Image Number 4 for United States Patent #6012871.
A distribution device is suitable for apportioning effluent discharged by a settling tank among first and second outlets. A receptacle includes an interior chamber, an inlet, and first and second outlets. A dam partially blocks the second outlet. Effluent flows solely through the first outlet until the surface level of the effluent rises to a level sufficient to spill over the dam to begin flow to the second outlet. The receptacle may be a plastic pipe tee. An underground distribution system may use several such devices to initially direct flow to areas of a leaching field having a relatively high ground surface elevation.