How much can a 3 inch drain tolerate?

Discussion in 'Remodel Forum & Blog' started by mchiarit, Jul 19, 2005.

  1. mchiarit

    mchiarit New Member

    Messages:
    18
    I am doing some remodeling. I currently have two bathtubs, a shower, three toilets and three sinks draining to one three inch (3.5" O.D.) main pvc drain pipe. I plan to add a shower and a sink. Is this a problem?
  2. plumguy

    plumguy New Member

    Messages:
    192
    Location:
    MA
    Three toilets is the max on three inch. As long as you don't add another toilet you are fine.
  3. mchiarit

    mchiarit New Member

    Messages:
    18
    Another question

    Thanks plumguy.
    Just out of curiosity, what is the max permitted toilets for four and six inch drains?
  4. plumguy

    plumguy New Member

    Messages:
    192
    Location:
    MA
    Off the top of my head I think 4" you can have something like 48 toilets. I do stand to be corrected! As far as 6" I have no idea don't use it much!
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