sewer odor in bathroom Home › Forums › Public Forums › Drainage & Sewerage › sewer odor in bathroom This topic has 2 replies, 3 voices, and was last updated 22 years, 5 months ago by Robert Stephen Morton. Viewing 2 reply threads Author Posts 16 Jul 2002 at 2:36 pm #279084 MasterPlumbersKeymaster I have ruled out the water traps as the cause of a persistant sewer odor in my downstairs bathroom. How do I determine whether the toilet seal or a clogged vent pipe are causing it? 18 Jul 2002 at 11:22 pm #300007 racefanoneParticipant Call a plumber 19 Jul 2002 at 12:16 am #300008 Robert Stephen MortonParticipant Louise Cornell, again call a licensed Plumber & ask for a smoke test or a water test to identify if a leak exists.Bob Author Posts Viewing 2 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In