[Shop-talk] Cast iron to PVC soil pipe adapter?

[Karl Vacek]

Why not just use cast iron ?  It's not that horribly expensive compared to
the hassle of trying to reliably join PVC to cast iron.  And no leading is
required below grade nowadays - at least not here in the northeast part of
the Peoples Republic of Illinois, where the unions make sure we have some
pretty tight codes.  You just put in a rubber insert and lubricant, and pop
the fitting together.

Karl



> I'm adding a half bath in the basement and I'm toying with doing the
> plumbing myself. My soil pipe is cast iron, laid horizontally just
> under the surface of the slab. Then there are 2 45s to bring it
> vertical. I need to yank out the 45s and insert a 90. I've seen
> adapters online for inserting vertically PVC pipe into cast iron
> flanges, but never horizontal where the water will theoretically sit
> on the joint. Do I use the same fitting or is it a different process?
> Is there a brand name fitting? Which sealant or caulk?
>
> thanks,
> jim