u/Fantastic-Nerve9196

Hello, I just bought a house with a recently replaced gas water heater in a small garage closet. I noticed there is a loose pvc pipe on the outside and it connects to nothing in the closet. Do you think it was a remnant from the previous water heater? I'd like to seal the hole but don't want to mess up a vent or safety thing. The pipe is loose and not sealed at all. I could almost pull it out but the fitting inside is slightly too big. Thank you for any help!