Rentcuck here, I live in a building dating from the 70s. Picrel is a picture of a copper pipe in the "utility closet" (where the water meter is, behind a panel in the toilets). I know some corrosion is normal on exposed copper pipes but is this still in okay territory or should I be worried ? It's noticeably worse than the other pipes next to it. I'm worried about a leak at some point from it being eaten by corrosion.