three ways to plumb a toilet in a slab

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by mcnattyp, Jul 25, 2011.

  1. mcnattyp

    mcnattyp New Member

    Messages:
    35
    Location:
    Portland Orygun
    Option 1 (the PVC is just there for discussion):

    IMG_1251.jpg

    Option 2:

    IMG_1252.jpg

    Option 3:

    IMG_1253.jpg

    Please view and discuss which one is the "best" way to plumb a toilet.

    In all cases, north of the picture is a bathroom sink, shower and washing machine. The visible parts are 3", the northward run would be bushed down to 2". Southward is a sewage pump, about three feet away in a direct line.

    Thank you folks! I love terrylove!
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,245
    Location:
    Cave Creek, Arizona
    Unless there is some reason for doing it one of those 3 ways, I would not use any of them. I would either position the Y so it angled directly to the closet bend, or use a combo to turn sideways to the bend. And I would NEVER use an internal closet flange, ESPECIALLY an all plastic one.
  3. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,048
    Location:
    Maine
    Boy does that bring back memories of a debate that raged for weeks LOL BTW, I is in your camp there.
    I'm not enamored with any of the above either but if I had to pick it would be option #2
  4. mcnattyp

    mcnattyp New Member

    Messages:
    35
    Location:
    Portland Orygun
    Son of a biscuit, that would be the most obvious solution. Option 4:

    IMG_1254.jpg

    Now explain why not an internal closet flange? Without it, I can't figure out how to sit the flange flush with the finished concrete floor, unless I just get the height absolutely right with the flange in place. I'd prefer to leave the end of the pipe sticking up during the pour instead of the flange attached.

    Thanks so much hj.
  5. mcnattyp

    mcnattyp New Member

    Messages:
    35
    Location:
    Portland Orygun
    Oh wait, how about an even more elegant solution (IMHO)? Option 5:

    IMG_1256.jpg
  6. mcnattyp

    mcnattyp New Member

    Messages:
    35
    Location:
    Portland Orygun
    Regarding the inside flange question, I should state that it is a 4x3 closet bend so the ID of that inside flange is more than 3". Also, my basement slab is going to be the finished floor height, no flooring on top.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,245
    Location:
    Cave Creek, Arizona
    I know it is a 4x3 closet bend, otherwise, I would have commented on that also. I wrap the riser with a cardboard "closet bend sleeve" and remove it after the concrete is poured. Then glue a "slip on" flange to it. Option 4 would be my choice, but as you are finding out, there are MANY ways to do something, so it depends on the installer which way it goes.
  8. mcnattyp

    mcnattyp New Member

    Messages:
    35
    Location:
    Portland Orygun
    Ah-ha, a cardboard sleeve, what a great idea. I had thought of a wooden sleeve of some kind, now it makes so much sense. I will do that, thank you! (And get a metal flange.)
  9. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,048
    Location:
    Maine
    There is also a commercially available plastic cap with a styrofoam support that slips over the pipe during the pour. I generally use foam sill seal and duct tape though.
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,245
    Location:
    Cave Creek, Arizona
    There are several different devices available to "wrap" the bend, besides "do it yourself" options.
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