absorption trench

absorption trench

[əb′sȯrp·shən ‚trench]
(civil engineering)
A trench containing coarse aggregate about a distribution tile pipe through which septic-tank effluent may move beneath earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

absorption trench

absorption trench
A trench containing coarse aggregate and a distribution tile pipe through which septic-tank effluent may flow, covered with earth.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.