You’re about to learn how to fix a very common problem, a Moen kitchen faucet that is leaking. Whether the faucet is leaking at the handle or just not shutting off the solution is the same, replace the cartridge. As a bonus, this also works with many bathroom faucets too.
Moen faucets use a “cartridge” instead of “old fashioned” washers. This means that all the “working parts” are rolled into one simple cartridge. So if the faucet won’t shut off, or is leaking around the handle, the first thing to check is the cartridge. That is the most common type of Moen kitchen faucet repair.
There are a couple of things you want to do when replacing a cartridge.
First, make sure the water is turned off to the faucet. You can usually turn the water off right under the sink in the cabinet. After you’ve turned the valves off just try the faucet to make sure it’s off, otherwise you might find yourself in a scene from a sitcom…with water hitting the ceiling.
Then just start taking the handle off, paying attention to how everything is put together. When you get everything removed down to the cartridge, remove the little horseshoe shaped clip and pull the cartridge out. You may have to use a little force if it has any age on it. Actually, all new cartridges come with a little plastic tool that can help remove the old one. Just use the tool to spin the cartridge in the brass valve body so it will be easier to pull out.