Moen 3330 / 3320 valve instructions

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by teah2006, Mar 14, 2012.

  1. teah2006

    teah2006 New Member

    Messages:
    4
    Location:
    TX
    I have the moen 3330 valve and the plaster plate was not set flush with my marble shower surround. My problem is the installers of marble surround threw away my plaster plate and I have no sure way of knowing the correct placement of valve. I need to know if someone can give some help. I have called moen and they are unable to give me any help. I tried to order face plate but they told me it would at least two weeks before they had any and I really need to get valve set before then if possible. I would appreciate it if someone could give some dimensions or other suggestions.

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    Last edited by a moderator: Mar 14, 2012
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,111
    Location:
    Bothell, Washington
    There is some allowance in the valve. I would try installing your trim and see if it works as is.

    [​IMG]

    Parts breakdown

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    This picture says thin wall but it gives you an idea of what is projecting from the finish wall too.

    [​IMG]

    The upper diverter
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    One way would be to install all the trim. Then if you know the composition of the finished wall..., e.g. 1/2 cement board, 1/4" tile, 1/16" mortar...that will take you back to the plane the valve should be mounted at. The plaster ground probably allows 5/8" wiggle room, but we do hear complaints from people if the valve is mounted too far out...they say the handles look funny. Too far IN, the handles will stick
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,812
    Location:
    Cave Creek, Arizona
    I think you have confused me. IF the marble is already set, then the valve's position should be fixed, and all you have to do is install the trim pieces. In fact, at this point, that may be ALL you can do. If the plaster ground was not flush with the marble, then it could be too shallow or too deep for your trim. If it is too shallow, you are out of luck, if it is too deep, you can get a 1" extension kit.
  5. teah2006

    teah2006 New Member

    Messages:
    4
    Location:
    TX
    moen 3330 valve

    sorry I confused you. i have access from closet. If I had my plaster plate I could unsolder the valve and reposition the valve. my problem is that the company installing marble threw the plaster plate away. I didn't realize until it was too late. I thought maybe some one may be able to give advise on how to reposition the valve without the plaster plate.
  6. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,249
    Location:
    Land of Cheese
    Even with the plaster guard, it might not be where you want it. The distance the knobs stick out is much a matter of aesthetics and everyone has a different opinion as to how much is too much.

    If you REALLY want the plaster guard, go buy another valve and then return it when you are done.
  7. teah2006

    teah2006 New Member

    Messages:
    4
    Location:
    TX
    thank you I may try the aesthetics and then if still not satisfied your idea on buying another valve and then returning the valve is a idea that i've never considered. I'll let you know how things work out. I'm open for any new ideas. Moen
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,812
    Location:
    Cave Creek, Arizona
    I am working on a job where another company installed the Moen valves then tossed the plaster guards. At that point they were useless anyway, except to make sure the tile company made the holes large enough. When I got there, it looked like they were installed too deep, so I tried the trim on the valves to see if they would fit. Most of them did, but one is marginal so I won't know if I will need an extension until the tile is finished. Install the trim and see if there is a problem.
  9. teah2006

    teah2006 New Member

    Messages:
    4
    Location:
    TX
    I tried installing the trim and that's when I started looking at the way valve was installed. I couldn't fine trim plate and I called the company who installed marble. I talked to the installer and he informed me he had thrown it away at their shop. The garbage had been picked up the Friday afternoon they finished installation.
  10. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,128
    Location:
    New England
    Unless you have a thinwall installation, once the valve's position is set, there's no reason to keep the plaster guard.

    As already said...if the trim will fit and tighten up, it should be okay (but you may not like the way it looks). If it sits too far into the wall, then you either need to move it forward or buy the extension kit (if one is available for that valve).
  11. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,812
    Location:
    Cave Creek, Arizona
    quote; I couldn't fine trim plate and I called the company who installed marble. I talked to the installer and he informed me he had thrown it away at their shop.

    The trim plate is the chrome ring. If he threw it away he needs to get you a new one because it is part of the valve and you cannot finish it without the ring. You say you "tried installing the trim". What happened then? Did it, or did it not, fit. If not then I hope it is too deep in the wall so the installer can GIVE you the necessary extensions. If it is too shallow then the valve has to be moved. So far you have NOT told us anything about how the trim fits or if you have it all, so we cannot tell you what, if anything, you have to do.
    Last edited: Mar 31, 2012
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