We have a 1947 Cape Cod with poured concrete bathroom floors on the first and second level. The pipes are embedded in the concrete. We had the upstairs bathroom remodeled first and only replaced pipes in the wall. But now that we are tackling the first floor bathroom, the contractor can see in the ceiling to the second floor and says the old galvanized pipes need replacing.

We have an old cast iron tub on the second floor that I'd like to keep, but the concrete is under the tub. Does anyone know of a way to cut out the pipes without removing the entire floor? I'm wondering if they could be removed from below. They are not fully encased in concrete, so you can see the corroding bottoms from the ceiling of the first floor.