9 times out 10 they are vents. I guess the old sub contractors wouldnt try to snake from under the sink or down the top, so they just cut holes and drilled into the pipe. We have been putting no hubs on them as we find em. The ones with tape sometimes spew in the wall when it backs up.
What is that the vent? I never saw an access like that before that’s pretty cool you pass the P trap
9 times out 10 they are vents. I guess the old sub contractors wouldnt try to snake from under the sink or down the top, so they just cut holes and drilled into the pipe. We have been putting no hubs on them as we find em. The ones with tape sometimes spew in the wall when it backs up.
@@maintenanceisfun absolutely 👍 this way you can bypass the p trap and just use the plastic thing which I use btw also