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Thread: I hope this is a dumb question...

  1. #1
    DIY Junior Member crosby1's Avatar
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    Default I hope this is a dumb question...Moen 3330 Valve

    i'm ready to plumb a new shower using the Moen 3330 valve.

    the valve instructions are horrendous, stating that the plasterguard must be "flush with the finished wall"...well now, exactly how does one do that if the finished wall hasn't been finished yet??? and if the finished wall has been finished, how the heck would one install the valve???

    do i need to do a complete mock-up of the finished wall before installing this valve? 1/2" drywall -> thinset -> kerdi membrane ->thinset -> tile?

    does anyone have any experience installing this valve and maybe can give a few hints??

    thanks very much.

    pietre.
    Last edited by crosby1; 02-04-2008 at 04:27 PM.

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Moen 3330 Rough-in valve
    Rough-in Moentrol pressure balancing volume control with built-in three function transfer valve with stops-M-PACT common valve system-2 discrete functions, 1 shared function-adjustable temperature limit stop
    Not recommended for tub spout application

    Finish wall is determined by thickness of backer board, and tile.

    http://www.moen.com/shared/pdf/3320sp.pdf

    http://www.moen.com/shared/pdf/instr...ts/INS282A.pdf

    Last edited by Terry; 03-14-2012 at 10:17 PM.

  3. #3
    Plumber patrick88's Avatar
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    Quote Originally Posted by crosby1 View Post
    i'm ready to plumb a new shower using the Moen 3330 valve.

    the valve instructions are horrendous, stating that the plasterguard must be "flush with the finished wall"...well now, exactly how does one do that if the finished wall hasn't been finished yet??? and if the finished wall has been finished, how the heck would one install the valve???

    do i need to do a complete mock-up of the finished wall before installing this valve? 1/2" drywall -> thinset -> kerdi membrane ->thinset -> tile?

    does anyone have any experience installing this valve and maybe can give a few hints??

    thanks very much.

    pietre.
    You need to know how thick the wall will be when it is done. That is how thick the sheet rock tiles etc... It doesn't need to be perfect. You have room to play with the valve.
    I'm just starting to work with an old friend of mine to bring solar electric and hot water systems, wind turbines, Flex Fuel Boilers, batteries, hydroponic gardening, books, pellet grills and more. Also the parts for DIY installation.

  4. #4
    DIY Junior Member crosby1's Avatar
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    thanks patrick. how "not perfect" does it have to be?

    1/2" drywall, thinset, kerdi, thinset, 3/8" tile...about how thick would you think this is? about an inch more or less?

    pietre.

    p.s. terry, thanks also. those are the same instructions that moen packs with the valve. this is what's got me confused enough to post here...
    Last edited by crosby1; 02-04-2008 at 04:52 PM.

  5. #5
    Master Plumber Redwood's Avatar
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    Quote Originally Posted by crosby1 View Post
    1/2" drywall, thinset, kerdi, thinset, 3/8" tile...about how thick would you think this is? about an inch more or less?
    I don't know I'm a plumber not a tile guy!

  6. #6
    Geologist sjsmithjr's Avatar
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    Two layers of thinset plus the Kerdi plus the tile should add up to about a 1/2".

    You can contact tech support at www.schluter.com

    -Sam

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