Adelaide Water Tanks

Don’t let the rain go down the drain! Rainwater harvesting is easy with the
Rainbox® underground water tank system. The Rainbox® system comprises
strong plastic modules which are wrapped in a heavy-duty waterproof liner,
“CANAL®”, to form an underground water storage tank. Rainwater is filtered
through a special filtration pit to remove gross pollutants. An above-ground
pump completes the system.

System Benefits

Simple – DIY or use one of our recommended installers. The
modules are lightweight and do not require heavy lifting. Modules
may be supplied flat-pack or pre-assembled.

Flexible – the modular design allows any shape and size, and is
suitable for both domestic and commercial use. Rainbox® is ideal
for sites with difficult access.

High Strength – suitable for use in areas subject to vehicular traffic.

 

www.geosynthetics.com.au

Underground Tank
Installation

Excavate hole. Over-excavate minimum 100mm on each side
of tank. In high water table areas place sub-surface drain to
relieve hydrostatic pressure. Place leveling layer of 50-100mm of
packing sand and compact.

Place CANAL® heavy-duty liner. Take care not to tear or puncture
liner*. For triple modules, maximum tank width 4.2m, to suit
CANAL® 7.6m roll width.

* Carefully inspect CANAL liner for damage prior to installation.

Place modules. CANAL® to base and sides only, place geotextile
over top of tank, 100mm minimum roll overlaps.

Backfill around tank with sand.
Note: Fit 2 no. PVC standpipes through top of tank for connection
of rainwater inlet pipe and second standpipe for tank overflow.
Also fit pump suction line through standpipe.

Note: Simple folded corner on CANAL liner, no welds or joins
required.

Backfill with free draining material on sides and top of tanks.
Minimum top cover for pedestrian 300mm, for vehicles 500mm
minimum of compacted road base.