4 inch inside 5 inch sewer pipe?

[jmm1628]

I'm remodeling my basement bathroom and I have a question about the best way to handle installing a new toilet flange. I've attached a picture of the situation. At first I thought the external pipe was some sort of toilet flange that was installed around the 4 inch internal pipe. After breaking it up though I realized that wasn't true and that the 5 inch pipe goes down under the concrete. It looks like a 4 inch sewer pipe was inserted inside of the original 5 inch sewer pipe, but it isn't flush with the concrete. Should I try and remove the 4 inch pipe and install a new insert that's flush with the concrete so I can install a new toilet flange? The outer pipe (that measures at 5 inch inner diameter) goes down at least 12 inches.

Thanks for the help.

 

[Standardairconditioner]

You don't have to remove anything.

You need a 887-GPTMK.

Google is your friend.
http://www.siouxchief.com/products/drainage/residential/closet-flanges/pushtite

 

[Sponsor]

 

[hj]

The 5" "pipe" IS a broken flange and it does not go down 12". IF you break the 4" pipe, you will screw yourself up and create a HUGE problem for yourself. You also probably need a plumber who knows what he is doing.

 

[Asktom]

I'm with HJ. A plumber who knows what she is doing should be able to break out the old closet ring and caulk in a new one without any problem. If a person who doesn't know the ropes busts the pipe below the slab, then it becomes a much bigger project.

 

[Smooky]

The pipe is in the center and there is a cast iron toilet flange leaded onto the pipe. You might be able to drill out the lead and remove the old flange.
http://www.phwarehouse.com/products/4%22-x-6%22-%252d-Cast-Iron-Closet-Flange-XH.html
Here is a link showing a similar flange but it in a wood floor. After doing most of the work this guy decides to take the easy way out as standard-air suggest:
http://www.1925craftsman.com/2015/06/bathroom-coming-along.html
If you get the old flange off here are some types that compress onto the outside of the pipe etc.
https://www.plumbingsupply.com/toilet flanges.html
Be careful not to bust the pipe as mentioned above or you will need to cut a big hole in the concrete so you can get in there to cut off and replace the pipe.

 

[Jadnashua]

Being a 4 inch pipe gives you the option of using an internal connection flange since the outlet of nearly all toilets is barely over 2 inches.

 

[hj]

Any qualified plumber could remove that flange in about 3 minutes WITHOUT having to drill the lead out. And, put the new one on in about 10 minutes, (it takes a while to melt the lead).

 

[Smooky]

If he was a qualified plumber I don't think he would have asked the question. I think drilling it out is a good way to go about removing the lead for a do-it-yourself. He says he is doing the work, I just gave him some suggestions on how he could do it. If he thinks this is too difficult he can decide to call a plumber. Depending on his skills this is a fairly easy do it your self job.

 

[hj]

I was referring to the 'qualified plumber" he maybe SHOULD contact to do this job.