::We have what I fear might be an insurmountable issue. The cast iron sewer stack for our 70 yr old house is rusting out where it passes through the basement floor. It comes down the west wall, goes through the floor, then comes out under the east side of our house. In other words it runs under the floor the length of the house, including under the furnace.
I smeared a tub of Flex Seal around it which slowed down the leakage but there’s still a little sewage seeping out around it. Of course our plumber is swamped with A/C calls and can’t look at it for a while.
Norm