Your go to partner


Celebrating 50 Years

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Simplifying Treatment

Eljen GSF

Geotextile Sand Filter System

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Mantis 536-8 & DW

Connecticut's Premier

Wastewater Systems

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Eljen Corporation

GSF & Mantis

Homeowner's Information

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 We will be closed May 13th and May 14th. We will reopen May 17th at 7 a.m. If you have any immediate needs feel free to email We will get back to you as soon as possiable. 

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About Eljen

Established in 1970, Eljen Corporation created the world’s first prefabricated drainage system for foundation drainage and erosion control applications. In the mid-1980s, we introduced our Geotextile Sand Filter products for the passive advanced treatment of onsite wastewater in both residential and commercial applications. Today, Eljen is a global leader in providing innovative products and solutions for protecting our environment and public health. 

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Recent News

August 11, 2020

The GSF is used for a repair system in Indiana with limited usable area.
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July 08, 2020

A wind farm maintenance facility in Kansas used a GSF system when a conventional system wouldn't fit.
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