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| Stormwater Systems »
Infiltration |
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1. Excavate
pit allowing for tank dimensions and at least 500mm to
each side and 400 to 600mm to the surface. Ensure the
base is level and compacted using a 100mm layer of sand.
The pit should be benched and/or raked in line with safety
regulations.
2. Assemble the modules as per the instructions. There
are 4 sides and 3 braces for a standard duty module and
4 sides and 4 braces for an extra-duty module. Any molding
defect in the product should be noted and set aside for
replacement.
3. Place a layer of geotextile fabric on the base and
to the sides of the pit with enough overlap to cover the
top once complete. The fabric should be overlapped at
least 300mm at each seam.
4. Begin installation of the tank structure by placing
the assembled modules on top and beside one another ensuring
the 450mm side is in the upright position.
5. Use AUSDRAIN™ connector pins to create double
and triple modules. There are 4 connector pins required
to connect one module to another.
6. Connect PVC pipes to the tank by using AUSDRAIN™
150mm pipe connectors or by cutting a hole in the side
of the module and inserting the pipe through. The fabric
will need to be secured around these connections using
adhesive tape.
7. Surround the tank completely with the fabric and overlap
where necessary. It is recommended not to leave the fabric
exposed to sunlight for extended periods.
8. Back fill the tank with clean sand/ fill to the sides
of the tank and to a maximum of 600mm above the tank.
There should be no sharp or hard objects in the back fill
material.
9. There is to be no heavy construction traffic over the
tanks. It is recommended that only light machinery in
the form of bob cats/ skid steers on tracks should traffic
over the tank only once a minimum cover of 400mm is achieved.
10. Once installed section off the tank to prevent any
possible construction traffic. If installed under a carpark
or driveway, the tank only becomes trafficable for light
to medium duty traffic once a re-inforced pavement has
been placed over the surface. Extra-duty modules (4 braces)
must be installed in trafficable areas. |
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