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    igfan123's Avatar
    igfan123 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Sep 4, 2007, 04:56 AM
    Floor drain conversion to sink drain
    I have a 4" floor drain in a concrete slab. What's the easiest way to convert it for use as a sink drain? Does the sink need a trap since the floor drain has one? Thanks, Matt
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Sep 4, 2007, 07:33 AM
    Before you consider doing this connect you need to confirm that the 4" drain actually goes out to your sewer and not a sump pump. Are you on city sewer or septic?
    igfan123's Avatar
    igfan123 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Sep 4, 2007, 12:35 PM
    Hi... I'm on a city sewer system and I have verified the drain connects to the sewer system. Thanks!
    XLmasterplumber's Avatar
    XLmasterplumber Posts: 1, Reputation: 1
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    #4

    Apr 23, 2012, 02:41 PM
    There is no way to convert it to a sink drain it is a floor drain and that is all. If you want a laundry or sink drain you have to run a new drain from below grade or from a adjacent stack assuming it is sized properly. In both cases a separate vent is required.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #5

    Apr 23, 2012, 03:17 PM
    XLMP makes a very good point, (Welcome to The Plumbing Page at AMHD.) There's only one way you can do this without tearing up the slab and wall for the plumbing and run a vent out the roof and that is if you install the sink directly over the floor drain and use it as a indirect waste. And even then I don't know if it will pass code. Good luck, Tom
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