Re: 4" open ended pipe in basement walls
It may be a drain pipe that has failed in some way so that instead of draining it lets water in.
Since you're getting flooded anyway, I don't see what harm there is in temporarily plugging it as a test. Cheap and easy.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.