jimainiac
Platinum Member
Just wondering how leach fields, which are not very deep in the ground, keep from freezing in the sub-freezing temperatures of northern Winters. Haven't really thought about it before, as we're on town sewer, but we're planning to move to our summer place that has a septic system. The frost can go down several feet or more, way past where the leach field sits. I understand how the solids in the tank would make heat as they decompose, but you wouldn't think that the liquid that flows out would be that "hot" when it runs into the leach field. And you can't always count on snow cover to insulate the ground.