The Geotextile Sand Filter, GSF for short, is distributed from Australia to Europe, with greater use in the United States. Since the first installations, this product is versatile and proven. It is 100% passive in gravity dosed designs. However, more complicated sites employ a pump for pump to gravity and pressure dosed configurations.

Designers enjoy the high flexibility of the system. Capable of use in trenches, beds and mounds, there is a system configuration that fits whether you find yourself on a sloping site or a site with a high water table.

The GSF system is your tight lot, high water table and poor soil solution. Due to its flexible design, tight repair lots become dream lots, high water tables become gentle sloping lots and poor soils are just another soil. The system excels in intermittent-use sites like campgrounds and seasonal homes, as there are no startup procedures needed. Third-party testing shows treatment begins on day one.

The GSF’s unique design provides treatment and dispersal in the same footprint, while keeping installations easy and maintenance minimal. Open air channels within each module support aerobic bacterial growth on the module’s geotextile fabric, which provides increased surface area for biological treatment that greatly exceeds the module’s footprint. The secondary treatment zone supports unsaturated flow into the soil and works to minimize clogging from anaerobic bacteria. It also protects the soil from compaction and helps maintain cracks and crevices in the soil, preserving the soil’s natural infiltration capacity, which is especially important in fine textured soils where these channels are critical for long term performance.

Eljen provides product training year round, in classrooms, onsite on the job site or virtually. Call or visit the website to set up a training that fits your schedule.

Established in 1970, Eljen Corporation created the world’s first prefabricated drainage system for foundation drainage and erosion control applications. In 1982, the company introduced its Geotextile Sand Filter products for the passive advanced treatment of onsite wastewater in both residential and commercial applications. 

800-444-1359 | | 


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