This is in my laundry room. I’m pretty sure it’s “pre-plumbed” for a utility sink. With the top two (believe they’re copper) pipes being hot/cold and the middle for drain.
What’s the bottom one? Edit: Thanks redditors! Its a cleanout pipe/drain.
Now how do I go about installing a sink? (Shut water off, use copper spinning tool to cut the stub, install shut off valve?)