Waste Pipe Repair

[goknights]

I am an amateur diy'er who has never worked with PVC before. My project is to lay floor tile in my bathroom. I removed the linoleum and am down to the sub-floor. I saw that the toilet flange was screwed directly into the sub-floor, and my research told me that it should be placed on top of the finished floor so I set out to remove the existing flange with a chisel so I could glue in a new one after I laid the tile.

Long story short, I severely damaged the waste pipe and only partially removed the flange (I stopped when I saw how much I had cracked it).

I'd appreciate some advice on what my next step is. Is the waste pipe in any way repairable or do I have to cut the whole thing out and replace it all. If I have to replace it all, where do I cut exactly and how would I go about putting in a replacement piece?

I have included a shot of the waste pipe coming out of the floor and a reverse angle so you can see just how much I damaged it. I also included a shot of what lays beyond the opening. I'm guessing that smaller pipe joining in from the left is from my shower drain.

Thank you in advance for your help.

 

[Matt30]

There's nothing wrong with having the flange on the sub floor as long as your wax seal makes contact with the bottom of the toilet. It's very common. Looks like you got yourself in a mess for nothing.

As for your repair, you now have a tricky one with limited space. It looks like all the hubs are cemented tight to one another, leaving no room for a coupling. If the elbow is damaged, what will have to be cut out and replaced, which might mean cutting down stream of the 3x2" wye and re-building that section.

 

[goknights]

Thank you for your time in helping me, but I'm not sure where you are saying the cut should be made. In the following picture are you saying the cut should be made at 1, 2 or 3?

 

[Matt30]

The cut has to be made wherever you have sufficient pipe to work with. You can't put fittings on the hubs of other fittings.

 

[goknights]

Could I cut on line #1, use a ram bit to remove the pipe from the inside of the hub and then use a new piece of pipe to do a slip join to a new 90? Or, are you saying that my only option is to make cut #2 and use some other type of join to put in a new 90?

Thanks again!

 

[frodo]

what size is that pipe?

 

[goknights]

Thank you for your help! Are you saying that despite being badly cracked I can still just put a new flange over what's already there? (after I remove the remaining pieces of fitting as you suggest?) If I understand correctly then what, if anything, should I use to glue/repair the cracks that are already there?

 

[frodo]

no, at first i posted how to remove the old pipe, i did not realise you had cracked the pipe

 

[Matt30]

If you have the space you could use a ram bit, looks like tight quarters for a drill though unless you cut out more of the floor. Give're a shot if you think it will work