absorption field, disposal field
A system of trenches containing coarse aggregate and distribution pipes through which septic-tank effluent may seep into the surrounding soil.
Glossary
coarse aggregate
Glossary
absorption trench
A trench containing coarse aggregate and a distribution tile pipe through which septic-tank effluent may flow, covered with earth.
Glossary
absorption bed
A pit of relatively large dimensions which is filled with coarse aggregate and contains a distribution pipe system; used to absorb the effluent