DRAINTUBE FT - Water and gas drainage for caps

ASQUAL Draintube FT
Marquage CE


At the end of their operation, landfill cells must be contained and covered with topsoil. To drain seeping rainwater and gases produced by waste, a drainage system with DRAINTUBE® FT must be installed underneath and above the geomembrane.

Placed on the geomembrane, DRAINTUBE® FT makes it possible in just one operation to install filtration, rainwater drainage and mechanical protection of the geomembrane. It replaces the upper protective geotextile of the geomembrane, the layer of granular drainage materials and the filtration geotextile.

Placed under the geomembrane, DRAINTUBE® FT drains gases produced by waste, while guaranteeing the mechanical protection of the geomembrane. It replaces the lower protective geotextile of the geomembrane layer of granular drainage materials and the filtration geotextile.

Connection to the collector via the Quick Connect system

The Quick Connect system directly connects the mini-drains from the DRAINTUBE® FT to the main collector drain. In the event of gas drainage, it generates negative pressure in the entire system.



  • Protection of the waterproofing geomembrane against puncture
  • Rapid drainage of seeping rainwater
  • Cost-effective and environmentally friendly solution, does not require any granular material
  • Covering soil filtration
  • Improved waterproofing performance by limiting hydraulic loads on the geomembrane and pressure under the geomembrane
  • Optimised biogas collection
  • Biogas collection in the waste mass to replace drainage trenches
  • Stability of slopes and domes for revegetation
  • Preservation of the mechanical characteristics of the containment layer


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

Projects completed with DRAINTUBE FT

Drainage et protection sous étanchéité

Drainage et protection sous étanchéité

[Travaux publics]

Autoroute A22 terre-plein central - Roncq - Tourcoing (59)
43 000 m2
La zone étanchée du terre-plein central de l'autoroute A22 subit des remontées de gaz. Le dispositif de drainage DRAINTUBE® FT a été installé pour drainer les gaz et garantir l'intégrité de la géomembrane.