Which type of drainfield relies solely on gravity for distributing effluent?

The gravity distribution system is designed specifically to utilize the natural force of gravity for the movement and distribution of effluent from the septic tank to the drainfield. In this system, effluent flows downhill from the septic tank through pipes and into the drainfield, where it is dispersed into the surrounding soil for treatment.

Gravity systems are widely used in septic applications because they do not require any mechanical components, such as pumps or additional power sources, making them generally more reliable and less expensive to operate than systems that rely on mechanical distribution methods. This straightforward approach allows the effluent to flow freely through the piping system, maintaining the necessary pressure and allowing for even distribution across the drainfield.

Other types of distribution systems, like pressure distribution systems or enhanced flow systems, involve mechanical components to manage how effluent is distributed throughout the drainfield, which adds complexity and potential points of failure. Understanding these differences is crucial for selecting the appropriate septic system based on site conditions, soil characteristics, and local regulations.