I recently remodeled my bathroom and removed a vanity. I capped off the 2" stack at the floor and then the ceiling as well. I left open for five days to make sure the apartment above and below were not tied into the stack. Its been nearly two months with no complaints about odor or drain issues with the apartments above or below. I just want a lil reassurance from a professional that I didn't screw up someone else's unit. It was built in 1908 but must have been updated at some point because it was all pvc pipping. Any answers or pat on the back would be much appreciated. Thanks!