Can Someone Help Identify This Item?

[Jackfrostspam64]

I have no idea what this could be? Any ideas?

Thanks!

 

[Geofd]

I'm guessing a vent thru the roof that's no longer in use so it's capped off

 

[MicEd69]

I don't believe that is a plumbing item. What is under the tape? Is that a piece of all-thread? What is the material? Brass? Copper? Steel?

Are there any other markings on the "cap" other than 2 1/2"?

 

[Jackfrostspam64]

I'm thinking not a plumbing item also. It's a new construction, commercial building, and there are around 10 of these on the roof. I don't have any more information other than what you see.

 

[havasu]

It the top copper? A lightning rod system?

 

[MicEd69]

It the top copper? A lightning rod system?

I thought about that as well, but lighting rods are usually placed on the parapet wall and connected directly to the building steel, but architects do pretty dumb stuff.

 

[Rossando]

Doesn't look capped to me, looks like a concentric vent cap with something extra. try sticking your hand around the termination if its a space for air to flow could be a vent for an appliance and possibly something for an HVAC unit.

 

[CT-18]

Could be a type of breather for the roof or a vapor mitigation system from below grade. Your best bet would be to try and locate them in the building.