Drain field system

  • US 5,520,481 A
  • Filed: 06/06/1995
  • Issued: 05/28/1996
  • Est. Priority Date: 03/23/1994
  • Status: Expired due to Term
First Claim
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1. A drain field assembly having a top, a bottom, and two sides for use with a sewage disposal system, the assembly comprising:

  • a generally cylindrical distribution pipe for receiving liquid effluent from the sewage disposal system, the distribution pipe having an inlet at a first end, a second end, a cylindrical axis, a cylindrical cross section, a first half and a second half defined by an imaginary plane bisecting the distribution pipe along the cylindrical axis and through the cylindrical cross section, a wall, and a plurality of holes through the wall, the holes distributed along the second half;

    a plurality of generally cylindrical void pipes for receiving effluent from the distribution pipe, retaining the effluent for a time, and distributing the effluent to an area of soil, each void pipe having a cylindrical axis, a wall, a plurality of holes through the wall, and a plurality of slots through the wall, the slots smaller than the holes;


    the distribution pipe is positioned along the top of the assembly with the second half facing the bottom of the assembly; and

    the distribution pipe and the void pipe are situated in a plurality of adjacent rows, the cylindrical axes of the distribution pipe and the void pipes generally parallel to each other and to the sides of the drain field assembly, with one row comprising void pipes along the bottom of the assembly.

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