Can anyone tell me what the heck this 2" PVC pipe is going to my sump pit?!? I have 1 drain tile pipe coming into the pit which is for the outside foundation tile but this white pvc pipe doesn't make sense and I don't know what it's for. My basement is fully finished and there's no basement drain with all plumbing being above grade plumbing. I've never seen anything coming or draining from this pvc pipe so I'm confused. Have a look. Any ideas?