Taylor
New Member
I am in the process of finding out where the main waste line is in the basement slab of my 80 yo house. It is clay and needs to be replaced. I am going through layers of asbestos tiles and 2" concrete slab bit by bit....
....when I come across some kind of shallow arch just below the slab (the slab thickens to include it). The waste pipe goes down into the arch and I can see space in there, like a small chamber under the slab. There are also strips of corrugated metal (lead?) embedded in the concrete.
Does anyone know what is going on here? The waste pipe looks very fragile, I am digging it out with a hand-held garden spade, and even so bits of the pipe are sometimes coming up in the debris. Under the circumstances, I'd really like to know what I'm dealing with before I proceed.
From the parts I have dug up, the ceiling of this "chamber" is quite smooth, which leads me to think that this is something premade that was laid down and then the slab poured over it.
Thanks for any enlightenment.
....when I come across some kind of shallow arch just below the slab (the slab thickens to include it). The waste pipe goes down into the arch and I can see space in there, like a small chamber under the slab. There are also strips of corrugated metal (lead?) embedded in the concrete.
Does anyone know what is going on here? The waste pipe looks very fragile, I am digging it out with a hand-held garden spade, and even so bits of the pipe are sometimes coming up in the debris. Under the circumstances, I'd really like to know what I'm dealing with before I proceed.
From the parts I have dug up, the ceiling of this "chamber" is quite smooth, which leads me to think that this is something premade that was laid down and then the slab poured over it.
Thanks for any enlightenment.