Hello all! I'm stumped here. I am working on extending my existing closet space in my master bedroom. There's about 3 feet of space to the left of my closet opening which would allow me to expand;however, looking down this space from the attic reveals a cement? I think, pipe about 4" around. It seems loose because I can move it around. And it doesn't seem to connect to anything. It extends from the ground to the top of the wall in the attic. I have not looked in the craw space to see where it runs but I can not tell if it even goes to anything. Any advice on what this could be? Is it safe to break out and remove?