How do you seal a cast iron pipe coming through concrete when the pipe penetration is below the waterline???
I am going to pour concrete around the shower drain pipe in the concrete slab and create a drywell. However, the rusty cast iron pipe will go through the concrete slab below the water line (during the rainy season). I need to seal the seam between the cast iron pipe and concrete so no water will infiltrate into the drywell I am creating. I have no basement; this is on the ground floor of my home.
Any and all valuable advice is welcome and would be greatly appreciated!