I've got a problem with sewer odor coming from a floor drain. I assume
this only happens if the trap does not have enough water to close off
the air path. And, I assume there are only two reasons why the trap
might be dry: evaporation and a leak in the trap. Since water is
periodically poured into the trap I'm leaning towards the fact that
there is a leak. But before I go to the trouble and cost of tearing up
the concrete floor to verify this I'd like to solicit comments from
the experienced listnerers out there for suggestions and ideas on what
to try to test my assumptions.
Some thoughts I've had:
Is there a video inspection technique that could verify a leak?
Someone suggested pouring mineral spirits into the drain (won't
evaporate like water). (Will this cause any problems on a septic
Thanks for any ideas.