Moen 3520 Moentrol valve 1/2"

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by billrea, Apr 10, 2010.

  1. billrea

    billrea New Member

    Jun 18, 2007
    New York
    Hello All,

    Just finished installing Moen 3520 valve(solder) for tub/shower. Turned on water supply to test. When turning shower/tub water flow control nothing is coming out of the tub pipe. If I remove moen valve cartridge, hot water comes out of valve, same for cold water. Put cartridge back in, and I get nothing. Any ideas? Valve is placed with hot on left, and cold on right. Marking on valve denoting up, is facing up.

    Thanks as always for your help. It is truly appreciated.

  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Did you have both the hot and cold on at the same time? If not, the spool valve (pressure balance) may have been jammed to one end and won't let water through.
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    From your description, you imply that you have both hot and cold water to the valve, but your symptom implies that one or the other is turned off. If something is not turned off, we may need more information, or you need a plumber to diagnose it.
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