge or O-rings?

The replacement part may not match the model, an O-ring may be pinched, the cartridge may be misaligned, or a valve seat or faucet body may be damaged. Compare the old and new parts carefully and inspect all sealing surfaces before buying more parts.

Is a leak at the faucet base always caused by O-rings?

No. Worn spout O-rings are common, but loose mounting hardware, a failed deck gasket, a damaged cartridge, or a crack in the spout or body can produce a similar leak.

Can I tighten a supply-line nut without shutting off the water?

No. Shut off the supply before working on any pressurized connection. A small leak can quickly become a spray if the nut or line moves while under pressure.

Can I use a generic cartridge?

A generic O-ring may work for a simple seal, but cartridges and complex seals should match the faucet model and series. A small difference in dimensions or port position can cause continuing leaks or handle problems.

Is it worth replacing the whole faucet instead of repairing it?

Repair is often the better choice when the faucet is in good condition and the correct part is available. Replacement becomes more practical when the body is cracked or corroded, parts are discontinued, or the same leak returns after correct repairs.

Final Check

A successful kitchen faucet repair starts with identifying the leak location, not replacing parts by guesswork. Shut off the water, test the faucet under realistic conditions, use the correct model-specific parts, and check both the faucet and the cabinet after reassembly.

If the leak cannot be stopped safely, or if the faucet body or plumbing is damaged, stop DIY work and contact a qualified plumber or the manufacturer's support team with the model number, photos, and parts already replaced.

For a replacement faucet, choose a model that matches your sink configuration, installation-hole layout, clearance, and daily workflow. Explore GRANDJOY kitchen faucets for compatible designs built for reliable everyday use.