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 Offset flange
Author: plbg trainy (NJ)

My toilet started to leak at the 90' fitting under the toilet whenever it was flushed.I suspected the wax seal so I pulled the toilet and found that the flange was an offset type and was not sure how to set the wax seal because it looks as though it may not seal correctly,the offset is about 2 inches,also it did not leak at the toilet on the floor.

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 Re: Offset flange
Author: bill plumber (FL)

You would install the wax ring the same as a standard flange. If the face of the flange is below the finish floor you may have to install a thick wax ring. Be sure to shim an unlevel toilet and grout the toilet after installation.

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 Re: Offset flange
Author: Shoemaker2 (MA)

When setting a toilet on an offset flange you need to work the wax ring with your hands and form it into a larger circle so it will fit on the flange properly. If you just take it out of the package it will be to small for the flange,
This is what I have found, I am sure there will be other opinions though.

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 Re: Offset flange
Author: bill plumber (FL)

WTF are you talking about? The face of an offset that meets the toilet is exactly the same as a straight flange.

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 Re: Offset flange
Author: joe plumber (NE)

I have set alot of stools in 42 years of plumbing that had offset flanges and I always set them the same as stools having regular flanges.That's a new one on me .Maybe I have been doing it all wrong ,woe is me.

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 Re: Offset flange
Author: CHayn (IL)

I agree with Joe, Same install as normal. YOu may not be able to use a wax ring with a horn, but should be able to use one without.

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 Re: Offset flange
Author: Dunbar (KY)

I know the flange shoemaker is talking about, and yes; you have to shape the wax ring to make it seal.


Type in offset flange in google and somewhere in the list of images that specific flange will show up.

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Always be aware of cross-connections in your potable water systems---They could one day harm you and your loved ones.

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 Re: Offset flange
Author: joe plumber (NE)

Typical offset flange.Like I said earlier, I have never done anything different with the wax ring when setting a toilet with this type of flange.No need to.Before the days of wax rings all we ever used was plumbers putty .Sorry ,but I have to disagree with re- shaping the wax ring.It works for me.



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 Re: Offset flange
Author: HytechPlumber (LA)

The problem with an offset flange is you do not have the added support of the riser pipe to prevent the wax ring from falling into the pipe. Installing the wax ring is the same as a standard flange I just like to push it down some so it holds in place.

On a standard flange the 4" pipe usually comes up all the way to the wax ring. (4" ID)

On an offset flange the riser pipe does not come up all the way leaving approx. a 4 1/2" ID on a plastic flange and approx. 5" ID on a cast iron flange.

All though it is not required you can add some wax to insure a smooth transition at the offset. Especially on the cast iron pipe with lead joint. Usually I make sure there are not any little sharp edges that may possibly grab on to tissue.


... ...... X ......... Good Luck .....

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 Re: Offset flange
Author: Shoemaker2 (MA)

I am thinking of a cast-iron flange. No need to be rude.......

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 Re: Offset flange
Author: dlh (TX)

"On a standard flange the 4" pipe usually comes up all the way to the wax ring. (4" ID) "

that is only for certain types . pvc is one that does not go all the way to the wax seal normally

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PLUMBERS "Protecting The Health Of The Nation"

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 Re: Offset flange
Author: kaw (CA)

I saw an offset flange a few weeks ago that was all plastic and it was oval not round.The first one iv'e ever seen like that.I had splice two wax rings togeather or the wax would not seal the flange.



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 Re: Offset flange
Author: Shoemaker2 (MA)

I bet you set this one....



Reshaped is better....





Edited 1 times.

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 Re: Offset flange
Author: bill plumber (FL)

That pic scared me when I first looked. I wasn't sure what it was. And apon further investigation I don't know if that is an offset flange. But, if you feel you must re-shape your wax rings I'd say go for it.

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 Re: Offset flange
Author: Shoemaker2 (MA)

With that type of flange there is no choice. Out of the package ring will end up in the drain, the same as that one, just causing blockages.

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 Re: Offset flange
Author: hj

You must have the offset flange with an ";oval" opening, which is the worst kind. You have to use part of 2 wax rings and join them together to make the ring big enough to go around the opening. This assumes the bolt slots have not deformed by now so the flange is about to fail.

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 Re: Offset flange
Author: hj

It does if you use a 4" that slips OVER the pipe, and then cut the pipe off flush.

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 Re: Offset flange
Author: hj

quote; The face of an offset that meets the toilet is exactly the same as a straight flange.

HE is talking about the offsets that have an ";oval" opening, and a "shelf" below the toilet outlet.

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 Re: Offset flange
Author: hj

They make the same shape in plastic.

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 Re: Offset flange
Author: hj

What was interesting about the early version of the cast iron flange, was that there were to "tabs" inside the "straight" side. They were there so you could put a closet bolt between them and use the offset to move the toilet sideways. The only problem with that was that it put the wax ring OUTSIDE the closet bolt, so unless the bolt hole was filled with wax, there was no water or sewer gas seal at that bolt.

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 Re: Offset flange
Author: hj

A round wax ring will NOT cover an oval opening. Check you mathematics comparing the perimeter of a circle and an ellipse.

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 Re: Offset flange
Author: joe plumber (NE)

Pictures do not look like an offset flange.

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 Re: Offset flange
Author: moosefish (MI)

hj, your responses are very hard to understand because I can't tell who you are responding to when you leave a battery of replies all in a row. I think it is partly do to this site though, because it doesn't show exactly which comment you are responding to.

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 Re: Offset flange
Author: plbg trainy (NJ)

OK hj I have the oval type in pvc and I built a wall of wax on the thin side of the flange and the wax is holding but what I saw was there was a gap between the flange and the pipe and still when it flushes I get a coupe of drops of water at the drain elbow,I don't think the pipe is connected to the flange,I think it should be.the other scenario would be that the flange is not mounted good and pulls up when tightening the bolts down but I'm not going to mess with it to find out,right now its working and the next step is to call a licensed plumber and see what's going on.

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 Re: Offset flange
Author: Shoemaker2 (MA)

It was an offset flange but regardless that wax ring would fall into the pipe if it wasn't reshaped. That is what caused there problem in the first place.

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 Re: Offset flange
Author: hj

Your site's menu should have an arrow/line from my reply up to the one it refers to. It would be even messier to reply to everyone in the same posting, especially since it is a dynamic site which grows continually.

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 Re: Offset flange
Author: hj

The problem is not the wax ring falling into the pipe, it is that there is no seal unless the wax ring completely encircles the flange's opening. This would be one case where putting the wax on the bowl would be the wrong way, if the installer was not paying attention to what he was doing.

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 Re: Offset flange
Author: bill plumber (FL)

I don't know how many toilets I've set probably in the thousands and I've never reshaped a wax ring.I've doubled them and molded them. I've also never had a call back where the wax ring fell into the flange, or leaked at the flange to toilet connection. But, I guess it is possible it seems someone would have to do something wrong for this to happen. I've also never seen an oval offest but I'm sure they make them I dont see how the flange could be oval when the toilet outlet is round.

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 Re: Offset flange
Author: dlh (TX)

i agree and have had similar experience as bill

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PLUMBERS "Protecting The Health Of The Nation"

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 Re: Offset flange
Author: plbg trainy (NJ)

Thank's to all for helping me diagnose the leak,it turned out to be where I thought it was,the separation of the flange to the pipe I guess whoever did it from the beginning did not fasten the two correctly and over time left a gap allowing the liquids to leak out slowly around the pipe and down.

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 Re: Offset flange
Author: bill plumber (FL)

I googled ";oval offset closet flange" and all I found was HJ posting about them on other forums

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 Re: Offset flange
Author: sum (FL)

our sponsor sells a brass flange that looks oval.

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 Re: Offset flange
Author: hj

The "ring is almost round, but the outlet is at the rear of it. This means the front is over a "ledge" and the "flange" at the rear is almost as thin as the wall of a pipe, so the wax seal does not have much to bond to.

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 Re: Offset flange
Author: hj

Do an Internet search for "Aubuchon 671638" and you will see one. Notice the two "tabs" inside on the left for the closet bolt when it is used sideways. Also notice that the closet bolt would then be INSIDE the wax seal.

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 Re: Offset flange
Author: hj

similar to the ABS and PVC. That one is 4", when it is for a 3" pipe, the "ledge" is more pronounced, since it extends an additonal 1" backwards.

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 Re: Offset flange
Author: bill plumber (FL)

Thanks for the pic. I would never install a flange that looks like that (no offense to our sponsor). That would explain some of the prior posts. Why would anyone install a flange where the mating surface is thinner on one side?

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 Re: Offset flange
Author: Shoemaker2 (MA)

Just to correct bad roughs or so they think...

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 Re: Offset flange
Author: hillbillyles (MO)

That is the one I have in the house we just bought...the ";oval" opening offset flange into 3" pipe. We are replacing the commode and I was good to go until I tried to fit the standard round wax ring onto the oblong hole of the offset flange. There is about a 1/2" opening on the backside (side with the 2 "tabs).

Do they make an oblong/oval wax ring or some sort of oval to round adapter or how would one seal it, now that you have found the one the original poster apparently was speaking of?

Thanks



Edited 1 times.

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 Re: Offset flange
Author: hillbillyles (MO)

Here is a good picture of what I am trying to install my new commode onto. The oval opening is about 3/4" to 1" longer(same width)than the standard round was ring I have and I have not found anything in oval shape. since it is sold with that shape opening I would think there would be a matching ring available but have had trouble just finding a picture of the flange...much less a matching ring.

Any ideas?


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 Re: Offset flange
Author: justincase (NJ)

hillbillyles,
I have the same flange it's a pain in the butt. They don't make an oval wax seal, you have to make one from two wax seals, cut one seal and add a piece to it. I would return that flange and buy one from Lowe's much better design.

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