What a faucet cartridge does
A cartridge is the plug inside a single-handle or two-handle faucet that controls flow and, on mixers, temperature. When it wears out, the faucet drips from the spout, the handle gets stiff or loose, or hot and cold mix wrongly. Replacing the cartridge is usually the fix, and it costs far less than a new faucet.
Most cartridges are brass or plastic cylinders with rubber seals that wear and harden over time. Some are ceramic discs. The right replacement depends on the brand and model, so the old part is matched, not guessed.
Signs the cartridge is the problem
| What you see | Likely cause | Is it a cartridge? |
|---|---|---|
| Drip from the spout when off | Worn seals or a scored cartridge | Usually yes |
| Handle is stiff or gritty | Mineral buildup or worn parts | Often yes |
| Water only hot or only cold | Stuck or broken cartridge | Likely yes |
| Leak at the base of the handle | Worn O-rings around the stem | Sometimes |
| Weak flow from the spout | Clogged aerator or supply stop | Check these first |
| Drip from beneath the sink | Supply line or valve | No |
Before you spend money, rule out the cheap suspects. A clogged aerator, a half-closed stop valve or a loose handle screw can mimic a bad cartridge. If those are fine and the symptom matches the first rows above, a cartridge is the likely answer.
How the repair goes
- 1
Shut the water
We close the stop valves under the sink or the main, then open the faucet to release pressure.
- 2
Remove the handle and trim
The cap, screw and handle come off to expose the retaining nut or clip.
- 3
Pull the cartridge
We note its orientation and pull it out. A puller tool helps with stuck brass cartridges.
- 4
Match and fit the new one
We install a matching cartridge with fresh O-rings and grease, reassemble, and run the water to check.
The whole job often takes under an hour. Seized cartridges, corroded valve bodies and discontinued models take longer, and sometimes the honest answer is that the faucet itself should be replaced.
Repair or replace the faucet
Repair with a new cartridge
- Faucet body is sound and not corroded
- Replacement cartridge is still available
- Finish and style are ones you like
- Quickest and least expensive route
Replace the faucet
- Body is pitted or cracked
- No matching cartridge can be found
- You want a new look or features
- Fittings under the sink also need work
Before the plumber arrives
A dripping faucet is not an emergency, but a leak under the sink can be.
- Close the stop valve under the sink if water is pooling.
- Put a towel or tray under the drip and empty it.
- Do not force a stiff handle, which can snap the stem.
- Keep the old handle parts in a bag if you removed them.
- Note the brand name on the faucet or under the sink.
Why drips matter more than they look
A faucet dripping once a second wastes thousands of drops a day, and that shows on the bill over a month. A slow drip also stains the basin and, in a bathroom, wears on the drain and the finish. Fixing it early is cheaper than waiting for the handle to fail completely.
Our faucet repair visits cover cartridges, aerators, stems and supply lines in the kitchen, bath and laundry. If the sink has other issues, a plumbing installation visit can swap supply lines or add a new faucet at the same time.
Royal Palm Beach note: aerators and tap water
Palm Beach County Water Utilities, which serves the Village at (561) 740-4600, advises that lead in tap water usually traces to household plumbing rather than the utility's lines, and that no lead service lines were found in its service area. It suggests flushing the tap, cleaning aerators and testing water after plumbing work.
That advice fits a cartridge job. After a repair, run the cold tap for a minute and clean the aerator screen, since debris loosened during the work often collects there. For hardness, ask the utility directly because the figures were not in the reports we read.
Source type: county utility water quality guidance and its annual water quality report
Faucets in nearby areas
Homes on private wells, as in The Acreage, often see sediment that clogs aerators and wears cartridges faster. If you have a well, mention it on the call so we bring the right parts. Residents of Wellington get the same fix and the same questions about brand and age.
Call the 24/7 line and a licensed plumber will match the cartridge.
Cartridge jobs vary less than most repairs, but they still vary.
Brand and model
Some cartridges are common and cheap. Others are specialty parts.
Condition of the valve body
Mineral buildup or corrosion can stick the old cartridge and add time.
Number of faucets
Fixing two or three in one visit usually spreads the trip.
Supply stops and lines
Old stops that will not close may need replacement first.
Insurance rarely covers a worn cartridge. Call the 24/7 line for a clear price before work starts.
Sources and standards
Fixtures and shutoff valves are installed to the Florida Building Code, Plumbing, 8th Edition (2023). According to Palm Beach County Water Utilities, lead in tap water typically traces to plumbing materials, so flushing the tap and cleaning aerators after repairs is recommended.
Faucet cartridge questions in Royal Palm Beach
Can I replace a faucet cartridge myself?
Many people can, if the water shuts off fully and the brand is clear. Stuck cartridges, round stems and unknown models are the places where a plumber saves time.
How do I know which cartridge I need?
Take out the old one and match its shape, length and brand. If the model is unknown, a plumber can often identify it from the handle and spout.
Why does my faucet drip even after a new cartridge?
The valve seat may be scored, or the cartridge may not be seated fully. A bad seat usually points to replacing the faucet.
Is a dripping faucet an emergency?
Usually not. A drip under the sink or a handle that will not shut off is more urgent, so close the stop valve and call.
Should I clean the aerator after the repair?
Yes. Run the tap and unscrew the aerator to rinse out debris. Palm Beach County Water Utilities suggests cleaning aerators and flushing the tap after plumbing work.
Question not answered here? Call the 24/7 line at (561) 448-8545 and talk to a plumber.