Flooded basement

Sounds like you're talking about the sump pump pit. I would not worry about cracks in it. It essentially just serves as a hole in the basement floor, below floor level that water can run into. Typically there is drain pipe around the foundation that leads into it. And where the pipe comes into the pit, that isn't sealed around anyway. You have a rough cut opening and the pipe just goes through it. The idea is water can run into the pit, then get pumped out. So, some cracks in it are irrelevant.