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5.
Installation and assembly
5.1
Foundation
The following criteria must be verified prior to installation:
•
The structural suitability of the soil
•
Maximum occurring groundwater levels / drainage of the subsoil
A soil survey should be produced to determine the physical properties of the soil.
5.2
Pit
To ensure that sufficient working space is available, the base area of the pit must exceed the system
dimensions by > 500 mm on each side. The distance from fixed structures must be at least 1000 mm.
If the trench depth is greater than 1250 mm, a slope with the angle β should be built in accordance with
the table below. The foundation must be horizontal and even, and must offer sufficient load-bearing ca-
pacity.
Coarse soil or soft, cohesive soil
Rigid or semi-solid cohesive soil
Rock
The trench must be deep enough that the maximum earth covering (from max. 1200 mm above tank
shoulder) is not exceeded.
Please note: A maximum slope angle of 50° must be adhered to if the area is going to be driven on.
The applied substructure is a course of compacted round gravel (max. grain 8/16 mm, thickness
150 mm).
5.3
Connecting pipes
The GRAF EcoPure 200 is to be moved gently in a horizontal position into the prepared excavation pit
and connected to the appropriate pipes. The inlet pipe and the outlet pipe must slope downwards slightly
by 0.6 %.
5.4
Distance to the downstream infiltration
5. Installation and assembly
Soil type
It must be ensured that no seepage water enters the construction pit of the
EcoPure 200 system. The distance A to be maintained is the difference
between the installation depth of the EcoPure 200 and the infiltration sys-
tem, multiplied by 1.5. However, the minimum distance between Eco-
Pure 200 and infiltration system must not be less than 2 m.
Slope angle β in °
≤ 45°
≤ 60°
≤ 80°
A = 1.5 x ( T
Where:
A:
Distance between infiltration installation and
underground tank
T
:
Installation depth of the EcoPure 200 system
EP 200
T
:
Installation depth of the infiltration system
V
/
– T
) ≥ 2 m
EP 200
V
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