I had a wobbly leaking toilet, so decided to try it myself even though I'm not very handy. I got the toilet pulled, and the old flange was practically unrecognizable. Was able to finally pry it loose and get everything cleaned up but the hole underneath there is so big that a new flange doesn't quite have room to anchor onto something solid. If that makes sense. Hopefully the pictures show it. Do I need to fill this in with quikcrete? Or is it a big enough problem that I should just call it professional at this point?

They make quickcrete repair tubes for caulk guns. Would probably just go that route but not get carried away with it.

Man, that's a great question. It just kind of came up and everything crumbled away and there was nothing there. We bought this house and have been finding all sorts of fun problems like that.

You have to have a subfloor and I think they make products to address exactly this problem but I am not versed in them. The box stores sell repair flanges of all sorts but this is one of those things I'd buy one of everything I thought might work and then figure it out at home and return what I didn't end up needing.

There isn't really any concrete below to anchor to. That's why I was wondering if filling it in with concrete is my only option. I just want to make sure before I go and try it.

I think you will need to fill with a waterproof grout to stabilize the pipe and provide a good anchor to the flange.

I haven't had to do this on concrete. I did a replacement in a wood floor and added new wood from underneath.

Someone else may come around with better ideas.

BrazosDog02 said:

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What was it anchored to before??

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Seriously. What a haphazard looking setup.

If water was leaking, it probably rotted the original ring and it came up with the toilet.