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Brian, Architect
Category: Plumbing
Satisfied Customers: 3123
Experience:  Licensed Architect- 17 years
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After I flush the toilet the bathroom sink gurgles. I have

Customer Question

After I flush the toilet the bathroom sink gurgles. I have flushed out the vent pipe with water but this did not help.
Submitted: 5 years ago.
Category: Plumbing
Expert:  Brian replied 5 years ago.

Hello and welcome to Just Answer.


You either have a partial obstruction of the main vent stack or an obstruction in the main drain line. Gurgling is caused by either suction from an obstructed vent stack or by back-pressure from an obstructed main drain.

Stick a high pressure garden hose in the main vent stack, up on the roof, and turn it on full to clear the vent stack. If that does not work you will need to use a snake to clear any obstructions in the main or branch drain line.

If you need further help or clarification on this answer, please do not hesitate to reply to this post.