Quote:
Originally Posted by omasou
The picture you included is basically how it works. The waste exits the house, into the first holding tank to let the solids settle. This is what needs to be pumped. The waste water rises until it floats over the divider into the second tank. A pump pumps the water into the leaching field/sand mound through perforated PVC pipes and leaches/filters downward through the sand into the earth until it hits the water table. Sounds like M_Six has a slightly different system.
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My small neighborhood is built on a finger of land that slopes down on two sides. Like a ridge. My land, like most of the houses in the hood, is largely a hill sloping down from the front of the house. We have a walkout basement. Our back yard is maybe 25' of grass and then the woods, which is on the side of a hill. So there's no place for a leaching field. Hence the outfall pipe. There is one house in our neighborhood that had a failed system and when they had it repaired, they replaced the tank/outfall pipe system with a leaching field system. But they had a large side yard area, so they were able to do that.