Eljen GSF Geotextile Sand Filter
Passive Advanced Treatment Technology
Pretreats effluent with a two-stage biomat
3rd party independent testing data shows that the
   GSF provides advanced treatment of septic
   tank effluent to better than secondary levels
Greater long-term performance
Requires a much smaller installation area
Patented products and technology
Made from recycled materials
No stone required
Lower site impact
Only the Eljen GSF
Pretreats Effluent with a
Patented Two-Stage Bio-Matt™

When your installation requires extra
capacity in less space, the Eljen GSF delivers.
While conventional systems rely on a single biomat
forming at the soil interface, the Eljen GSF adds a second,
primary biomat layer on the surface of its unique Bio-Matt™ Fabric.
Residential Installation