I've had the sump stop working twice. Had an old computer in the unfinished basement on a desk that I messed around on and smelled something funny. When I turned around, there was water creeping up to that wall where the desk was and I was sitting.We’ve had a couple inches of water in our basement due to the power being off and the sump pump not running but it’s not a finished basement so didn’t really damage anything. Or maybe the holes in the vinyl siding from stones getting thrown at the house from the lawnmower when my husband mows.