OK, here is a real "out there" idea, what if there is a leak on one of the round roof vents, and the previous owner installed this tubing as a drain? Who knows, maybe they had a bucket at the other end of the vent! You should be able to test this idea with a volunteer and a hose. Go up in the attic with a really good flashlight, and have your volunteer aim the hose to rain on the vents, do not spray directly on them spray above and let the water fall on them like rain. Then look in the attic for water dripping.
Good luck, hope this helps.
__________________
Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
|