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    niners88's Avatar
    niners88 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 26, 2009, 10:54 AM
    3" drain for toilet and shower?
    I am remodeling my guest bathroom and just decided to replace the existing cast plumbing with ABS. The existing plumbing runs (2) 4" drain pipes into a 4 x 4 x 4 x 4 double sanitary tee ((2) in, (1) cleanout and (1) out). I cannot find this fitting in ABS, would a 3" drain pipe be sufficient to run a toilet and a shower? I could then run 4 x 3 closet bends, and a 4 x 4 x 3 x 3 double sanitary tee.

    Thanks
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Sep 26, 2009, 03:54 PM

    Yes, 3" is sufficient for toilet and shower. Are toilet and shower vented?
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