There is probably some hard water deposits inside the valve where the cartridge O rings and seal make contact. The slightest deposit will break the seal and you'll have a drip. Get some fine emery paper and gently clean out the valve making sure it's totally smooth inside. Then get some plumber's grease, coat the cartridge and reinstall. Hopefully you didn't damage the O rings inserting the cartridge the first time.

Answer from JACK on Stack Exchange
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JustAnswer
justanswer.com โ€บ plumbing โ€บ 7bhbo-older-moen-handled-bathroom-faucet-cold-water.html
Moen 2 Handle Bathroom Faucet Repair | Expert Q&A
November 10, 2012 - JustAnswer has plumbers online and ready to give you professional answers to your Plumbing questions. Itโ€™s faster than an in-person visit and more reliable than searching the web. Try it!
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JustAnswer
justanswer.com โ€บ plumbing โ€บ nvg0k-trying-replace-moen-bathroom-sink-faucet-asked.html
Expert Solutions for Moen Bathroom Faucet Repair and Replacement
Hi, I attempted to repair a leaky faucet on my own but encountered some issues. I received a 1225 b cartridge and now I've noticed that the video I viewed on YouTube is somewhat different. When I reach step three, the large threaded collar doesn't unscrew all the way. Do I need to reach in and take out the washer? There's also a large pin that likely needs to be removed. ... I have a bathroom sink faucet that drips. It is a Moen with number 2b 102654 printed inside the single handle.
Discussions

plumbing - Moen two handle bathroom faucet - new cartridges but still drip - Home Improvement Stack Exchange
Ugh! So this is an older model Moen 91111 two-handle faucet. The hot water tap had been dripping, so I swapped out the cartridges. Basic 1224 models with the little tab that fits into the notch in ... More on diy.stackexchange.com
๐ŸŒ diy.stackexchange.com
July 18, 2020
Need to lubricate Moen faucet every 3 months! - Bogleheads.org
As I said, water is from lake Michigan, not hard water. We also have Moen faucets in the bathrooms and they do not need frequent lubrication. Maybe we use the kitchen faucet way too much, so the grease would dissipate slowly and need to be put back every so often. More on bogleheads.org
๐ŸŒ bogleheads.org
August 12, 2023
Replacing cartridge in Moen double handle bathroom sink
I think that all comes together, not quite sure if you could buy it separately More on reddit.com
๐ŸŒ r/HomeImprovement
7
1
April 27, 2022
Moen bathroom faucet handle replacement
Go under the cabinets and tighten the nut holding it in place. If it's still hard to turn after that you may need a cartridge replacement as well. More on reddit.com
๐ŸŒ r/Plumbing
22
9
September 22, 2024
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Moen Solutions
solutions.moen.com โ€บ article library
Bathroom Faucet: Dripping From The Spout - Moen Solutions
April 11, 2025 - This article will explain the most common reasons for water to drip out of the end of the spout of a bathroom faucet.
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Quora
quora.com โ€บ How-do-you-fix-a-dripping-Moen-faucet-without-damaging-the-finish-and-what-tools-do-you-really-need
How to fix a dripping Moen faucet without damaging the finish, and what tools do you really need - Quora
You can get one from home Depot or Lowe's. Take a picture what you got show it to the salesperson at the hardware store so they can match it up for you.. for those that do not know plumbing...
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Terry Love
terrylove.com โ€บ home โ€บ forums
Moen 2 handle faucet removal problem - Terry Love Plumbing
November 14, 2020 - Advice and instruction on Pumps, Tanks and Well Water systems, installation, repair and replacement.
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YouTube
youtube.com โ€บ playlist
Moen Faucet Repairs - YouTube
Step-by-step guides to fix Moen faucets, troubleshoot hot/cold water issues, low water pressure, and DIY plumbing repairs. Watch these tutorials to quickly r...
Find elsewhere
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Moen Solutions
solutions.moen.com โ€บ article library
Bathroom Faucet: Leaking Around the Base of the Faucet - Moen Solutions
April 11, 2025 - This article will explain the most common reasons for water to leak around the deck plate of a bathroom faucet.
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Moen
shop.moen.com โ€บ collections โ€บ parts
Moen Replacement Parts and Accessories
Find genuine Moen replacement parts to keep your fixtures running smoothly and efficiently. Shop now for easy repairs and long-lasting performance.
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Quora
quora.com โ€บ How-do-I-fix-a-Moen-shower-faucet
How to fix a Moen shower faucet - Quora
Answer (1 of 3): I have older Moen shower one-piece faucet/valves in my rentals. Generally, they are very good valves and last a long time. Thatโ€™s why I used them when I remodeled the rentals years ago. Iโ€™ve had to replace a few of these one-piece, cylindrical valve cores (the one-piece internal ...
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Airstream
airforums.com โ€บ airstream restoration, repair & parts forums โ€บ plumbing - systems & fixtures โ€บ sinks, showers & toilets
Repairing Moen Faucet? | Airstream Forums
April 5, 2022 - Moen faucets are very easy to repair. The post above #45 moen customer support shows exactly how to do. The cartridges are avble big box ie home depot etc they just slip in, but use grease supplied or lub. cartridge makes easy, If you cannot pull cart. out there is real cheap puller.
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Amazon
amazon.com โ€บ 1224-Replacement-Cartridge-Moen-Faucets โ€บ dp โ€บ B00002N97S
MOEN 1224 Replacement Faucet Cartridge Kit Fits Most Double Handle Moen Faucets and Tub/Showers - Amazon.com
1224 1224B Faucet Cartridge Replacement Kit For Most Double Handle Moen Faucets and Tub/Showers Repair Kit,Replacement Compatible with Moen Two Handle Faucets,4 Pack ยท Moen 97479 Monticello Widespread Bathroom Sink Faucet Replacement Stem Extension Kit
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Moen Solutions
solutions.moen.com โ€บ article library
1234 Cartridge: Two Handle 4" Centerset Bathroom Faucets - Moen Solutions
April 11, 2025 - This article will walk you through the process of replacing the internal water flow cartridge(s) in a Moen small two handle 4" spread centerset lavatory sink faucet. The 4" spread pertains โ€ฆ
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Sunnybliss
sunnybliss.com โ€บ home โ€บ emergency plumbing โ€บ how to repair a moen bathroom faucet โ€“ learn the steps!
How to Repair a Moen Bathroom Faucet - Sunny Bliss Plumbing & Air - HVAC, Air Conditioning, and Plumbing Service Near Me
December 10, 2024 - This guide focuses on How to repair a Moen bathroom faucet with a single handle that utilizes a replaceable cartridge. Identify your cartridge type: Not all Moen faucets use the same cartridge. Roman bathtub faucets require a different cartridge (124B) compared to standard bathroom sink faucets (124 or another model depending on your specific faucet). Double...
Price ย  $50
Address ย  605 Lincoln Rd Suite 250, 33139, Miami Beach
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Bogleheads.org
bogleheads.org โ€บ board index โ€บ community โ€บ personal consumer issues
Need to lubricate Moen faucet every 3 months! - Bogleheads.org
August 12, 2023 - In a true BH fashion, no need to replace the whole cartridge, just put in a tiny amount of silicone faucet grease (sold by Moen) then it'll be as good as new! Thanks for confirming that the lube in these faucets would just dissipate over time. For me it lasts maybe like 4 months at most.
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Home Repair Tutor
homerepairtutor.com โ€บ how to fix a leaky faucet
Fix a Leaky Moen Bathroom Faucet in less than 15 minutes
October 22, 2023 - With the bathroom sinkโ€™s new Moen replacement cartridge in place you can now put on the faucet handle. Again, I hand tighten this type of handle only and donโ€™t use channel locks. The result of this repair is no more water dripping from the faucet, no more waste of a precious natural resource, and no more money being added to your water bill.
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Moen
shop.moen.com โ€บ products โ€บ 1224
Moen 1224 Two-handle Replacement (hot Or Cold)
From finishes that are guaranteed to last a lifetime, to faucets that perfectly balance your water pressure, Moen sets the standard for exceptional beauty and reliable, innovative design. Bring elegance to your home with premium selections from Moen. From the sophistication of period Traditional ...
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YouTube
youtube.com โ€บ watch
Repair Leaking Moen Bathroom Faucet - YouTube
If you have a leaking Moen bathroom faucet, this video will show you how to fix it. Regardless of the brand of faucet you have whether Moen, Delta, Price Pfi...
Published ย  July 3, 2022
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MOEN
moen.com โ€บ customer-support โ€บ cartridge-replacement
Faucet Cartridge Replacement | Customer Support | MOEN
Cartridge 1234 - Two-handle Duralastยฎ cartridge for two-handle lavatory and kitchen faucets (hot or cold). Please note that your cartridge may have an imbedded cartridge nut. Refer to the documentation that came with your faucet.
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Terry Love
terrylove.com โ€บ home
Terry Love Plumbing Advice & Remodel DIY & Professional Forum
Advice and instruction on Pumps, Tanks and Well Water systems, installation, repair and replacement.