Looking for advice on how to seal this hole in concrete block

These two perforations in basement concrete block are the historical electrical runs to the detached garage, both below grade. I've since added a meter to the garage and will be disconnecting these, but as evidenced by the second conduit, it looks like this is an entry point for water (rusty drips on wall). I'd like to either cut these back farther into the block so they drain into the drain tile system but not sure the best way to do that without opening up the block more. Otherwise I was considering using hydraulic cement to plug them both up, but not sure that's the best long term. Rigid XPS board will be going on top of whatever method used to plug up the holes, followed by finished wall. Any ideas on how to cut the conduit from the inside? Or maybe some sort of cap? Thanks for any thoughts! submitted by /u/crzyfsh69 [link] [comments]

Jun 15, 2025 - 04:32

These two perforations in basement concrete block are the historical electrical runs to the detached garage, both below grade. I've since added a meter to the garage and will be disconnecting these, but as evidenced by the second conduit, it looks like this is an entry point for water (rusty drips on wall). I'd like to either cut these back farther into the block so they drain into the drain tile system but not sure the best way to do that without opening up the block more. Otherwise I was considering using hydraulic cement to plug them both up, but not sure that's the best long term.

Rigid XPS board will be going on top of whatever method used to plug up the holes, followed by finished wall.

Any ideas on how to cut the conduit from the inside? Or maybe some sort of cap?

Thanks for any thoughts!

submitted by /u/crzyfsh69
[link] [comments]