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TerraDrain® Chimney Drains

TerraDrain® chimney drains are designed for use in civil structures like slopes and retaining walls. They are fully wrapped with a drainage geotextile to prevent soil intrusion, and the core is perforated to allow flow in two directions.

Hanes Geo offers two series of chimney drain products, C-50 Series (moderate flow) and C-100 Series (high flow). Both are available with multiple drainage geotextile options, including AASHTO M288 compliant products.

TerraDrain® prefabricated chimney drains are constructed by fully wrapping a polymeric perforated core with a nonwoven filter fabric. The filter fabric is bonded to the core to prevent soil intrusion into the flow channels while allowing water to freely enter the drain core from both sides. TerraDrain® chimney drains are available in 12”, 16”, and 24” widths and provide a time saving, effective drainage solution for reducing hydrostatic pressure where full coverage is not required or is not feasible.

TerraDrain® Chimney Drains Specifications
PropertyTest MethodEnglishUnit (Metric Unit)TerraDrain® C-50TerraDrain® C-54TerraDrain® C-56TerraDrain® C-58TerraDrain® C-100TerraDrain® C-104TerraDrain® C-106TerraDrain® C-108
Fabric
Material1 ()PP (PP)PP (PP)PP (PP)PP (PP)PP (PP)PP (PP)PP (PP)PP (PP)
Water Flow RateASTM D4491gpm/ft2 (Lpm/m2)150 (6113)150 (6113)110 (4483)90 (3668)150 (6113)150 (6113)110 (4483)90 (3668)
Grab Tensile StrengthASTM D4632lbs (kN)115 (0.512)130 (0.578)160 (0.712)205 (0.912)115 (0.512)130 (0.578)160 (0.712)205 (0.912)
CBR Puncture ResistanceASTM D6241lbs (kN)320 (1.41)360 (1.55)450 (2.00)600 (2.66)320 (1.41)360 (1.55)450 (2.00)600 (2.66)
Apparent Opening SizeASTM D4571US Std. Sieve (mm)70 (0.210)70 (0.210)70 (0.210)80 (0.177)70 (0.210)70 (0.210)70 (0.210)80 (0.177)
PermittivityASTM D4491sec-1 (sec-1)2.2 (2.2)2.1 (2.1)1.8 (1.8)1.3 (1.3)2.2 (2.2)2.1 (2.1)1.8 (1.8)1.3 (1.3)
Grab ElongationASTM D4632% (%)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)
UV ResistanceASTM D4355% @ 500 hrs (% @ 500 hrs)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)70 (70)
AASHTO M 288-063Survivability () ()Class 3 (Class 3)Class 2 (Class 2)Class 1 (Class 1) ()Class 3 (Class 3)Class 2 (Class 2)Class 1 (Class 1)
Core
Material1 ()HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)HIPS/PP (HIPS/PP)
ThicknessASTM D1777in (mm)0.25 (6.35)0.25 (6.35)0.25 (6.35)0.25 (6.35)0.44 (11)0.44 (11)0.44 (11)0.44 (11)
Compressive StrengthASTM D1621lbs/ft2 (kPa)9000 (431)9000 (431)9000 (431)9000 (431)18000 (862)18000 (862)18000 (862)18000 (862)
Flow Rate2ASTM D4716gpm/ft (Lpm/m)12.5 (155)12.5 (155)12.5 (155)12.5 (155)21 (261)21 (261)21 (261)21 (261)
Product Data SheetsDownload TerraDrain® C-50 Apples PDSDownload TerraDrain® C-54 Apples PDSDownload TerraDrain® C-56 Apples PDSDownload TerraDrain® C-58 Apples PDSDownload TerraDrain® C-100 Apples PDSDownload TerraDrain® C-104 Apples PDSDownload TerraDrain® C-106 Apples PDSDownload TerraDrain® C-108 Apples PDS
  1. PP = Polypropylene; HIPS = High Impact Polystyrene
  2. In-plane flow rate measured at 3,600 psf (172 kPa) compressive load and a hydraulic gradient of 1.0.
  3. AASHTO Designation: M 288-21 Standard Specification for Highway Applications; American Association of State Highway and Transportation Officials, 2021. Geotextile survivability classification from installation stresses in subsurface drainage applications.