Installation of a Drainage Field. What is a Drainage Field? A Septic drainage fields, sometimes referred to as septic drain fields, leach fields or foul water soakaways, are subsurface wastewater treatment facilities which are used to remove contaminants and impurities from the effluent that emerges from a septic tank. It usually consists of an arrangement of trenches, which contain perforated pipes and gravel, sited beneath a soft landscaped area such as a lawn.
As well as the septic tank, the septic drain field and any other connecting pipework make up the septic system. The septic tank only performs around 45% of the treatment work, the rest of the work is performed by the drain field; which is why it is so important to make sure it
is designed correctly prior to installation.
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