Drainage Products

Geotextiles provide a protective layer to help prevent native soil intrusion and clogging of subsurface drains.

There are two different field conditions for the use of geotextiles in underdrains:

“Protected” (or light duty installations)
“Unprotected” (for heavy duty installations)
 
Select the geotextile that will perform and serve the following functions:

• Installation survivability
• Separation
• Filtration
• Environmental stability

Depending on the site conditions including size of rock, height of rock drop and degree of compaction, select from the geotextiles below.

Site Conditions	Suggested Geotextiles
“Protected”	125 EX, 130 EX, 140 EX
“Unprotected”	150 EX, 160EX, 250 EX