Infiltration Tunnel 300

Infiltration Tunnel

The Infiltration Tunnel can be used for infiltration and retention of rainwater or surface water. Three dimensional infiltration ensures extensive water spreading with low installation depth. Easy installation

due to low net weight – no need of gravel. The Infiltration Tunnels should be covered in a geotextile or

membrane which in turn is laid directly on the ground. Rounded edges avoid a rupture in the membrane

covering. Earth covering ≥ 75 cm (29.5”) (60 t load). 2 end plates are required per infiltration string.

Technical data:

• Dimensions (LxWxH): 1160 x 800 x 510 mm (45.7” x 31.5” x 20.1”)

• Weight: approx. 11 kg (24.3 lbs)

• Material: Polypropylene PP

• Volume: 300 litres (79.3 US gal. net)

• Connections on the end plate

- top: DN 110, DN 160, DN 200, DN 300 (4“, 6“, 8“, 12“ pipe)

- bottom: DN 110 (4“ pipe)

• Colour: black

Product: GRAF Infiltration Tunnel

Accessory

End plate for Infiltration Tunnel / Twin

End plates for Infiltration Tunnel / Twin are fitted on every end row of Infiltration Tunnels. They include

connection surfaces of different pipe sizes.

Nominal size connections:

• top: DN 110, DN 160, DN 200, DN 300 (4“, 6“, 8“, 12“ pipe)

• bottom: DN 110 (4” pipe)

Product: GRAF End plate for Infiltration Tunnel / Twin

GRAF-Tex geotextile

Graf-Tex 200 geotextile (8 ounce, non-woven geo-textile fabric), 100% polypropylene filter membrane,

mechanically needle-punched to form continuous filament. Rot-proof material between soil and infiltration

system prevents infiltration layers from silting up. Graf-Tex 200 geotextile ensures long lifetime,

consistent infiltration and high permeability.

Technical data:

• Opening width: 100 µm

• Water permeability coefficient kv (s = 20 kPa) 1,0 x 10-3 m/s

• Tensile strength (lengthwise + crosswise)/2: 15 KN/m

• Punch push-through force (x-s): 2,0 KN

• Weight: 200 g/m²

• Robustness class: 3

• Roll material: Roll width 5 m (196.9“)

Product: GRAF Tex 200

Deaeration end DN 110 (4”)
Deaeration end DN 110 (4”) should always be installed for attenuation/infiltration systems in the event of
heavy inflow of rain/surface water or undersized house venting installation.
Technical data:
• DN 110 (4”)
• Colour: Black
• Rodent guard
• Can be extended with standard DN 110 (4”)

Product: GRAF Deaeration end DN 110 (4”)

Deaeration cover DN 160/200 (6”/8”)
Deaeration cover DN 160/200 (6”/8”) should always be installed for attenuation/infiltration systems in the
event of heavy inflow of rain/surface water or undersized house venting installation.
Technical data:
• DN 160/200 (6“/8“)
• Colour: Black
• Can be extended with standard DN 160/200 pipes (6”/8”)

Product: GRAF Deaeration cover DN 160/200 (6”/8”