Drains & Toilets Home › Forums › Public Forums › Drainage & Sewerage › Drains & Toilets This topic has 1 reply, 2 voices, and was last updated 24 years ago by robala. Viewing 1 reply thread Author Posts 26 Nov 2000 at 8:41 pm #278771 Anonymous When the toilet is flushed the bathtub drain gurgles. Why is that & how do I correct the problem? Thank You 27 Nov 2000 at 8:53 am #299272 robalaParticipant It sounds like your toilet is not venting properly. It is sucking air from your tub drain when you flush. Look for obstructions in you toilet vent pipe, or your piping is not installed correctly. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In