cast iron toilet flange damaged

[rnorton]

Hi, I'm new to this site and hope I'm where I need to be. I have a cast iron flange that sits in a concrete floor. The flange is 5" ID. The lip of the flange sits above and even with the concrete floor surface. about 3.5 " down is a 4" ID pipe inside of the 5" pipe. I'm not sure what was used to connect the connect the 2 pipes, lead or solder I'm thinking as its shiny when scratched with a screw driver. The toilet bowl mounting slots are broken on the flange lip and a standard wax ring doesn't fit properly in the 5" opening. I bought a PVC repair flange from Lowes that I thought would work but I have 2 issues with it. First, it has a rubber seal that threads onto the PVC. The piece is placed inside of the 4" ID pipe and then threaded down until its tight. The problem is that its not long enough to reach down 3.5 inches to the 4" pipe. The second issue is that after you tighten it down you're supposed to lag it to the floor. The concrete around is about 3/4 inch away from the outside of the pipe so unless I fill in the gap with concrete thats not going to work. I'm looking for suggestions on how to fix this the correct way. I've got pics

 

[frodo]

 

[rnorton]

View attachment 19827

Thanks Frodo, Ive actually used those once before on this same flange but now enough of the lip is broken off or cracking that they don't work now. The other problem is the wax ring barely covers the outside edges of the flange. I'd like to reduce the opening to 4 or 4.5 inches if possible.

 

[CT18]

There is no magic fitting to do what you want that i know of. Break up the floor and run all new pvc. I have never seen a flange that a wax ring wont seal against. Toilet outlets are all the same size i believe

 

[frodo]

kit some 1/4'' drop in anchors
drill the concrete , set the anchors
get 2 ---1/4'' brass bolts and set that sucker