Greywater Discharge Field Systems (Trench) covers gravity-fed trench and bed systems used to disperse greywater or treated greywater into the soil. This includes pipe-and-gravel trench hardware, chambers and related components for conventional gravity land-application layouts. These systems are selected and laid out according to site design, soil conditions and local council requirements to support long-term, reliable soakage without pressurised dripperline.