The Moen site says the part number for my faucet is 40002. Is this the same part?

It looks the same as the 4000 but is for an older discontinued faucet. It maybe a good part. Go for it. The other choice is to replace the faucet. I may buy one to see if it fits mine.

Will this fit to my Moen single handle filtering faucet model F87420?

There are 2 cartridges that fit into the Moen single handle. If your cartridge has a large square end this 4000 unit will work.

Can the red 3 o-ring washer be removed? Id like to use the oring from this and put on my old cartridge b/c its leaking (and I cant find replacement)

Yes, you can reuse the O-ring for the same model cartridge. The O-ring may be different, if the cartridge model is not the same. If the leak is from the O-ring greasing it will help. I find that the leaks are often in the internal ceramic pieces. They must wear out from usage and mineral deposits.

I have an older moen faucet called the Whitmore. The current cartridge threads in and has the thick square top. I dont see any threads on this part?

Hello and thank you for your interest in Moen products. The Moen Whitmore faucet requires cartridge number 1255, which is held in place by a black nylon threaded nut that is included with the cartridge. Moen faucets that use the 4000 cartridge are held in place by a brass nut, which can be reused and is not included with the cartridge. Please contact our Consumer Services Center for warranty assistance; they can be reached at 800-289-6636. Our current business hours are Monday through Friday from 8:00 am - 7:00 pm (EST).

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Moen Single-Handle Replacement Ceramic Cartridge, 4000

Product ID: 29718077

Details

Brand
Moen
Color
Blue
Material
Plastic
Product Dimensions
1.93"L x 2.6"W
Style
Replacement

🔧Precision OEM fit

⚙️Durable zinc alloy build

🛠️Hassle-free installation

HK$134

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade your faucet game with Moen’s precision replacement cartridge!

SAVE TIME MONEY - Fix your faucet without replacing the entire fixture—smart, sustainable plumbing solution.
EFFORTLESS DIY UPGRADE - Designed for quick, tool-friendly installation—get your faucet flowing flawlessly in minutes.
AUTHENTIC MOEN OEM QUALITY - Guaranteed perfect fit for your single-handle kitchen faucet—no guesswork, no compromises.
BACKED BY MOENS WARRANTY - Enjoy peace of mind with a 1-year limited warranty from a trusted industry leader.
BUILT TO LAST WITH ZINC ALLOY - Robust materials ensure long-lasting performance and resistance to wear.

The Moen 4000 Single Handle Replacement Cartridge is an authentic OEM part designed specifically for single-handle kitchen faucets. Crafted from durable zinc alloy and plastic, it ensures a perfect fit and long-lasting performance. Easy to install without professional help, this cartridge offers a cost-effective solution to repair problematic faucets. Backed by Moen’s 1-year limited warranty, it guarantees reliability and peace of mind for your plumbing needs.

Specifications

ASIN	B0031Q8J9Y
Additional Features	Easy to Install
Best Sellers Rank	#65,219 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #63 in Kitchen Sink Faucet Replacement Parts
Brand Name	Moen
Color	Blue
Customer Package Type	1
Customer Reviews	4.6 4.6 out of 5 stars (1,228)
Exterior Finish	Chrome
Finish Types	Unfinished
Global Trade Identification Number	00026508183205
Hand Orientation	Ambidextrous
Handle Attachment Mechanism	screw
Handle Compatibility	Brand Specific, Model Specific
Handle Material	Aluminum
Handle Type	Lever
Included Components	Replacement Parts or Service Kit
Indoor Outdoor Usage	Indoor
Item Depth	1.75 inches
Item Dimensions L x W	1.93"L x 2.6"W
Item Type Name	Single Handle Replacement Cartridge
Item Weight	1.92 ounces
Manufacturer	Moen Incorporated
Manufacturer Part Number	4000
Manufacturer Warranty Description	1 Year Limited
Material Type	Plastic
Metal Type	Zinc Alloy
Model Number	4000
Number of Items	1
Shape	Triangular
Specific Uses For Product	Inside
Style Name	Replacement Part
Theme	Plumbing" or "Hardware
UPC	026508183205
Unit Count	1 Count

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