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10.2 Quick installation guidelines:
A
dry
site is one where the water table never rises higher than the base of the Tricel Duos
tank. A
wet
site is one where the water table may rise higher than the base of the Tricel
Duos tank. The tank should never be installed where ground water can rise higher than the
inlet pipe.
Important
Inlet invert to finished ground level must be determined to ensure the correct installation
procedure is followed. See section 9.
Guidelines
Dry Site
Wet Site
The tank should be located as clode to the septic tank as possible
considering topography and pipe work levels. The tank location should
be specified by a suitably qualified person. The plant must be installed
correctly to ensure surface or ground water does not enter the system.
Never roll the tank. Tanks shall be lifted into position in accordance
with supplier’s instructions. See section 2
Dig a hole 500mm larger than the plant dimensions in plan. The depth
of the hole will be determined by the inlet pipe level.
If the plant contains more than one tank a stepped installation is
required
Remove any soft spots or boulders of significant size from the base
or sides of the excavation.
Ground water must be pumped to give a dry excavation and
excavation lined with polythene.
Determine the type of backfill by taking into account, ground
conditions (wet or dry) and finished ground level (determine if, and
height of riser required). The site engineer should specify the site
conditions.
A base is then formed using compacted gravel and this must be flat
and level.
A base is constructed of a 50mm layer of compacted gravel covered
with a 250mm layer of 25n semi dry concrete.
Ensure gravel/concrete is clean and contains no large materials.
Lift tank into position and align height for connecting pipe work.
Ensure correct inlet and outlet orientations of the plant, which may
