Fixing a Leaking Faucet Like: A Complete Step-by-Step Guide

Before You Start: Important Notes

• You do not need to be a plumber to do this, but you do need patience.
• Read through the entire guide once before starting so you know where you’re going.
• If at any point something feels unsafe, extremely corroded, or “not right,” it’s okay to stop and call a licensed plumber.

Step 1: Identify Where & How It’s Leaking

Different leak locations usually mean different problems. First, observe:

1. Drip from the spout
   • Constant drip or slow drip even when handles are fully off.
   • Most common cause: worn cartridge, washer, or seal.
2. Leak around the handle(s)
   • Water appears on top of the sink deck when faucet is running.
   • Likely: worn O-rings or stem packing.
3. Leak at the base of the spout
   • Water puddles around the faucet body when running.
   • Often: worn O-rings or seals inside the body.
4. Leak under the sink
   • Water on cabinet floor, on supply lines, at shutoff valves, or where faucet mounts.
   • Could be: loose nut, bad supply line, leaking pull-out hose, or failed gasket.
5. Side sprayer or pull-down hose leak
   • Sprayer drips, hose sprays when moving, or water comes from under handle when using sprayer.
   • Usually: cracked hose, worn connection, or diverter issue.

Make a mental note (or snap a photo) of what you see. This will guide the repair path.

Step 2: Identify Your Faucet Type

Look at your faucet and match it:

1. Compression Faucet (older style, 2 handles)
   • Separate hot and cold handles.
   • Handles turn multiple times to open/close.
   • Inside: rubber washer at the end of a stem.
2. Cartridge Faucet (1 or 2 handles)
   • Handle(s) move about 1/4 turn or so.
   • Smooth operation.
   • Inside: a cartridge that controls flow and temperature.
3. Ceramic Disc Faucet
   • Single lever or two handles, usually modern and heavy.
   • Very smooth, often a wide cylindrical body.
   • Inside: ceramic disc cartridge.
4. Ball Faucet (older single-handle)
   • Rounded dome or ball-shaped cap below the handle.
   • Often found on older kitchen sinks.
   • Inside: ball, springs, and rubber seats.

If you’re unsure, search the brand/series name stamped on the faucet body, or compare visually to manufacturer diagrams. When in doubt, treat it as cartridge-style; most modern single-handle faucets are.

Step 3: Gather Tools & Materials

Set yourself up properly; it makes everything easier.

Basic Tools:

• Adjustable wrench
• Phillips and flathead screwdrivers
• Allen/hex keys (often needed for handles)
• Slip-joint pliers or channel locks
• Utility knife
• Needle-nose pliers

Helpful Extras:

• Plumber’s grease (silicone-based)
• White vinegar or descaling solution
• Clean rags or paper towels
• Small bowl or tray (for screws and parts)
• Flashlight or headlamp
• Tape measure (for cartridge or O-ring sizing)

Likely Replacement Parts:

• Faucet-specific cartridge or stem
• O-rings
• Rubber washers
• Springs and seats (for ball faucets)
• New supply lines, if yours look corroded or kinked

Tip: If you don’t know what parts you need, disassemble first, take the parts to the store, and match them.

Step 4: Shut Off the Water (Do NOT Skip)

1. Locate shutoff valves under the sink:
   • You should see two small valves on the hot and cold lines.
   • Turn them clockwise until snug. Do not overforce.
2. If no shutoffs or they don’t work:
   • Turn off the main water supply to the house.
3. Relieve pressure:
   • Turn on the faucet to confirm water is off.
   • Leave it open while you work for a moment to drain remaining water.
4. Plug the drain:
   • Use a sink plug or stuff a rag. You do not want small screws disappearing.

If water doesn’t shut off fully or valves leak, plan to replace those valves or call a pro. Do not proceed with full pressure live; it will get messy fast.

Step 5: Disassemble the Faucet (General Process)

These steps are the foundation. Exact details vary by type, which I’ll break down next.

1. Remove decorative caps:
   • Look for small caps labeled H/C or logo on top/side of handles.
   • Pry gently with a small flathead screwdriver or utility knife.
2. Remove handle screws:
   • Use correct screwdriver or Allen key.
   • Keep each screw in a parts tray.
3. Lift off the handle:
   • Wiggle gently. If stuck, do not pry aggressively on visible surfaces; it can scratch.
   • For stubborn handles: apply a few drops of penetrating oil, wait a bit, or use a handle puller if needed.
4. Expose the internal parts:
   • Under the handle you’ll see a cap, retaining nut, or cartridge/stem.
5. Take photos as you go:
   • Every stage. If you get lost, photos save you.

Now let’s handle specific types and leak locations.

Step 6: Fixing a Dripping Spout

A. Cartridge Faucet (Most Common Modern Faucet)

Symptoms: Drip from spout when off; sometimes difficulty mixing temperature.

Steps:

1. Follow general disassembly to remove handle.
2. Remove retaining nut or clip:
   • Use adjustable wrench for nut or small screwdriver/pliers for U-shaped clip.
3. Pull out the cartridge:
   • Grab the stem and pull straight up.
   • If stuck, gently twist while pulling. Avoid bending.
4. Inspect the cartridge:
   • Look for tears, cracks, warped rubber, or mineral buildup.
5. Option 1: Clean
   • If parts look intact: soak in vinegar, scrub gently.
   • Clean inside faucet body as well; rinse debris.
6. Option 2: Replace
   • Preferable if drip has been long-term.
   • Take old cartridge to store for precise match.
7. Lubricate:
   • Light coat of plumber’s grease on O-rings.
8. Reinstall:
   • Align tabs/pins exactly as original (photos help).
   • Install cartridge, clip or nut snugly (do not overtighten).
9. Reassemble handle and test (see Step 10).

If it still drips: confirm you installed correct cartridge and orientation. Re-seat it and retest.

B. Compression Faucet (Two Handles, Turn-Turn-Turn Style)

Symptoms: Drip from spout; usually one side (hot or cold) causes it.

Steps:

1. Remove decorative cap and screw.
2. Remove the handle.
3. Use wrench to unscrew the stem assembly (the whole piece that comes out).
4. At the bottom of the stem, locate the rubber washer held with a small screw.
5. Inspect:
   • If washer is hardened, cracked, or misshapen, replace it.
   • Check the brass seat inside faucet body:
     • If it’s rough or grooved, use a seat wrench to remove and replace it.
6. Install new washer:
   • Match size exactly.
   • Tighten the small screw (not too aggressive).
7. Reinstall stem:
   • Thread in by hand first to avoid cross-threading.
   • Tighten snugly.
8. Repeat for the other side if needed.
9. Reassemble handles and test.

Common mistake: overtightening handles to “stop” the leak, which actually destroys washers faster. Once repaired, close handles gently.

C. Ceramic Disc Faucet

Symptoms: Drip from spout, usually in high-end/modern faucets.

Steps:

1. Remove handle to expose the disc cartridge.
2. Remove the mounting screws or retaining ring.
3. Lift out the ceramic disc cartridge.
4. Rinse with water; clean debris, but do not scratch ceramic.
5. Inspect rubber seals under/on the cartridge:
   • If worn or flattened, replace seals or cartridge.
6. Reassemble carefully in the same orientation.

If drip remains and parts are worn, replacing the entire ceramic cartridge is usually the cure.

D. Ball Faucet (Older Single Handle, Especially Kitchen)

Symptoms: Drip, poor temperature control, leaking at base.

Steps:

1. Remove handle and dome cap.
2. Lift out the ball.
3. Under the ball, you’ll see rubber seats and springs.
4. Remove and replace:
   • Install new springs and seats (pointed end of spring goes into seat).
5. Inspect ball:
   • If pitted or worn, replace it.
6. Reassemble.
7. Adjust tension screw at top (if present) so handle moves smoothly and seals well.

Most hardware stores sell complete ball faucet repair kits.

Step 7: Fixing Leaks at Handle or Base

Handle Leak (Water Around Handle When Running)

Likely cause: worn O-rings or stem seals.

1. Disassemble handle as above.
2. For cartridge or stem:
   • Slide off old O-rings.
   • Clean grooves.
   • Install new O-rings of matching size.
   • Coat lightly with plumber’s grease.
3. Reassemble and test.

Base Leak (Water Around Faucet Body When Running)

Common on single-handle kitchen faucets.

1. Remove handle.
2. Look for large O-rings around spout or body.
3. Pull spout straight up to expose O-rings.
4. Replace O-rings and lubricate.
5. Check base gasket where faucet meets sink:
   • If deteriorated, replace or apply a neat bead of 100% silicone under base and remount faucet.

Step 8: Fixing Leaks Under the Sink

If you see water in the cabinet:

A. Supply Line Connections

Check 3 key spots:

1. At the shutoff valve
2. At the faucet tailpiece
3. Along the hose itself

Steps:

1. Dry everything with a towel.
2. Turn water on slightly and watch:
   • If a joint seeps, tighten the nut just a bit with a wrench.
3. If tightening does not solve it:
   • Replace the supply line. Always better than guessing.
4. If shutoff valve leaks from the stem or body:
   • It often needs replacement. This may require shutting off house main and, for many DIYers, is a good “call a plumber” point.

B. Faucet Mounting Leaks

If water runs down from above:

1. Check that faucet mounting nuts are snug.
2. Check that gasket or silicone seal under faucet base is intact.
3. If missing/damaged:
   • Loosen faucet, clean area, install new gasket or silicone, and remount evenly.

Step 9: Side Sprayer or Pull-Down Sprayer Leaks

1. Sprayer drips after use:
   • Normal for a few seconds; constant dripping means worn diverter or sprayer head.
2. Hose leaks when moving:
   • Inspect full hose length.
   • Replace hose if cracked or worn.
3. Leak at spray head connection:
   • Remove head, check washer.
   • Replace washer if deformed.

Many modern faucets use brand-specific hoses and heads; match by brand/model.

Step 10: Reassemble, Flush, and Test Properly

Now bring it all back together the right way.

1. Reassemble faucet in exact reverse order:
   • Use photos for guidance.
   • Confirm cartridges/discs/ball/washer seats are aligned correctly.
2. Open shutoff valves slowly:
   • Turn counterclockwise gently.
3. Purge air:
   • Turn faucet handle to open both hot and cold.
   • Expect spitting air for a few seconds.
4. Check all leak points:
   • Spout: No dripping after off.
   • Handle: Dry while on and off.
   • Base: Dry while running.
   • Under sink: Run hot and cold for at least 30–60 seconds while checking with a flashlight.
5. Wipe everything dry, then recheck after 5–10 minutes:
   • Any new moisture means something still loose, misaligned, or worn.

If everything stays dry: ✅ you’ve fixed your leaking faucet.

Step 11: When You Should Call a Professional

Even with perfect instructions, some situations are better handled by a licensed plumber:

• Shutoff valves won’t close or break when you touch them.
• Faucet body or threads are cracked.
• Heavy corrosion, green/white crust everywhere, parts fused.
• You replaced parts and it still leaks.
• You see water staining below, swollen cabinets, or mold; that suggests a long-term leak.
• You’re uncomfortable working near electrical outlets or garbage disposals.

There is zero shame in that. Catching a problem early and calling a pro often costs less than repairing major damage later.