Hydraulic structures


DRAINTUBE FT - Water and gas drainage under ponds - HS

ASQUAL Draintube FT


Ponds can be built close to the groundwater or on soil made up of organic materials likely to release gases when decomposing. Rising water, air and gases under the waterproofing layer of hydraulic structures such as ponds, generate underpressure likely to result in irreversible deformations of the geomembrane. Drainage under the waterproofing layer is therefore essential for the stability and durability of hydraulic structures.

DRAINTUBE® FT offers a solution adapted to the filtration, drainage of water and gases, as well as the mechanical protection of the geomembrane to avoid these deformations. This drainage system helps discharge water towards one draining trench while distributing residual pressure.

While the drainage capacity of DRAINTUBE® FT is similar to that of a layer of highly permeable drainage material, its cost is lower and it is easier to implement.


  • Waterproofing geomembrane protection
  • Control and limitation of the hydraulic underpressure underneath the geomembrane
  • Product benefiting from more than 20 years of feedback
  • Cost-effective and environmentally friendly solution, does not require any granular material
  • Product easy to install


Drainage Drainage
Filtration Filtration
Mechanical protection Mechanical protection


  • Polypropylene geocomposite
  • Roll width : 3.90 m
  • Roll length : 50 m
  • 3 diameters of perforated mini-drains : 16 mm, 20 mm and 25 mm
  • 4 possible distances between mini-drains : 200 cm, 100 cm, 50 cm and 25 cm


Technical data sheet
Ask for the technical data sheet