[trularin]

That was not what I ment when I said the system was closed. I ment that there is no real way for the Mesq. to get in the house from the septic system.

Yes, there are vents, but they are on top of the house and each drain is supposed to have a water trap that prevents septic gases from entering the house.

I see the topic of this topicless thread has made it around to cheese and rocks... again.