You can replace a Moen kitchen faucet cartridge yourself in about 30 minutes
A Moen kitchen faucet cartridge controls water temperature and flow. When it wears out, you'll notice the handle becomes hard to move, water leaks from the spout even when the handle is off, or the faucet won't shut off completely. You don't need a plumber — the cartridge pulls straight out and a new one costs between $20 and $50 depending on your faucet model.
The job requires only a screwdriver, an Allen wrench (usually included with the replacement cartridge), and the correct cartridge for your faucet. Moen makes different cartridges for different faucet lines, so you'll need to identify your model first. Once you have the right part, the actual swap takes minutes.
Key Takeaways
- Moen cartridges are model-specific, so you must find your faucet's model number on the body or original paperwork before ordering a replacement.
- The cartridge sits inside the faucet body under the handle and cap, and you remove it by turning it counterclockwise with an Allen wrench or cartridge puller.
- You can order the exact cartridge from Moen's website, Amazon, or a hardware store once you know your model number.
- The entire job — removing the old cartridge and installing the new one — takes about 30 minutes and requires no special tools beyond what comes in the cartridge box.
Find your Moen faucet model number
Moen prints the model number on a sticker attached to the faucet body itself, usually on the underside or back near where the water lines connect. Look for a number that starts with "7" or "8" followed by four digits (like 7594 or 8437). If you can't find it on the faucet, check your original paperwork or warranty card.
Once you have the model number, go to Moen.com and search for your model in their parts section. The site will show you a diagram of your faucet with all the internal parts labeled. Look for the cartridge — it's the cylindrical piece inside the faucet body that the handle connects to. Note the cartridge part number (it usually starts with "1225" or "1255"). Write this down before you order.
If you can't find the sticker or paperwork, take a photo of your faucet and bring it to a hardware store like Home Depot or Lowe's. Staff can often identify the model by sight. Alternatively, you can call Moen's customer service at 1-800-289-6636 with a description of your faucet, and they'll tell you the model number.
Turn off the water supply and remove the handle
Before you start, shut off the water under the sink. Look for two oval knobs on the pipes below the faucet — one controls hot water, one controls cold. Turn both clockwise until they stop. Then turn on the faucet handle to release any water still in the lines. This prevents water from spraying when you open the faucet body.
Next, remove the handle. Most Moen kitchen faucets have a small set screw hidden under a decorative cap on top of the handle. Use a flathead screwdriver to gently pry off this cap — it usually pops off with light pressure. Once it's off, you'll see a small screw. Unscrew it and the handle will slide off the faucet body.
If your handle doesn't have a cap, look for a small hole on the side of the handle near where it meets the faucet body. This is where the set screw hides. Use an Allen wrench (usually 3/32 inch) to loosen it, then pull the handle straight up and off.
Remove the cartridge collar and pull out the old cartridge
Once the handle is off, you'll see a large nut or collar holding the cartridge in place. This is called the cartridge collar or bonnet nut. Use an adjustable wrench or a cartridge removal tool (a special wrench made just for this job) to turn it counterclockwise. Turn it slowly — it's usually hand-tight, not over-tightened. Once it's loose, unscrew it by hand and set it aside.
Now you can see the cartridge itself. It's a cylindrical piece about 2 inches long. Grab the top of the cartridge with your fingers and pull it straight up and out of the faucet body. It may take a little wiggling, but it should come free without force. If it's stuck, you can use a cartridge puller tool (available at hardware stores for about $10) to grip it and pull it out.
Before you throw away the old cartridge, look at the top. You'll see a small notch or flat spot. The new cartridge must be oriented the same way when you install it, so note which direction this notch faces.
Install the new cartridge and reassemble the faucet
Take the new cartridge out of its box and compare it to the old one. They should look identical. Check that the notch or flat spot on the new cartridge matches the position of the old one. If it doesn't, you may have ordered the wrong cartridge — double-check the part number against your model number.
Insert the new cartridge into the faucet body with the notch facing the same direction as the old one. Push it down firmly until it sits flush with the faucet body. You should feel it click or seat into place. Screw the cartridge collar back on by hand, then tighten it with your wrench. Turn it clockwise until it's snug — don't over-tighten, as this can damage the cartridge.
Slide the handle back onto the cartridge and insert the set screw. Tighten the screw with your screwdriver or Allen wrench until the handle is find but not forced. Pop the decorative cap back on top. Turn the water supply back on under the sink by turning both knobs counterclockwise. Test the faucet by moving the handle through hot and cold — it should move smoothly and water should shut off completely.
What to do if the new cartridge leaks or doesn't work
If water still leaks from the spout after you install the new cartridge, the cartridge may not be seated properly. Turn off the water, remove the handle and collar again, and pull the cartridge out. Look inside the faucet body for any debris or mineral buildup. Rinse the inside with clean water and reinstall the cartridge, making sure it goes in straight and sits all the way down.
If the handle is hard to move or won't turn all the way, you may have installed the cartridge backwards or rotated it during installation. The notch must face the correct direction. Remove the cartridge again and check the orientation against the diagram on Moen's website for your model. Reinstall it facing the right way.
If you ordered the wrong cartridge by mistake, most hardware stores and Moen will accept returns within 30 days. Keep your receipt and the cartridge box. Contact Moen at 1-800-289-6636 if you're unsure whether you have the right part before you install it.
Frequently Asked Questions
How do I know which Moen cartridge I need?
Find your faucet's model number on the sticker attached to the faucet body or in your paperwork. Go to Moen.com, search your model, and look at the parts diagram. The cartridge part number will be listed there. You can also call Moen at 1-800-289-6636 with your model number and they'll tell you the exact cartridge to order.
Can I use a cartridge from a different faucet brand?
No. Moen cartridges are designed specifically for Moen faucets and won't fit other brands. Using the wrong cartridge will cause leaks and won't solve the problem. Always order the cartridge that matches your Moen model number.
What if I can't get the old cartridge out?
If the cartridge is stuck, try soaking the faucet area with white vinegar for 15 minutes to dissolve mineral buildup, then try again. If it's still stuck, use a cartridge puller tool (available at hardware stores for about $10). This tool grips the cartridge and pulls it straight up without damaging the faucet body.
Do I need to turn off the water to replace the cartridge?
Yes. Always turn off the water supply under the sink before you start. This prevents water from spraying out when you remove the cartridge and makes the job much cleaner and easier.
How long does a Moen cartridge last?
Most Moen cartridges last 10 to 15 years depending on water quality and how often the faucet is used. Hard water with high mineral content can shorten the lifespan. If your cartridge fails sooner, you may have a water quality issue — consider installing a water softener or filter.