unscrew the nut under the sink and then you can turn the lever counter clockwise, sometimes there is plumbers putty that makes it hard to unscrew the lever without taking the nut under the sink off, watch this link

https://www.youtube.com/watch?v=zc7Q5666yoU

Answer from user111874 on Stack Exchange
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Hubbard Supplyhouse
hubbardsupplyhouse.com › cartridge-for-kohler-single-handle-faucets--1
Cartridge for Kohler Single-Handle Faucets - Hubbard Supplyhouse
Repair your leaky faucet with the Danco Replacement Cartridge for Kohler Single-Handle Faucets. Fixing your dripping tub/shower faucet by replacing the cartridge will save water and keep you from buying an entire new faucet. It is designed to be compatible with hot and cold water applications.
Discussions

How to replace valve cartridge on Kohler DevonshireWidespread bathroom sink faucet - Home Improvement Stack Exchange
The cold faucet is leaking, and I am trying to repair it by replacing the valve cartridge. However, for the love of god, I can't find a way to open the faucet so that I can replace the valve cartri... More on diy.stackexchange.com
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April 1, 2019
How to remove this Kohler single handle faucet cartridge?
Chanel locks. More on reddit.com
🌐 r/Plumbing
3
1
April 27, 2024
How Do I Remove This Kohler Single Handle Faucet Cartridge??
You need to remove the ring surrounding the brass part. Should be able to lift the whole spout up More on reddit.com
🌐 r/Plumbing
6
2
March 22, 2025
Kohler kitchen faucet cartridge replacement issue

Kohler sucks. They make everything harder than it should be. Fuck them. Take your free new faucet as payment for owning a faucet that’s next to impossible to service.

More on reddit.com
🌐 r/Plumbing
2
1
November 20, 2023
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Noel's Plumbing Supply
noelsplumbingsupply.com › home › kohler cartridges
Kohler Cartridges - Noel's Plumbing Supply
July 26, 2022 - Shop online or stop by our store ... to cart · Cartridges & Stems · $87.17 · Add to cart · Single Handle Faucet Plastic Ceramic Cartridges ·...
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Factory Direct Plumbing Supply
fdsupply.com › item › p099-1685
Factory Direct Plumbing Supply | Replacement for Kohler* Forte* Single Lever Cartridge | P099-1685 | Factory Direct Supply
Zurn Faucets · Flushometer Repair · Zurn Flushometers and Parts · Optical Flushometer Actuators · Hand Shower Repairs and Shower Heads · Hand Showers and Accessories · Shower Heads and Accessories · Chemicals, Putty, and Caulk · Drain Cleaners Test · Plumbing Chemicals · Online Store · Stems & CartridgesBy Length · Over 2-1/8" to 2-1/4" Replacement for Kohler* Forte* Single Lever Cartridge ·
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KOHLER
kohler.com › en › support › find-a-service-part
KOHLER Service & Replacement Parts
Find you part in the KOHLER Toilets and KOHLER Faucets Service Parts Books.
Find elsewhere
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Amazon
amazon.com › GUARANTEED-Replacement-KOHLER-1016814-Cartridge › dp › B0DC4SRH8Z
NEW GUARANTEED EXACT Replacement for KOHLER Part No. 1016814 Single Handle Faucet Cartridge - Amazon.com
Ousun 25mm Kohler K-GP1093674 Faucet Cartridge Replacement, CUPC Certified, Single Handle Faucet Valve for Plumbers Emporium A507906N Cartridge Sub Assembly, N25DW, N25D Valve Kit
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Danco
danco.com › home › shop › repair parts › faucet repair parts › cartridges › cartridge for kohler single-handle faucets
Cartridge for Kohler Single-Handle Faucets - Danco
September 14, 2023 - Repair your leaky faucet with the Danco Replacement Cartridge for Kohler Single-Handle Faucets. Fixing your dripping tub/shower faucet by replacing the cartridge will save water and keep you from buying an entire new faucet.
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Kohler Assist
assist.kohler.com › kohler assist › valves (shower & bath) › determine 1/2" or 3/4" valve cartridge size
Determine 1/2" or 3/4" Valve Cartridge Size | Valves (Shower & Bath) | Kohler Assist
Kohler has two common valve cartridges.The ½" valve cartridges are part numbers GP77005-RP and GP77006-RP. This cartridge is used in kitchen and bathroom faucets, in showering controls, and in deck-mounted valves.The ¾" valve cartridges are part numbers 1000188 and 1000187.
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Kohler Assist
assist.kohler.com › kohler assist › kitchen faucets › replace the valve in a single handle faucet
Replace the Valve in a Single Handle Faucet | Kitchen Faucets | Kohler Assist
Follow the steps in the video or the written step-by-step guide below to install a new valve in a single control faucethttps://www.youtube.com/watch?v=1h1JE0ygcIo&index=29&list=PLd2TSsbDn0gDwFr4qm4LqbEW1WOV8i41rNote: The faucet number featured below is the K-10412 Forte Kitchen Faucet.
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Reddit
reddit.com › r/plumbing › how to remove this kohler single handle faucet cartridge?
r/Plumbing on Reddit: How to remove this Kohler single handle faucet cartridge?
April 27, 2024 -

I have a replacement cartridge for this Kohler bathroom sink single handle faucet. The Kohler support line when I ordered the warranty replacement cartridge insisted that no special tools were needed to unscrew the old cartridge.

But as far as I can tell, it is held in by the metal ring to the outside of the red plastic ring. The metal ring has flat sides but I see no way of getting a grip on it without some sort of special tool.

Do I need some sort of special socket tool to unscrew this?

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Hardwarestore
hardwarestore.com › 687664-danco-10470-faucet-cartridge-brass-plastic-2-3-8-in-l-for-kohler-single-handle-kitchen-and-bathroom-faucets
Danco 10470 Faucet Cartridge, Brass/Plastic, 2-3/8 in L, For
Oops! JavaScript is disabled · To browse HardwareStore, enable JavaScript in your browser · Please ensure Javascript is enabled for purposes of website accessibility
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Grigg Industries
griggindustries.com › products › kohler-genuine-gp1093674-single-handle-faucet-cartridge-koh-gp1093674
Kohler Genuine GP1093674 Single Handle Faucet Cartridge
Kohler Genuine GP1093674 Single Handle Faucet Cartridge
Kohler Genuine GP1093674 25mm Single Handle cartridge. GP1093674, 1093674, 180418, 1232536.
Price   $23.82
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Heraldoffice
heraldoffice.com › danco-faucet-cartridge-for-kohler--1
Danco Faucet Cartridge for Kohler
Get everything your office needs, from supplies to furniture, with a team trusted for 100+ years. Built on service, value, and long-lasting relationships.
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Nicholshardware
nicholshardware.com › p › 1da57981-75d1-4a36-a549-b8168e6df0e9 › 1060912
Danco 18827B Faucet Cartridge, Plastic, 2-5/16 in L, For: Kohler Coralais Single Handle Faucets
Repair your leaky faucet with the Danco replacement cartridge for Kohler and Sterling single-handle faucets. Fixing your dripping tub/shower faucet by replacing the cartridge will save water and keep you from buying an entire new faucet. It is designed to be compatible with hot and cold water ...
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Highdeserthomecenter
highdeserthomecenter.com › brands › lasco › single lever kitchen faucet cartridge replacement for kohler and sterling models
Lasco Single Lever Kitchen Faucet Cartridge Replacement For Kohler And Sterling Models | High Desert Home Center
Single Lever Kitchen Faucet Cartridge Replacement For Kohler And Sterling Models
Overview: · This high-quality Single Lever Kitchen Faucet Cartridge is designed to fit Kohler and Sterling faucets, ensuring a perfect replacement for your worn-out or malfunctioning cartridge. Manufactured by Larsen, this cartridge is a reliable solution for restoring the functionality of your kitchen faucet, allowing for smooth operation of hot and cold water. With its durable construction, this cartridge is built to last, making it an essential component for any kitchen repair or renovation project. · Key Features: · - Compatible with Kohler and Sterling faucets · - Replaces OEM part number
Price   $44.99
Call   760-375-9741
Address   824 W Ridgecrest Blvd, 93555
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eBay
ebay.com › home & garden › home improvement › plumbing & fixtures › other home plumbing & fixtures
KOHLER 70415 FAUCET REPLACEMENT SINGLE HANDLE CARTRIDGE GP70415 VALVE REPAIR UNI | eBay
KOHLER 70415 FAUCET REPLACEMENT SINGLE HANDLE CARTRIDGE GP70415 VALVE REPAIR UNI
KOHLER 70415 FAUCET REPLACEMENT SINGLE HANDLE CARTRIDGE GP70415 VALVE REPAIR UNIKOHLER 70415 FAUCET REPLACEMENT SINGLE HANDLE CARTRIDGE GP70415 VALVE REPAIR UNI
Price   $10.99