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Pre-Fabricated Geocomposite Drain for Use as a Combined Drainage and Protection Layer with Grace Waterproofing Membranes

4' x 50' Roll

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Availability: In stock



Hydroduct 220 is a strong, preformed 0.44 in. (11 mm) thick geocomposite drainage sheet system, comprising a hollow studded polystyrene core, covered on one side with a nonwoven, needle punched polypropylene filter fabric and on the other side with a smooth polymeric film.


  • Enhances waterproofing—eliminates hydrostatic pressure build-up
  • Efficient water collector/deflector—can be used as a sandwich drainage layer between lagging and the reinforced concrete structure
  • Smooth polymeric sheet—compatible with Preprufe, Procor, or Bituthene membranes
  • Simple convenient drainage and protection layer—serves as robust membrane protection and drainage
  • Geotextile fabric filter—allows ground water to pass into the drain core while restricting the movement of soil particles
  • High flow capacity—drains 17 gals/min./ft (211 L/min./m) width
  • Rot proof—unaffected by permanent immersionin water, bacteria, dilute acids and alkalis
  • Economical—eliminates imported aggregate drainage layers
  • Studded core—allows water to flow todesignated drainage collection points

Hydroduct 220 is designed primarily for use with waterproofing materials in vertical installations. Hydroduct 220 has been specially developed to provide a simple and highly practical collector and deflector of unwanted ground water on foundation walls, retaining walls, tunnels and planters. It can be used with Preprufe, Procor, or Bituthene waterproof membranes. When installed it protects the membrane from damage and minimizes the build-up of percolated surface water against the structure. The construction of the studded sheet also creates an air void to isolate the structure from the effects of the surrounding ground.

Hydroduct 220 has been designed to withstandground pressures and the compaction forces of wet concrete to maintain a high water flow capacity.The drainage sheet must be connected into the site drainage system to minimize hydrostatic build-up and collect infiltrated water using Hydroduct Coil 600 or traditional perforated pipes wrapped and linked with the geotextile filter fabric to prevent clogging.

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