Toilet drain / vent for new bathroom

Discussion in 'Toilet Forum discussions' started by jeff_bathroom, May 14, 2006.

  1. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Hi,
    I've attached a photo of my proposed drain / vent for the toilet. The
    pipes shown are not glued yet. I wanted to be sure this configuration is ok for code and whatnot.
    What the photo is showing from top down is the flange, then a 45 degree elbow, then about 24" of 3" pipe connecting to a 3x2 Y to vent. I could not vent behind the toilet due to electrical panel behind the toilet wall, so I'm venting up the wall adjacent and next to the toilet.
    Can anyone tell me if this is ok to go with ?

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    That would work in Washington State for a toilet vent.
  3. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Are you saying it's a bad setup? Can you please
    help a little more w/ details? Thanks.
  4. NaumoffPlumbing

    NaumoffPlumbing Plumbing heating and cooling contractor

    Messages:
    1
    Location:
    Prince Frederick, MD
    Where are you located? Are you getting the job inspected?
    It will work. Different areas have stricter codes then some.

    Terry, I am a new guy so I hope I am not stepping on your toes. :)
  5. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    Not stepping at all.

    The reason I even mention codes and location, is inspectors being who they are, and how large this country is, there will always be some differences.

    What I see are nice wye fittings and 45 els. It looks nice.
    The toilet is one of the few fixtuers that can be vented this way.
  6. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Hi Naumoff,
    I'm in GA. I really appreciate your response. I'm sort of getting the impression that coming straight off the flange at 45 degrees for several feet then venting is a little peculiar. I've seen pictures similar to this in one of my plumbing books.
    I am considering changing this setup so that the drain pipe goes down
    vertically from the flange to just below the joists (about 8.5 inches) then doing a 90 degree and heading directly under the 2" vent pipe connecting to it and the 3" drain using a 3x3x2 combo. I suppose that would be more normal
    than what I have in the photo. But, I don't know how far below the flange I'm "allowed" to go before the 90 degree turn. I need to be below the joists.
    The thing that plumbing books don't talk much about is whether it's ok to run drain pipe at various angles that are not the usual vertical or horizontal with the proper slope per pipe diameter. I know there's issues with fluid speed at different angles, but not much more than that.
    Suggestions welcome ! Thanks again... :)
  7. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Question about toilet flange

    Hi,
    reading my various plumbing books related to toilet connections, I usually see a "closet bend or closet flange" which is a 4" flange with a gradual reduction to 3" diameter. However, I have yet to see one of those in Lowes or Home Depot. Instead I see a short 4" flange with an immediate reduction to 3" such that you connect to a 3" pipe from that small flange. I'm assuming that's the preferred method these days over a closet bend. Is that so?
    I am still wrestling with this connection because immediately below is a cinderblock wall that is in the way by a little over an inch. What I'd like to do is come off of the flange with an 1/8 bend, then down an inch or so and add another 1/8 bend in the opposite direction to bring back to vertical and get around the cinderblock.
    Is that an acceptable/practical/in-code toilet connection ?
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,488
    Location:
    Cave Creek, Arizona
    toilet

    The reason the closet bend into the tee is "normal" is that it is the way most plumbers would do it. But that does not make it more "right" than your way. The "right" way for any installation is the one that is best for that particular set of circumstances. Unless the inspector has some particular reason for not liking it, your way is perfectly okay. I might have come straight down from the toilet flange into a Y for the vent before offsetting it to the drain connection, but that does not make it any better than your design. If would just have used fewer fittings.
  9. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    thx

    Thanks hj,
    I appeciate your help. I'll tape these together again and post
    another photo and see if it looks ok.
  10. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Different Toilet Drain config...

    Hi,
    I've changed the drain/vent config. What say ye ?
    Look better ?

    Attached Files:

  11. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    Frankly, I like the old picture better.

    The new picture would not fly where I plumb.
    The 3x2 santee would need to be replaced with a 3x2 wye or combo fitting.
  12. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,488
    Location:
    Cave Creek, Arizona
    vent

    The system is cleaner that way, just replace the tee with a combination Y-1/8 bend and you should be home free.
  13. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Thanks for the look...

    Terry,
    I thought w/ my old config that the 2 foot long 45 degree drain pipe
    was sort of a no-no, which is why I went to this new configuration.
    HJ,
    I think I know what a Y-1/8 bend is, but I'll need to look it up to be sure.
    Not sure why though that the existing T is an issue. I wondered about the sanitary T; but I thought it was more that you had to have a sanitary T for the drain line rather than it being an issue used in a vent. Thought wrong, I guess.
    Thanks again guys. I'm almost ready to kick this project into gear.
  14. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Y 1/8 bend

    Is that the piece I have in my first photo ?
  15. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,488
    Location:
    Cave Creek, Arizona
    y

    That fitting with a street 45 would be equivalent to the combination, just two pieces instead of one.
  16. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    This got it?

    Hi Terry/HJ,
    I think I've done your bidding. How does the Y w/ 45 look now for vent?
    I've also attached a photo of where this 3" drain connects
    to the main 3" drain running the length of the house. Does that
    Y look ok to connect? I had planned on cutting two short pieces on
    either end and connecting with those screw-tight rubber connectors.
    I originally bought an all rubber Y, but the angle of its Y is not right and
    I didn't like how the inside diameter looks smaller to me than regular 3" pipe.

    Attached Files:

    Last edited by a moderator: May 27, 2006
  17. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Looks fine to me.
  18. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Thanks Cass.
    Is the Y w/ rubber connectors to the main drain ok?
  19. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    [​IMG]
    You will want to go with a metal sleeved coupling.
    They call these shielded no-hub couplings.
    The metal shielding prevents the pipes from shifting over time.
  20. jeff_bathroom

    jeff_bathroom Member

    Messages:
    191
    Location:
    Florida
    Thanks Terry;
    I'll return the rubber ones w/ metal straps and pick up some of those.
    I really appreciate the good advice; thanks again.
    More pics coming of addition of utility sink drain and vent.
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