<strong>Yahoo Message Number: 15399</strong>Hi, All. I'm sure this has been covered in the past but I sure can't find the topic.<br/><br/>I have a bad odor under the bath sink, usually during the use of the shower or the sink. Of course there is the vent under the sink but something must be plugged to cause gases to come into that area. I did check that the opening of the two vent pipe on the...