07661903 is referenced by 4 patents and cites 36 patents.

A drain field assembly includes a distribution pipe for receiving liquid effluent that has a plurality of holes through the wall. A plurality of generally cylindrical void pipes receive effluent from the distribution pipe, retaining the effluent for a time, and distributing the effluent to an area of soil. The void pipes are positioned in a trench atop one another so that the cylindrical axis of a bottom void pipe is substantially vertically aligned with the cylindrical axis of a top void pipe, and the cylindrical axis of a middle void pipe is offset from those of the bottom and top void pipes. A distribution pipe is positioned within the top void pipe. In some embodiments a second distribution pipe can be positioned atop the top void pipe. A protective soil-impervious, liquid-permeable sheeting is placed atop and beneath the assembly for protecting the holes pipes from intrusion by soil.

Title
Low-pressure dosing system for sewage disposal and associated methods
Application Number
12/55435
Publication Number
7661903 (B1)
Application Date
March 26, 2008
Publication Date
February 16, 2010
Inventor
Scott M Thomson
Lake Mary
FL, US
Marc H Maroschak
Orlando
FL, US
Douglas G Everson
Tavares
FL, US
Michael D Maroschak
Apopka
FL, US
Agent
Allen Dyer Doppelt Milbrath & Gilchrist P A
Assignee
Plastic Tubing
FL, US
IPC
E02B 11/00
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