My well line comes into the basement here. It has a pipe with a cover of some kind that is badly rusted. Suspecting I need it replaced.
I'm wondering what this cover is called and what purpose does it serve? Why is there not just a single pipe coming into the house, or a smaller pipe within a larger pipe without this cap on it? If I break the cap off, will water come flowing in or what's the deal?
Please no doomer worst case scenarios, just trying to arm myself with some knowledge before calling the well guys.
Thanks!

