Check-valve for Moen 2400 valve

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by qudrcps, Jun 26, 2021.

  1. qudrcps

    qudrcps New Member

    Joined:
    Jun 26, 2021
    Location:
    Maine
    I have a circa 1970-71 condo with a Moen Bath-Sh0wer valve with a built in diverter. I assume this is the 2400 series. Being 50 years old, I'm not sure when the cartridge was last replaced, and the spool if ever.

    In cleaning this up, I did put in a new diverter (amazing what it is supposed to do if not stuck), and considered replacing the cartridge and spool as well. The problem, of course, is shutting off the hot and cold water - something that was not required for the diverter.

    With some effort, I was able to unfreeze the hot water stop check valve entirely. This required multiple turns to the right, after which the water did turn off. The cold however, although there were multiple turns, did not turn off. I do understand that are some check/shutoff valves that only take a 90 degree turn; these clearly are not that variety.

    My questions are:
    1. Have I just not turned the screw enough times (and there is some residual crud left)? (And how many turns is it supposed to take?) (After getting the valves open and closed, at least part way, I was quite surprised at the amount of white, gray and black particulate matter got flushed out...)
    2. What is the part number for this of a check/shutoff valve of this vintage? (Is this a 12318?)
    3. Am I looking at needing to replace the check/shut-off valve (which mean turning of the water to my entire condo stack).

    Obviously, I'm not going to attempt a cartridge/spool swap if there is any chance the cold shutoff is "marginal".

    Thanks in advance for thoughts.
     
  2. WorthFlorida

    WorthFlorida The wife is still training me.

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    Oct 28, 2009
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    Retired
    Location:
    Orlando, Florida
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  4. James Henry

    James Henry In the Trades

    Joined:
    Jul 23, 2019
    Occupation:
    Plumber
    Location:
    Billings, Montana.
    It sounds like it may be stripped, not unusual if the threads are fine. I would plan on replacing the stops, if you can, and I wouldn't monkey with it until you can turn the water off to the building and have the repair parts in your hand. I have had stripped shut off screws blow out in my hand, doesn't happen often but it happened to me.
     
    Last edited: Jun 26, 2021
  5. qudrcps

    qudrcps New Member

    Joined:
    Jun 26, 2021
    Location:
    Maine
    After taking a break for another project, went back to this. The second time around, I got further in the turns. Both were 2¼ clockwise and both completely shut off - felt like metal to metal contact. The old cartridge was a 1225. I gently used a stainless pot scrubber on my little finger to remove what deposits were there and replaced with a thinly silicon greased 1200. Almost feels like new - not bad for 50 years.

    The spool is next weekend. Used a little vinegar to start dissolving the calcium/copper salts.
     
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