To find the right shower stem or cartridge, first check how many handles your faucet has. One-handle faucets usually use a cartridge, while two- or three-handle faucets typically use stems. Then remove the worn part and use Danco AI PartFinder to identify a compatible replacement from a photo.

How-to-Find-the Right Shower Stem Cartridge

A leaky faucet does not always mean you need a new fixture. In many cases, replacing a worn faucet stem or cartridge can stop the drip, extend the life of your faucet, and save the cost of a full replacement.

Stem vs. Cartridge: Start With the Number of Handles

Before taking anything apart, look at the faucet or tub/shower valve and count the handles.

One-Handle Faucet: Usually a Cartridge

A faucet with one handle that controls both hot and cold water usually uses a cartridge or cartridge-style mechanism.

The cartridge sits inside the valve and controls water flow and temperature. A worn cartridge may cause dripping from the spout, leaking around the handle, or difficulty controlling the water.

one-handle-faucet-cartridge-diagram

The fix: Turn off the water, remove the handle and retaining parts, pull out the old cartridge, and install the correct replacement cartridge.

Two-Handle Faucet: Usually a Stem

A two-handle faucet has separate hot- and cold-water controls. Each handle usually has its own stem that opens and closes the water flow.

If the faucet drips, you may only need to replace the stem on the problem side—not the entire faucet.two-handle-faucet-stem-diagram

The same basic rule applies to many two- or three-handle tub and shower faucets: each handle uses a stem to control hot water, cold water, or the diverter. Identify the worn stem and replace that part.

multi-handle-tub-shower-faucet-diagram

How Do I Know Which Faucet Stem Is Bad?

  • Water leaks around one handle.

A leak from underneath or around a handle often points to the stem on that side.

  • Water drips from the faucet spout.

For a two-handle faucet, isolate the problem by shutting off one water supply at a time.

Use these steps for a typical two-handle sink faucet:

Step 1: Turn off the hot-water supply.

Step 2: If the faucet continues to drip, the cold-side stem is likely the problem.

Step 3: If the dripping stops, the hot-side stem is likely the problem.

How to Identify the Right Shower Stem or Cartridge

Finding the exact replacement part is often the hardest step. Faucet stems and cartridges come in many shapes, lengths, and configurations, so choosing by appearance alone can lead to the wrong match.

Use Danco AI PartFinder Instead of Guessing

Take a clear picture of the faucet or removed part and let Danco help identify the replacement. The process is simple:

Step 1: Snap a picture. Take a clear photo of the faucet or the part you removed.

Step 2: Find your match. Danco AI PartFinder analyzes the image and helps identify a compatible replacement.

Step 3: Get your part. Use the recommended match to find the Danco replacement part you need.

Ready to Find Your Replacement Part?

Go to Danco.com and select “Leaky Faucet – Start Now.”

Start the Danco Leaky Faucet Guide

Or scan the QR code below to get started.

danco-partfinder-qr-code

Before You Start: A Few Things to Remember

Turn off the water supply before removing the old part, then open the faucet to release any remaining water. As you disassemble the faucet, place the parts in the order you removed them and take a photo. This makes reassembly faster and easier.

How to Replace a Stem in a Two- or Three-Handle Faucet

  • Remove the handle.

remove-two-handle-faucet-handle

  • Remove the old stem.

remove-old-faucet-stem

  • Install the new stem.

install-replacement-faucet-stem

  • Reinstall the handle.

How to Replace a Cartridge in a One-Handle Faucet

  • Remove the handle.

remove-one-handle-faucet-handle

  • Remove the old cartridge.

remove-old-faucet-cartridge

  • Install the new cartridge.

install-replacement-faucet-cartridge

  • Reinstall the handle.

Always Test the Repair

Turn the water back on slowly.

  • Slowly reopen the water supply after installing the new shower stem or faucet cartridge.
  • Check around the handle, valve, and spout for leaks.
  • Turn the faucet on and off several times.
  • Confirm that the water flows properly and the dripping has stopped.

You do not need to be a plumbing expert to fix many common faucet leaks. Replacing the worn part can restore the fixture without the cost and work of replacing the entire faucet.

Quick answer: One handle? Think cartridge. Two or three handles? Think stem. Not sure which part you need? Snap a picture and let Danco AI PartFinder help identify it.

Repair the part. Save the faucet. Save time and money.

Frequently Asked Questions

How do I know if my shower uses a stem or cartridge?

Check the number of handles. One-handle tub and shower faucets usually use a cartridge. Two- or three-handle faucets typically use separate stems for hot water, cold water, and sometimes the diverter.

Can I replace a shower stem or cartridge without replacing the faucet?

Yes. If the valve body and fixture are in good condition, replacing the worn stem or cartridge can often stop the leak and restore proper operation without replacing the entire faucet.

How can I identify an old shower stem or faucet cartridge?

Turn off the water, remove the handle and old part, and take a clear photo. Danco AI PartFinder can use the image to help identify a compatible replacement.

What are the signs of a bad shower cartridge or stem?

Common signs include dripping from the spout, leaking around a handle, difficulty turning the handle, or trouble controlling water flow or temperature.

Should I turn off the water before removing a shower stem or cartridge?

Yes. Shut off the water supply and open the faucet to release remaining pressure before disassembling the fixture.