TerraDrain® Sheet 203

TerraDrain® Sheet 203 prefabricated drains are constructed using a high strength, high flow capacity, formed polystyrene core with a woven filter fabric bonded to one side. The filter fabric is bonded to each dimple to prevent soil intrusion into the core flow channels while allowing water to freely enter the drain core. The core provides an uninterrupted path for water to flow to designated drainage exits.

TerraDrain® Sheet 203 products are designed for subsurface, single-sided drainage applications requiring high compressive strength and flow capacity. TerraDrain® Sheet 203 is constructed using AASHTO M 288-06 Class 2 filter fabric.

All values provided are intended for rapid comparison purposes, only. Please refer to a specific product’s Product Data Sheet (PDS) and the disclaimers therein for a detailed listing of all characteristics, associated definitions and values needed for structure design, specification compliance review and product submittal purposes. Please Download PDS for all information transfer, printing and submittal purposes.

Property Test Method English Metric


Material 1
Water Flow Rate
ASTM D4491 160 gpm/ft2 6520 Lpm/m2
Grab Tensile Strength
ASTM D4632 410 x 220 lbs 1.824 x 0.979 kN
CBR Puncture Resistance
ASTM D6241 725 lbs 3.22 kN
Apparent Opening Size
ASTM D4571 45 US Std. Sieve 0.354 mm
ASTM D4491 2.3 sec-1 2.3 sec-1
Grab Elongation
ASTM D4632 15 % 15 %
UV Resistance
ASTM D4355 90 % @ 500 hrs 90 % @ 500 hrs
AASHTO M 288-06 2
Survivability Class 2 & 3 Class 2 & 3


Material 1
ASTM D1777 0.44 in 11 mm
Compressive Strength
ASTM D1621 18000 lbs/ft2 862 kPa
Installed Horizontal Flow Rate 3
ASTM D4716 4.1 gpm/ft 51 Lpm/m
Flow Rate 3
ASTM D4716 21 gpm/ft 261 Lpm/m

  • 1   PP = Polypropylene; HIPS = High Impact Polystyrene
  • 2   AASHTO Designation: M 288-06 Standard Specification for Highway Applications; American Association of State Highway and Transportation Officials, 2006. Geotextile survivability classification from installation stresses in subsurface drainage applications.
  • 3   In-plane flow rate measured at 3,600 psf (172 kPa) compressive load and a hydraulic gradient of 1.0.