The short answer
Most single handle faucets use a cartridge, a ball or a ceramic disc to control flow and temperature. When water drips from the spout or leaks around the handle, one of those parts, or a rubber seal around it, has worn out. You can often replace the part with a screwdriver and a hex key in under an hour.
If the faucet body is corroded, the finish is flaking, or the leak comes from the base and not the handle, the faucet may be worth replacing. This guide helps you decide, and shows the repair step by step.
Find out what kind of faucet you have
| Type | How to spot it | What usually wears out |
|---|---|---|
| Cartridge | Handle lifts and turns, a metal or plastic cartridge sits inside | The cartridge or its O-rings |
| Ball | A rounded cap under the handle, often in older kitchen faucets | Springs, seats and the ball itself |
| Ceramic disc | A wide cylinder under the handle, smooth operation | Seals on the discs |
| Compression | Two handles, not one | Washers and seats, not covered here |
Look for the brand name on the handle or underneath. A photo of the faucet helps when you buy parts.
Tools and parts
- A flathead and a Phillips screwdriver
- Hex keys for the handle set screw
- Adjustable pliers or a wrench
- A replacement cartridge or seal kit matched to your brand and model
- Plumber's grease for O-rings
- A towel and a small bowl for screws
How to repair a one handle cartridge faucet
Shut off the water
Turn the stop valves under the sink clockwise. Open the tap to drain the line.
Remove the handle
Pry off the cap, loosen the set screw and lift the handle away.
Pull the cartridge
Remove the retaining nut or clip and pull the cartridge straight up. Note its orientation.
Replace and grease
Fit the new cartridge in the same position, lightly grease the O-rings and tighten the retainer.
Reassemble and test
Put the handle on, open the stops slowly and check for drips at the spout, the handle and the base.
Quick tip
Take a photo at each step so you can put it back the same way. Keep the old cartridge and take it to the store, because a part that looks the same can differ in size by a millimeter.
Not a quick fix?
Call the 24/7 line about faucet leaking badly and we will book the next appointment that fits.
Where the leak is tells you what failed
A drip from the spout means the cartridge or seat no longer closes. Water around the base of the handle means an O-ring has worn out. Water under the sink may not be the faucet at all. It can be a supply line, a stop valve or the drain, so dry everything and watch to find where the drops start.
A faucet that is hard to turn, or that gives only a trickle, usually has mineral buildup in the cartridge or the aerator. Unscrew the aerator and soak it in vinegar, and a clean cartridge often restores the flow.
| Symptom | Likely cause | Fix |
|---|---|---|
| Drip from the spout | Worn cartridge | Replace the cartridge |
| Water at the handle base | Worn O-rings | Replace the O-rings |
| Hard to turn | Mineral buildup | Clean or replace the cartridge |
| Low flow | Clogged aerator | Soak or replace the aerator |
| Water under the sink | Supply line, stop valve or drain | Check each, replace the leaking part |
When to replace the faucet instead
Repair makes sense when the faucet is in good shape and a part has worn. Replacement makes sense when the body is pitted, the finish is peeling, parts are no longer made, or the faucet is leaking from a crack. A new single handle faucet is often easier to install than to repair, and many are sold with a cartridge that is easy to swap later.
If the shutoff valves under the sink are corroded or will not close, replace them at the same time. A valve that will not close is the reason many small leaks become floods. Our faucet repair page explains what a plumber checks, and if you suspect a larger leak, leak detection finds the source.
What a plumber charges and why it varies
We do not post a flat price for faucet work. A cartridge swap on a standard faucet is a short visit, while a designer faucet with specialty parts or a stuck stop valve takes longer. You hear a clear price before work starts, and we tell you honestly whether repair or replacement makes sense.
If the new cartridge leaks too, check that you did not nick an O-ring on the way in. Remove it, lubricate the rings, and seat it fully before you tighten the retainer. A cartridge that sits crooked leaks the same way a worn one does.
Faucets and Massillon water
Water for most Massillon addresses comes from Aqua Ohio's Massillon Division, which draws from ten wells in a sand and gravel aquifer in the Tuscarawas Valley and buys some water from North Canton. The utility's annual water quality report does not give a hardness number we can quote, so ask Aqua Ohio or test your tap.
Whatever the hardness, minerals collect in aerators and cartridges over time. If you see white crust on the spout or find that cartridges wear out quickly, a water softener or filter may help. In nearby towns, ask your own utility. In North Canton and Navarre, water arrangements differ, and we tell you what applies to your address when you call.
Replacement parts should match the maker's specifications, and a new faucet should meet the fixture standards in the Ohio Plumbing Code, OAC Chapter 4101:3.
Massillon faucet questions
Look for a brand and model number on the faucet or the box. If you cannot find one, take the old cartridge to a plumbing supply store and match it.
Yes. Close the stop valves under the sink. If there are none, close the main and replace the stops while you are at it.
A slow drip wastes thousands of gallons a year and the worn part gets worse. Fix it before it fails entirely.
It may be the wrong size, seated crookedly or missing an O-ring. Take it out, check, and reseat it.
Yes. We serve Perry Township and nearby towns. Call and we will book the next appointment.