Can anyone help me identify what is this pipe/conduit could be in my wall? The picture is through the hole where the old electrical box used to be.
I don't really need to do anything with the pipe, I just found it while working on replacing an old electrical box in the bathroom. So I'm just wondering what this pipe is. Also, I'm not sure it has to do anything with plumbing, but since it's a "pipe", I had no better idea which forum to use. Please feel free to redirect me.
I was working on replacing an old electrical box in the bathroom, and I found a horizontal pipe, about 2 inches diameter, running in the wall, about 44 inches high from the floor. This is the wall between the two bathrooms. While most walls in my home are using 2x4 studs, this wall is using 2x6. Most of the cross section of the stud is sawn out to let this unidentified pipe pass through.
I don't see more than a few inches of this pipe. One end is going towards the outside wall, but there is nothing on the outside of my house that would help me identify this pipe. The other end is going towards the cabinet where the furnace is, but there is nothing visible inside the cabinet. The furnace is gas, but the gas pipe is attached from the bottom, through the crawl space. So I don't think the pipe I'm seeing would be gas.
To my untrained eyes, the material looks like EMT tubing, but I'm unsure.
The house does not have knob-and-tube, it has 12/2 ungrounded cables, so I don't think the pipe is related to electrical either. On the picture you also see a bare copper wire, that was (I think) used as makeshift grounding for the old metal electrical box, and probably goes to some water pipe.
The house was built in the 50's, and this is in California.
Thanks for all the tips,