Exposing floor drain in lightweight concrete slab

[annerborn]

Hello!

I posted a thread under plumbing, but I'm starting to suspect that I might have posted it here instead.

What I'm wondering is how I can expose and replace a floor drain that is embedded in a basement slab (10 cm lightweight concrete on 20 cm Siporex elements) without damaging/weaking the slab.

Here is the original thread with a more detailed description of the situation:
https://www.byggahus.se/forum/threa...n-i-laettbetongbjaelklag.331994/#post-3160444