AFITEX-TEXEL Enhanced Drainage Geocomposites


The experience and expertise of both AFITEX and TEXEL stand for excellence in the design, development, manufacture and marketing of high quality specialized synthetic materials – such as Draintube – designed primarily for drainage markets. The company transforms basic textiles into high performing geosynthetic drainage products.

Enhanced flow drainage geocomposite Draintube combines standard pipe and geotextile technology into a unique package offering superior long term drainage capacity and performance.

With more than 25 years expertise and references all over the world, Draintube is the most reliable long term drainage geocomposite available.

Standard 3,200 sf rolls (13.1’ x 24.6’) cover over 30% more area than other geocomposites and are installed very much like standard geotextiles. With no nets to tie together and using normal geotextile seaming methods, installation is easy and of better quality.

Our Lymphea design software and our talented professionals are available to help make your project a success from concept to completion.


Directional enhanced flow drainage geocomposite.

The dense network of embedded mini-pipes in the Draintube allow a high flow rate even if the slope is equal to zero. The flow is always evacuated in the expected direction, the direction of the mini-pipes!

Draintube enhanced flow drainage geocomposite enables rainfall to evacuate faster than a homogeneous drainage layer (Del Greco, et al., Eurogeo5, 2012).

Response time Draintube vs Granular layer



Long term drainage capacity

Unlike geonet geocomposites, the load transfer mechanism between the overlying and underlying material is only a fraction of the normal load. The pipe component of Draintube geocomposite is confined by the surrounding. The soil arching effect that applies to other flexible pipes applies to Draintube as well.

Long term drainage capacity

When confined, Creep and Geotextile Intrusion are not a concern for Draintube. The transmissivity of Drain Tubes is primarily gradient sensitive, rather than load or time sensitive, up to loads of at least 50,000 psf (Blond, et al., ICG 2010).

As a consequence, RFCR=1.0 and RFIN=1.0.

Therefore, for most of the applications, the applied combined reduction for Draintube are almost half of those applied to geonet geocomposites (Maier, et al., Geosynthetics mag, 2014).

Hydraulic Transmissivity of Draintube under 50,000 psf


Compatibility with CCRs

Draintube CAPP enhanced flow drainage geocomposite replaces the leachate collection and removal layer. It includes on top a geocomposite filter specifically developed for CCRs. This filter prevents fine particles from passing through it without blocking the leachate flow.


The compatibility of Draintube Coal Ash with CCRs has been validated through a laboratory testing program. Gradient Ratio tests have been used to evaluate the performance of the geocomposite filter again clogging with Coal Ash material. A gradient ration test result inferior or equal to 2.0 indicates acceptable drainage performances.

Gradient Ration per hours


Wide range of geotextiles

The Geotextile E Series brings together geotextile products with mechanical and hydraulic properties optimized for protecting waterproof geomembranes and site drainage. The specific properties of these products allow you to use them as a substitute for sand in order to reduce the volume of fill required. Geotextiles E series allow to increase the containment volume for a given surface area and reduce costs in projects where natural materials are more expensive.

Geotextiles used for rock fill are exposed to significant mechanical stresses and call for the properties of Geotextile E Series:

  • Mechanical resistance to punching caused by rocks and blocks
  • Resistance to UV rays for exposed fabric
  • Adequate permeability for soil drainage
  • Separates and filters in order to ensure protection against erosion