Posted by Barb on March 18, 2002 at 22:23:48:
10 minutes after showering, we have a strong sewer odor lasting 10 to 15 min. A plumber has cleaned out the clean out vents and drains - there is no clogs. A plumber has sucked out the water in the ptrap - when this is done there isn't any sewer odor. We are at a complete loss - what can it be?