Top view of wetland cell

The wetland cell is lined with 20 mil plastic, clay, or other water impermeable layer, filled with 12 inches of gravel, and covered with two inches of mulch. Finally, two inches of topsoil are layered on top. Plants are set in the topsoil with their roots in the gravel.

perforated outlet pipe

5" dia. perforated pipe

yjgraywater inlet

Adapted from ASPI Technical Series TP-30, Artificial or Constructed Wetlands.

To 2nd, unlined wetland cell or to lateral drain field. An unlined cell can grow plants requiring less water.

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