I think water is coming up from under floor around this pipe which is in middle of the basement in the wall. I knocked out the drywall and pipe comes from floor to about 5 ft high with a vented cap on it. I can't get pic to upload. I think is a vent of some sort. I cannot find a floor drain anywhere. We have a sub pump which seems to be working fine. Main sewer drain is about 3/4 way up on wall and now where near water that is flooding. I do have some cracks in the floor that get damp but not where the flooding is at and never gets like this. Already had 2 different sewers and drain people out they don't know what is happening but are just talking about the main drain line but where then is this water coming from?