The shower is leaking in our bathroom and I know we need a new cartridge but the problem is that we can’t identify the brand. The only marks are a K41 on the green water pressure balance unit and a “M” on the cartridge (or what I would think is the cartridge). We’re just stuck and now sure how to proceed. enter image description here
The Moen website helps with: "How to identify which cartridge your Moen one, two or three handle bathroom tub and/or shower uses by handle operation and color images of the various cartridges."
"Still Not Finding What You're Looking For?
Contact Us or Call 1-800-BUY-MOEN
Non US? Moen Canada | Other International Sites"