We've been having heavy rains in Madison, Wisconsin, lately, and on two occasions I've found water seeping into my basement in this location:
- The red x's mark pipes that seem to have no function. When I moved in two of them had crude wooden plugs, which I improved upon with a steel cap and a rubber stopper. One appears to be a lead pipe that was bent over with a hammer.
- The large cast iron pipe is the main drain for the house.
- The pipe in back drains a utility sink and a bathroom sink.
The water is clear and doesn't smell, and we weren't using much water the two times I discovered the leak (so I don't believe it's coming back up from the house drains).
It seems like water pressure from the drenched soil is forcing rain water through the penetrations where these drain lines go through the basement floor.
The house is 100 years old. The basement is poured concrete (including walls) and there is no sump pit or drain. It's a shallow basement (about 4' deep).
Is there a reliable way to seal around these drain lines to keep this from happening in the future?