PVC SDR35 versus PVC SCH40

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by gdavis62, May 28, 2007.

  1. gdavis62

    gdavis62 New Member

    Joined:
    May 4, 2007
    I can tell from reading specs how these two pipe types differ. My question is about usage.

    The pic shows the plan view of the underslab waste and soil drains in a house being built. The line exits the house at the bottom of the drawing, and heads for the septic tank.

    The main spine of the underslab spider is 4" at the suggestion of our plumber. Because the branch fittings are SCH40 PVC, the majority of the line under the slab needs to be SCH40 PVC.

    My question is, where can we transition from SCH40 to SDR35? We fall under the IPC, and the limited code refs I have do not clarify this for me.
     

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  2. kordts

    kordts In the Trades

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    Oct 15, 2005
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    industrial service plumbing foreman
    Location:
    exurban Chicago
    About 5 or 10 foot outside the footing.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    Pvc

    Outside the building, but, I personally, would not transition to the thin wall pipe. It can only cause problems down the road. Stay with sch. 40, even though it costs a few cents more.
     
  5. HandyAndy

    HandyAndy General Contractor, Farmer

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    Apr 17, 2007
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    General Contractor, Farmer
    Location:
    Haxtun, CO
    And sleeve it going through the foundation or wall unless it is completely under the footer,
     
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