Closet bend? … what am I dealing with??

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by idssteve, Mar 5, 2013.

  1. idssteve

    idssteve New Member

    Messages:
    7
    Location:
    Santa Fe NM
    The ABS toilet closet bend stubbed up out of the slab protrudes 1†above the floor surface. It measures 4.5†OD and 3.75â€ID. I’m no pro so these dimensions seem strange to me. This tube has been wrapped with foam and duct tape to create an opening in the slab that is about 6†diameter. No good way to anchor the toilet. What am I dealing with? What kind of fittings will I need to install a closet flange? Appreciate any comments.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,635
    Location:
    Cave Creek, Arizona
    IT was installed CORRECTLY. You just need a conventional 4" flange that fits OVER the pipe. Apply glue to the riser and the flange and slide the flange down until it is on the floor. Then cut the riser off flush with the top of the flange. I, and most plumbers, do not worry about anchoring a flange on a concrete floor because the bend is NOT going to move anywhere with the dirt packed around it.
  3. MACPLUMB 777

    MACPLUMB 777 TROJAN WORLDWIDE SALES RP

    Messages:
    679
    Location:
    Houston, Texas, United States
    If the flange sticks out over the concrete you can use Tapcon screws to anchor to the concrete,
    If you have open space hang some stainless steel screws down though the flange and then fill in with a very soupy mixture
    of instant set concrete mix
    Last edited: Mar 6, 2013
  4. idssteve

    idssteve New Member

    Messages:
    7
    Location:
    Santa Fe NM
    Thanks guys. Is there a name for the flange fitting i should ask for? Some over the pipe flanges ive found around here would slip over a 4"OD pipe but wont slip over the 4.5" diameter "pipe" sticking out of the slab. ??
  5. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    Most if not all piping in plumbing is measured by inside diameter, 4" ID = 4.5" OD.

    Attached Files:

    Last edited: Apr 4, 2013
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,635
    Location:
    Cave Creek, Arizona
    I don't know where you would find a 4.0" o.d. pipe of ANY material.
  7. idssteve

    idssteve New Member

    Messages:
    7
    Location:
    Santa Fe NM
    Thanks again guys, obviously i'm needing something to slip over a standard 4" pipe. The largest ID flanges found at our local "hardware" are 4.5" OD, just like the pipe i'm trying to slip over. That fitting looks like it would fit over a 3.5" (4"od) pipe for what good that does. Everything else in that store is smaller. The first thing the young girl showed me was something to mount a clothes hanger rod in a closet :) but she is trying to help. Her father will be back next week and promises to order what ever i need. I just don't know what to call the "conventional" 4" slip over flange?? A "...4" slip over flange"?? ;) Their catalogs don't seem to list anything with a name like that. ??

    Try as i might, there just isn't enough slab to screw the flange screws into. Filling the gap with thin set of some kind (epoxy?) sounds viable if there's a way to get the stuff in there after the flange is set. We're planning to mount an ADA toilet and feel like it needs to be anchored pretty solidly. Thanks again for the very useful ideas. All i need now is the right flange. :)
  8. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,246
    Location:
    Land of Cheese
    Last edited: Apr 6, 2013
  9. idssteve

    idssteve New Member

    Messages:
    7
    Location:
    Santa Fe NM
    Thank you VERY much. That 43520 should do the trick. They had an Oatey catalog so all is well. :)

    Embarrassing thing for me is that it's simply called a 4" closet flange... ;) No clue what the flange we originally found is called but we're on the right path now.

    Thanks again! :)
  10. wjcandee

    wjcandee Wise One

    Messages:
    1,852
    Location:
    New York, NY
    Funniest part about that spec sheet is that the description in the tech specs box says that the 3"/4" one fits inside a 3" pipe and over a 4" pipe.

    They get it right in the description below: the 3"/4" one solvent-welds inside the 4" or over the 3" while the Over-4" one solvent-welds over (outside) a 4" pipe.
  11. idssteve

    idssteve New Member

    Messages:
    7
    Location:
    Santa Fe NM
    Yeah, makes you wonder who's editing their spec sheets but Oatey's been at this for a LONG time. :).
    I'd originally started with a 3"/4" flange but the ID of the existing fitting is about 3-3/4". The 3"/4" flange fits inside a 4"ID pipe. The other flange they had was 4"ID 4.5"OD. Obviously intended to fit inside of a 4.5"ID socket. First one of those I've seen but I'm no pro. ;).

    Only other issue is anchoring the flange. I'll probably hang stainless screws as macplumb suggested & pour some Chockfast through the flange's T slots. That should also help seal against toilet overflows running under the slab. Amazing how little concern there seems about sealing under flanges?

    Thanks again for everyone's suggestions AND patience. :)
  12. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,635
    Location:
    Cave Creek, Arizona
    quote; 3"/4" one fits inside a 3" pipe and over a 4" pipe.

    You have it backwards. It fits OVER a 3" pipe and inside a 4" hub. The ones that are "pipe size", like that one, are "spigot closet flanges". I once had a realtor whose father owned a hardware store. When she was younger, she helped out. One day a man asked for a "3/8 inch nipple" and she slapped him.
    Last edited: Apr 8, 2013
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