Mystery pipe
Posted by Brian on September 09, 19100 at 14:47:25:

What could this pipe be?

We have a new house with a partially completed radon midigation system. In trying to figure how to hook it up, I followed it from the basement into the attic in which it vents through the roof. At the bottom of the vertical pipe which extends through the roof there's a drain pipe which I would expect is there to drain rain water. This is where the mystery pipe comes into play: there's also another pipe running up into the attic which is also hooked to this vent pipe which I have no idea what it's for(I know it's not a bathroom fan vent). Does plumming need to be vented? Could that be what it is? (We have city sewer and water if this helps solve the riddle)

Check out the link for this message. Thanks for the help!!!

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