Replace the Cartridge or the Whole Faucet?
Most dripping, stiff or leaking faucets and showers need a new cartridge, not a new faucet. When a cartridge or rebuild kit is the right repair, when the faucet really is done, and why discontinued rarely means unavailable.
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Short answer. Replace the cartridge if the faucet body, spout and finish are sound. The cartridge is the wearing part, and a new one fixes most drips, stiff handles and shower temperature problems. On older multi-handle valves, a rebuild kit replaces all the working parts at once. Replace the whole faucet only when the body is cracked or corroded, the finish is failing, or nothing is made for it. On a shower, a cartridge swap avoids opening the wall.
The decision, by what you see
| What you see | Cartridge or faucet? | Why |
|---|---|---|
| Drip from the spout with the handle off | Cartridge, washer, or seats and springs | The sealing part has worn |
| Stiff or grinding handle | Cartridge | Scale or worn seals inside it |
| Shower runs cold or swings temperature | Cartridge | Worn or stuck balancing parts |
| Leak at the handle while running | Cartridge, or packing on an older stem | Worn stem seals |
| Leak at the base of a swiveling spout | Spout O-rings | Not the cartridge |
| Old two or three handle valve, several problems | Rebuild kit | Replaces stems and more in one go |
| Cracked body, corrosion, flaking finish | Faucet | The body itself has failed |
| Shower valve body cracked behind the wall | Valve replacement | Not a cartridge repair |
Why the cartridge is usually the answer
Faucets are designed so the part that wears comes out through the top while everything else stays put. A new cartridge returns the faucet to working order without disconnecting supply lines, working under the sink, or matching new holes in the countertop. On a shower, a new valve body means opening the wall. A cartridge does not.
When a rebuild kit makes more sense
Older two and three handle faucets and showers often have more than one worn part at once: both stems, the seats, a diverter, tired handles. A rebuild kit replaces those together. The valve body and the pipes stay as they are, and the side that has not failed yet gets fixed in the same visit. Browse rebuild kits if you know the valve, or send a photo if you do not.
When the faucet really is done
- The body is cracked or corroded around the valve or supply connections.
- The finish is failing and the owner wants a new look anyway.
- Nothing is made for it. Rarer than it seems. Discontinued usually means the faucet is no longer sold, not that its cartridge disappeared.
The real obstacle is knowing which cartridge it is
The most common reason a working faucet gets replaced is that nobody could identify the cartridge. Older faucets, builder-grade faucets, and faucets whose trim was swapped often have no readable brand or model number. Cartridges that look alike can differ in spline count, length, diameter, and which way they turn off, so matching by eye produces a part that almost fits.
That is the problem we solve. Photograph the cartridge, or the handle and trim if it is still in, and a specialist identifies the replacement. If you can measure it, the CID Finder narrows it by length, spline count and stem shape. If you already know the part, browse replacement cartridges directly.
For pros on a service call
The cartridge repair is often the better job for the customer and the faster one for the truck, as long as the right part is on hand. Plumbers use CartridgeID to identify the part from a phone photo at the jobsite and have the aftermarket replacement shipped direct to the jobsite or shop. See for plumbers.
Related guides
- Why is my faucet dripping?
- Why is my shower dripping after I turn it off?
- Faucet handle hard to turn
- Shower not getting hot
Common questions
Is it better to replace a faucet cartridge or the whole faucet?
If the faucet body, spout and finish are in good shape, replace the cartridge. It is the part designed to wear, and a new one fixes most drips, stiff handles and shower temperature problems. Replace the faucet when the body is cracked or corroded, the finish is failing, or no replacement part exists.
How long does a faucet cartridge last?
It depends on water quality and use. Hard water and sediment wear cartridges out sooner. A cartridge that drips or gets stiff has reached the end, whatever its age.
What if my faucet is old or discontinued?
Discontinued usually means the faucet is no longer sold, not that its cartridge disappeared. Many older cartridges are still made by the original brand or as aftermarket equivalents. The hard part is identifying which one you have.
Does replacing a shower cartridge mean opening the wall?
No. The shower cartridge comes out through the front after the handle and trim plate are removed. Opening the wall is only needed when the valve body itself has to be replaced.
What is a rebuild kit?
A kit that replaces the working parts of a two or three handle faucet or shower at once: typically the stems, and depending on the kit, seats, handles and escutcheons. It refreshes an old valve without touching the pipes. Kits labeled as trim only include just the handles and plates.
Should I replace both sides of a two-handle faucet?
If one side has worn out, the other has had the same water and the same years. Many pros replace both while the faucet is apart. Check whether the two sides take mirror image parts that close in opposite directions.