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    LRKM123's Avatar
    LRKM123 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 10, 2009, 10:10 PM
    Plumbing Fixtures
    What is the maximum amount of water closets allowen on a 3" horizontal drain?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Mar 11, 2009, 04:23 AM
    Quote Originally Posted by LRKM123 View Post
    What is the maximum amount of water closets allowen on a 3" horizontal drain?
    My code book will allow two water closets on a three inch horizontal branch. Why do you ask? Hope this helps and thank you for rating my answer. Tom
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #3

    Mar 11, 2009, 08:24 AM

    Tom gave you correct answer. If you are having more than 2 toilets than you will have to upgrade to 4".
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #4

    Mar 11, 2009, 01:27 PM
    Hi Guys...

    In my area you can have up to and including 3 toilets on a horizontal drain line... ;) I am under the Massachusetts uniform state plumbing code.

    What area are you from LRKM123..?

    MARK
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