The Infiltrator EZflow septic system is an environmentally friendly replacement to traditional stone and pipe drainfields using an engineered geosynthetic aggregate modular design. The gravelless EZflow system is designed to improve drainfield performance by eliminating the fines and reducing compaction and embedment associated with stone. Preassembled units include a 3" or 4" perforated drain pipe surrounded by aggregate and held in place with durable, high-strength netting.