Question: Our sink makes a "glug glug" noise when it empties. Why? What can we do to fix it?
Answer: This is a venting issue. Each fixture drain must have a vent to allow air into the drain and also to let the air displaced by water going down the drain to escape. The noise you hear is the air in the drain escaping into your sink instead of out a vent. It is very important that fixtures are vented correctly to prevent sewer gases from coming into your home. A plumber will be able to make sure the drain is properly vented and to code.
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