I have a vent pipe that goes out the front of the house(just above the foundation)it goes down into the drain under the flooring in the basement.I have my plumbing vented already. I do have one toilet in the basement.When you sit on that toilet it (the pipe) is right in your face. I want to remove it, can I? it is made of cast iron and starts on the the floor of the basement goes up and out of the front of the house just above foundation.
I'd hesitate to remove it because it might be a radon vent. A preliminary search for the levels in Massachusetts (Appalachians=granite=radon) reveals some scary hits. It might have been a slow news day IDK, but you should find out what the levels in your area are and whether or not you do have one.
Does it face a driveway? We just installed a head-scratcher like this so we could empty the RV. It could also be a clean-out or just your standard WTF is this thing doing here?
If you feel like pulling your toilet, if you run a snake from the outside and can see it going under the toilet; go nuts. Cap it first, with the toilet still in place and make sure all plumbing still vents correctly (the sink trap should not gurgle; compare flow-rates).