A kitchen faucet that keeps dripping or leaves water around the handle can waste water and make a simple cleanup frustrating. The good news is that some leaks can be fixed with a replacement cartridge, O-ring, or other compatible part. The important first step is to identify where the water is coming from—because different leaks have different causes.
This guide explains how to inspect a leaking kitchen faucet, which parts may need attention, and how to test your repair. Faucet designs vary, so use the instructions for your exact model whenever they differ from the general steps below.
First, Find Where the Faucet Is Leaking
Dry the faucet and the area beneath the sink with a cloth, then run the water briefly and watch where moisture appears. This quick check can help you avoid taking apart components that are not causing the problem.
| Where You Notice Water | Possible Cause | What to Check |
|---|---|---|
| Water drips from the spout when the faucet is off | Worn or damaged cartridge, valve, or internal seal | Identify the faucet type and inspect the compatible cartridge or valve assembly. |
| Water appears around the handle or faucet base while running | Worn seals, a loose component, or water escaping from another point above | Dry the area and observe exactly where the water first appears. |
| Water collects inside the cabinet beneath the sink | Supply-line connection, hose, mounting area, or another plumbing connection | Use a dry paper towel to check each connection while the water is briefly running. |
| Water leaks from the pull-down hose or spray head connection | Damaged hose, seal, spray head, or connection | Inspect the hose and connection according to the faucet's service instructions. |
Tools and Replacement Parts
Gather the tools before disassembly so you do not have to leave an open faucet partway through the repair.
- Adjustable wrench, used carefully to avoid scratching the finish.
- Phillips and flathead screwdrivers, or the hex key required by your handle.
- Soft cloth or towel to protect the faucet finish and sink surface.
- Small container for screws and other small parts.
- Flashlight and paper towels for locating moisture.
- Replacement cartridge, O-rings, washers, hose, or other part confirmed for your faucet model.
Before buying replacement parts, find the faucet's model number or product documentation. Parts that look similar may have different dimensions or fittings. Do not force a cartridge or seal that does not fit correctly.
Step 1: Shut Off the Water and Prepare the Sink
- Locate the hot- and cold-water shut-off valves beneath the sink.
- Turn both valves clockwise by hand, where possible, to close them. Do not force a seized or corroded valve.
- Open the faucet handle to release the remaining pressure and drain water from the line.
- Cover the drain so small screws or clips cannot fall into it, and place a towel in the cabinet to catch residual water.
If you cannot shut off the water safely, do not begin disassembly. Have the shut-off valve repaired or arrange for a plumber to isolate the supply.
Step 2: Remove the Handle Carefully
Handle designs differ, so consult the product manual if available. Many faucets use a small decorative cap that conceals a screw; others use a set screw on the side or rear of the handle.
- Look for the handle's screw cover or set screw.
- If there is a decorative cap, lift it gently with a suitable tool, taking care not to scratch the finish.
- Use the correct screwdriver or hex key to loosen the fastener.
- Lift the handle away without twisting or levering against the faucet body.
If the handle is stuck, stop and check the manufacturer's removal instructions. Excessive force can damage the handle or finish.
Step 3: Inspect the Cartridge or Valve Assembly
With the handle removed, you may be able to see a retaining nut, clip, or cartridge cover. The exact arrangement depends on the faucet design. Take a photo before removing anything so you can remember the order and orientation of the parts.
- Remove the retaining hardware using the method specified for your model.
- Lift out the cartridge or valve only after confirming how it is secured.
- Look for cracks, damaged seals, mineral buildup, or signs that the component is worn.
- Compare the old part with the approved replacement, including its length, tabs, openings, and orientation.
If the faucet drips from the spout while fully closed, a worn cartridge or valve seal may be responsible. Replacing the correct cartridge often addresses this type of leak, but the symptom alone does not prove which part has failed.
Do not sand, reshape, or force internal components into place. If the valve seat or faucet body is damaged, replacing the cartridge alone may not solve the problem.
Step 4: Check O-Rings, Washers, and Other Seals
Some leaks come from seals around a moving spout, handle, or connection rather than from the cartridge itself. If the model's service instructions allow access to these seals, inspect them for flattening, cracking, tearing, or other visible damage.
- Remove only the parts required to reach the seal identified in the service instructions.
- Note the position and orientation of each seal before removing it.
- Replace damaged seals with parts of the correct size and material for the faucet.
- Clean accessible surfaces gently and keep debris out of the valve opening.
Not every faucet uses the same washer or O-ring arrangement. Modern cartridge faucets, compression faucets, and pull-down models can have different internal designs, so do not assume that a repair method for one type applies to another.
Step 5: Check Hoses and Connections Beneath the Sink
If the leak appears inside the cabinet, the handle cartridge may not be the cause. With the water shut off, inspect the supply lines, pull-down hose, and visible connections for splits, corrosion, damaged seals, or signs of water tracking from a higher point.
After identifying the source, check the installation instructions for the correct way to secure that connection. Tighten only as specified; overtightening can damage fittings or seals. If a hose is cracked or leaking through its body, replace it with a compatible hose rather than trying to seal the damaged section.
When Should You Use Plumber's Tape?
Plumber's tape, also called PTFE tape, is not a universal fix for a leaking faucet. It is intended for compatible threaded connections where the fitting manufacturer specifies a thread sealant. Many faucet connections seal with a washer, O-ring, gasket, or compression fitting instead; wrapping those threads with tape may not stop the leak and can interfere with the connection.
Check the fitting type and manufacturer's instructions before applying any sealant. If you cannot identify the connection, avoid adding tape as a guess.
Step 6: Reassemble the Faucet
- Make sure the replacement cartridge or seals are correctly seated and oriented.
- Reinstall the retaining clip, nut, or other hardware in the order specified by the manufacturer.
- Return the handle to its original position and secure its fastener without overtightening.
- Remove tools and loose parts from the sink and cabinet before restoring the water.
If a component does not sit flush or the handle no longer moves normally, stop and recheck the part orientation. Do not use extra force to make mismatched parts fit.
Step 7: Restore Water and Test for Leaks
- Close the faucet handle.
- Open the shut-off valves slowly. If a valve begins leaking or will not operate normally, close it again and seek help.
- Check the supply connections and cabinet area for moisture.
- Run both hot and cold water, if available, and test the handle through its normal range.
- Turn the faucet off and watch the spout for continued dripping.
- For pull-down models, extend and return the spray head gently while checking the hose and its connections.
- Dry the cabinet and inspect it again after a short period to see whether any moisture returns.
Repair complete? Confirm these points
- No water drips from the spout after the faucet is shut off.
- No moisture appears around the handle or faucet base during use.
- Supply lines and hose connections remain dry.
- The handle and spray head move normally.
- Water flow is steady and the faucet operates as expected.
When to Call a Plumber
A DIY repair may not be the right choice if the shut-off valves are seized, the plumbing connections are badly corroded, the faucet body is cracked, or a leak continues after the correct replacement part has been installed. Persistent water beneath the sink can also damage cabinets and flooring, so do not leave an unresolved leak in service.
If the source of the leak remains unclear, take photos of the wet area and the faucet model information before contacting a plumber. That information can help narrow down the problem without repeated disassembly.
Frequently Asked Questions
Why does my kitchen faucet drip when it is turned off?
A worn cartridge, valve, or internal seal can prevent the water from shutting off completely. First confirm that the handle is fully closed. If dripping continues, identify the faucet model and follow its service instructions to inspect the relevant valve components.
Why is water leaking around the faucet handle?
The cause may be a damaged seal, a worn cartridge, a loose component, or water running down from another part of the faucet. Dry the area and observe where the water first appears before removing the handle.
Will plumber's tape fix a leaking faucet?
Only if the leak is at a compatible threaded connection that calls for thread sealant. Many faucet fittings rely on O-rings, washers, or compression seals, where tape is not the correct repair. Identify the connection before applying it.
Should I replace the cartridge or the whole faucet?
If the faucet body is in good condition and a compatible cartridge is available, replacing the cartridge may be sufficient. A cracked body, extensive corrosion, unavailable parts, or repeated leaks may make replacement more practical. Compare the actual repair options for your model.
What if the faucet still leaks after I replace a part?
Recheck the leak location, part compatibility, orientation, and seal condition. The original diagnosis may have been incomplete, or more than one component may be affected. If the source is still unclear, shut off the water and consult a qualified plumber.
Final Advice
The most reliable way to repair a leaking kitchen faucet is to locate the source first, shut off the water, and replace only the component that the faucet's design and symptoms point to. Use model-compatible parts, follow the manufacturer's instructions, and test every connection before returning the faucet to normal use.
If the faucet is beyond a straightforward repair, browse the RBROHANT kitchen faucet collection to compare available styles and specifications.
