Leach Field Septic Tank Drain Field Layout

A high quality septic drainfield or leach bed design includes inspection ports or pipes that permit inspection of the condition of the field.

Leach field septic tank drain field layout.

Unfortunately drain fields also known as leach fields do not last that long. Vertical pipes are placed usually at the end of each drainfield trench or section or at critical or suspect areas near the drainfield to permit monitoring of liquid levels in the drainfield trenches. A proper drain field needs to have perforated pipes buried in gravel trenches through out the field. The most common reasons for leach field failure are.

Drain fields can consist of four sections 25 feet long or two sections 50 feet long. Septic tank and septic drain field septic drain fields also called leach fields or leach drains are subsurface wastewater disposal facilities used to remove contaminants and impurities from the liquid that emerges after anaerobic digestion in a septic tank. The pipes are surrounded by aggregate that. One a septic system is approved engineers run 3 or 4 inch perforated drain pipe through the leach field at an appropriate depth for the soil conditions.

If placed in an area with good ground absorption a drain field can last up to 10 years. The pipes will need to be placed in gravel and covered with more gravel. Organic materials in the liquid are catabolized by a microbial ecosystem. Septic tanks last from 15 to 30 years.