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    mikect05's Avatar
    mikect05 Posts: 48, Reputation: 1
    Junior Member
    		  
    #1

    Mar 7, 2010, 04:01 PM
    Do I need to upgrade my 3" main drain to 4"?
    Hi,
    I am putting in a new bathroom and am wondering if my 3" main drain can handle the extra fixtures
    Before the bathroom this is everything that drains to main....
    -Toilet
    -Lav
    -Bathtub/Shower
    -kitchen Sink
    -Dishwasher
    -Washmachine
    -Laundry Sink

    What I will be adding
    -Toilet
    -Shower
    -Lav

    I just hate to put it all in and find out later I should have put in a 4" pipe, it still will be a pain in the a$$ because I have cut studs along the wall to accommodate the 3", but still better to ask this question now before walls are finished.
    Thx!
    truck 41's Avatar
    truck 41 Posts: 221, Reputation: 21
    Full Member
    		  
    #2

    Mar 7, 2010, 07:25 PM

    You can add your toilet and lav / shower, as planned. As far as size is concerned 3'' can cary the added fixtures. But check with your local building codes to make sure that this is allowed. Goodluck ---Zeke---
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