Insertion And Filling; Routing Connections - Graf CARAT XL Mode D'emploi

5.2.4 Connection of several tanks
Two or more tanks are connected via the assembly surfaces by means of GRAF special seals DN 100
and basic pipes (to be provided at construction site).
The apertures must
corresponding size using only the GRAF special
crown bit. It must be ensured that the distance
between the tanks is at least 600 mm. The pipes
must project 100 mm - 150 mm into the tanks.
Please note that the lower openings of the tanks (10.000L) are offset to the side, not in the middle.
Attention must therefore be paid even when positioning the tanks that the openings are located so
as to correspond with one another.
5.3

Insertion and filling

The tanks must be inserted, impact-free, into the
prepared trench using suitable equipment. To
avoid deformities, the tank is filled approx. 25 cm
with water before filling in the tank surrounding.
Afterwards the surrounding (roundgrain gravel,
max. grain size 8/16) is then filled in layers of
max. 40 cm steps and is compacted.
The individual layers must be well-compacted
(manuel tamper). Damage to the tank must be
avoided during
compaction machines must not be used under
any circumstances. The surrounding must be at
least 500 mm wide.
5.4

Routing connections

All feed and overflow pipes must be routed with
a decline of at least 1% in the direction of flow
(possible, subsequent settling must be taken
into consideration in this case). If the tank
overflow is connected to a public sewer, this
must be protected against reflux by means of a
lifting station (mixed sewer) or reflux seal (pure
rainwater sewer) according to DIN 1986.
All suction, pressure and control lines must be
routed in an empty pipe, which must be routed
as straight as possible, without bending, to the
tank with a decline. Necessary bends must be
formed using 30° moulded sections.
Important: The empty pipe must be connected to an aperture above the max. water level.
5. Installation and assembly
be drilled to
compaction. Mechanical
info@graf.info
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the
>1%
Kanal
Sewer
18 / 50
> 600
2. 40 cm
1. 25 cm
25 cm
>1%
>1%