Cast Pipe Floor Drain
I'm redoing a customer DIY shower in the lower level of a split level home.
When they remodeled they broke up the concrete floor and installed what looks like a cast iron or galvanized drain and pipe, which they tied into the home's main drain line, which sits 18" below the slab. Normally we have access to the crawl or basement and install new PVC runs, but we're not allowed to disturb the pipe, and they don't want us breaking up the slab around the pipe so I can prep the pipe properly.
None of the old work can be opened up, they have since built not just the shower, but also a bedroom and game room - I have to work with the drain as-is.
Right now the top of the vertical part of the cast iron or galvanized drain pipe sits about two inches below the concrete floor and is not threaded.
My question is this. How do I attach a drain to the cast iron pipe? Normally I would put a PVC extension to the drain pipe, then trim to size and attach an appropriate drain, which would be glued to the pipe, and then set with thin set into the pan.
I have nothing to attach a PVC extension to, and there are no threads. I can set the drain in the thinset and let the PVC float within the cast iron drain, but how secure is this?
How should I address this?
Yes, that is the easy fix. Use a chipping hammer and remove the concrete around the pipe down low enough to get the fernco and pvc pipe on there.