Stone Septic Trench

What is a gravel septic trench?

All septic systems have some type of absorption field used to dispose of wastewater (effluent) through absorption into the ground.  Gravel (stone) trenches are the  most common type of absorption field.

In Indiana, trenches bottoms are dug level and then back-filled with stone and a perforated pipe.

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Septic System Trench

Septic System Gravel Trench

Related:  Trench Chamber System