This is probably common knowledge, and I’m going to feel pretty stupid for asking this, but can someone please tell me exactly what this is. I’m thinking it’s some kind of clean-out covered with a metal plate, but every time I see these things there’s never any kind of plumbing near it on the inside wall, so I’m not positive what it is.
Thanks for your responses. I see them quite often here in newer homes - usually more than one to a house. I didn’t know what else they could be except some kind of vent, but I just wasn’t sure.