Moen Faucet Cartridges

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Fatmobile, Jun 30, 2010.

  1. Fatmobile

    Fatmobile New Member

    Messages:
    2
    Location:
    Ohio
    Me and my Dad recently replaced one. I was wondering how they work. Are there any diagrams of how the water flow works. So far my understanding is that the hot and cold water come to the same point and based on which way you turn it, the water will mix to be hotter or colder. From looking at the cartridge it seemed a lot more complicated and I was wondering what all the parts do?


    Thanks, and sorry if it is too broad a question.
    I may add a picture.

    Attached Files:

    Last edited: Jun 30, 2010
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,513
    Location:
    Cave Creek, Arizona
    The cold water comes in from one side and the hot from the other. With Moen it doesn't make any difference which sides they are on. The center "spool" rotates from one side to the other. Depending on where it is positioned, the opening only flows cold water, hot water, or a varying mixture as it rotates from one side to the other.
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    You have the basic idea. In addition to the function of mixing, the cartridge has to have seals which keep water from leaking out around the cartridge stem and body. That is some of the items you pointed to in the picture.
  4. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    Pop the center stem out and you'll see how they work! Pretty simple little devices.
  5. Fatmobile

    Fatmobile New Member

    Messages:
    2
    Location:
    Ohio
    I guess I was asking what the holes in the middle of the cartridge are for. I have the general idea of how it works.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,513
    Location:
    Cave Creek, Arizona
    The holes at the bottom are where the water comes into the mixer.
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