My basement got gutted out and turned into a rental 1 bedroom unit. There were these drain pipes that we overlooked, shown in the photo with the arrows pointing to them. My contractor covered up this short concrete wall where the drain pipes came out from with sheetrock and during a recent storm we had in the bay area water came through these openings and seeped through the wall and ruined the laminate floor. I'm not sure what to do with these drain pipe openings now. Can someone give me some suggestions? Should I seal the openings, connect these drain pipes to a long perpendicular pipe that can dump the water to the outside of the house or find out where these drain pipes originate and work from that end instead? If the latter how can I find out where these pipe originate?
I would suggest finding where thery originate from and cap/plug them there.
As long as you have access to the open ends in the basement (picture won't enlarge so I cant see size of pipes) you could rent a sewer camera with a locate head on it. With this combination you can find where they go to, or rather start. If they are plastic pipes you could seal the back end, if they are metal you should cut then at foundation wall if you can and plug them with water plug product.
Hope that helps