u/Brandosoul28

Hi guys,

I've recently discovered a leak in the basement area of my apartment building. It's appears that it's coming somewhere from a hole in the ceiling and there's a puddle on the basement floor. I can't determine if it's main line issue or possibly a bathroom issue from someone's unit. I contacted a plumber who's supposed to come out next week and he ensured me that it's a main line issue, but I'm still a bit unconvinced. I've added some photos. Someone please chime in.