Drainage Fields

You can become 2020 regulations compliant by replacing your soakaway with a correctly designed Drainage Field, this allows your Septic tank to discharge into the ground instead of surface water. 

Drainage fields are often inappropriate for tightly constrained sites or ground with low levels of permeability such as clay.       

A Drainage Field is much different to a soakaway, soakaways have traditionally been formed as cube like voids filled with brick rubble or plastic crates. A Drainage field consists of a series of perforated pipes laid out in a looped fashion on a bed of graded stone. 

Graded stone then covers the perforated pipes below a geotextile membrane which allows aerobic digestion to occur, at the head of the field is a distribution/inspection chamber. 

A Drainage field is sized and designed based upon expected in-flow and the permeability of the ground in which it’s sited.