Plumbing question - will this work?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by caw1982, Apr 9, 2007.

  1. caw1982

    caw1982 New Member

    Apr 9, 2007
    I am working on roughing in the plumbing for a master bathroom and have a question about running my 3-inch PVC. I cannot run directly to my main stack because I have ductwork in the way. My only other option is to run around my basement which leaves me with a straight 20 foot run, then a 90 degree angle, followed by another 20 foot run and another 90 degree angle into my main stack. I can obtain more than ¼†per foot of slope throughout the entire run. I will be able to tie in a vent about three feet from the start of my run. Any advice or information on the possibility of this working would be great! Thanks!
  2. geniescience

    geniescience Homeowner

    Nov 27, 2005
    humid summers hot, humid winters cold
    that's a fascinating question.

    As long as you have that vent like you say you do, and you have that slope like you say you do, you may very well be fine.

    Post a diagram just in case there is something else that is not yet expressed that needs to be checked. Is this a 3" toilet run? What size vent ? Etc.

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  4. markts30

    markts30 Commercial Plumber

    Sep 25, 2006
    Commercial Plumber
    Phoenix, AZ
    ...Don't forget the cleanouts you are going to need...
    Drains not to exceed 135 deg. without a cleanout....
  5. caw1982

    caw1982 New Member

    Apr 9, 2007
    3" pipe with 1.5" vent.

    I was going to put a cleanout at every corner. Would I be better off with two 45 degree turns instead of a 90 degree?
  6. The old college try

    The old college try Engineering Technician

    Jan 31, 2007
    Engineering Technician
    I agree. 90 degree bends will plug easily as they slow down flow through the pipe.
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