Is your gas meter half buried in mulch? Keep that vent clear under that regulator or youll have problems
I’d get a metal cap with a seal in it and tighten that sumbich down.
Maybe it’s the pee funnel for the wayward soul living in your false ceiling?
And after that there's money missing off the dresser and your daughter's knocked up. I've seen it a hundred timesThat's a tough one to diagnose without knowing where the pipe originates from. Is the ceiling in your furnace room sheetrocked? Maybe you could find that pipe in your furnace room if it's not.
I'm not so sure I'd want the pipe capped. You have water flowing out of it now at a random time. What if you cap it, the water flows in the winter and fills the pipe, then the pipe bursts.... next thing you know you're replacing sheetrock on your ceiling somewhere in your basement.