Tommy Mac Discussions › Forums › Fix-it Forum: Home Improvement & Do It Yourself Repair Forum › wind sound in sink drain › wind in drain
April 22, 2004 at 8:00 am #230617
It is probably from the vent pipe. Drains should be vented so gasses can escape rather than backing up into the house. These are typically vented through a roof in PVC pipe and a house could have several vents through the roof.