Canplast GRAF Carat XXL User manual

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Installation and maintenance instructions for
GRAF rainwater storage tank Carat XXL
16.000 - 122.000 liter
Order no.: 380000 - 380026
The points described in these in-
structions must be observed under
all circumstances. All warranty
rights are invalidated in the event
of non-observance. Separate in-
stallation instructions are enclosed
in the transportation packaging for
all additional articles purchased
from GRAF.
The tank must be checked for any
damage prior to insertion into the
trench under all circumstances.
Missing instructions can be down-
loaded on www.graf.info or can be
requested from GRAF.
Table of contents
1.GENERAL NOTES 12
1.1Safety 12
1.2Identification obligation 12
2.INSTALLATION CONDITIONS 13
3.TECHNICAL DATA 14
4.TANK STRUCTURE 16
5.INSTALLATION AND ASSEMBLY 16
5.1Construction site 17
5.2Trench 17
5.3Insertion and filling 18
5.4Routing connections 18
6.ASSEMBLING THE TANK DOME AND TELESCOPIC
DOME SHAFT 19
6.1Assembling the tank dome 19
6.2Assembling the telescopic dome shaft 19
6.3Telescopic dome shaft on which persons may walk 19
6.4Telescopic dome shaft over which passenger cars
may drive 19
6.5Truck telescopic dome shaft 20
6.6Assembling the adapter 20
7.INSPECTION AND SERVICING 20

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1. General notes
1.1 Safety
The relevant accident prevention regulations according to BGV C22 must be observed during all work.
Particularly when walking on the tanks, a 2nd person is required to secure the tank.
The relevant regulations and standards must
additionally be taken into consideration during
installation, assembly, servicing, repair, etc. Rel-
evant notes can be found in the corresponding
sections of these instructions.
During all work on the system or parts of the
system, the entire system must always be ren-
dered inoperable and secured to prevent unau-
thorised reactivation.
Except in the event of work carried out in the
tank, the cover of the tank must always be kept
sealed, as this otherwise constitutes a maximum
risk of accident. The rain protection installed on
delivery is merely transportation packaging. It
cannot be walked on and is not child-proof; it
must be replaced with a suitable cover immedi-
ately following delivery (telescopic dome shaft
with corresponding cover)! Only original GRAF
covers or covers approved in writing by GRAF
must be used.
GRAF offers an extensive range of accessories, all of which are designed to match each other and which
can be extended to form complete systems. The use of other accessories may lead to impediments to the
system's functional capability, therefore invalidating liability for resulting damage.
1.2 Identification obligation
All service water pipes and outlets must be identified in writing with the words "Not drinking water" or in
the form of images (DIN 1988 Part 2, Para. 3.3.2.) in order to avoid inadvertent connection with the drink-
ing water mains even after a number of years. Mix-ups, e.g. by children, may still occur even in the case
of correct identification. All service water extraction points must therefore be installed with valves with
child-proof locks.

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2. Installation conditions
Covering heights with telescopic dome shaft in green
areas
Max. covering heights with extension and telescopic
dome shaft
Max. covering heights with cast telescopic dome
shaft (with class B cast cover) in areas with car traf-
fic (load up to 3.5 t).
Max. covering heights with truck telescopic dome
shaft (with Class D cover to be provided by custom-
er) in areas with truck traffic (load up to 40 t).
The tanks can be only partially installed into the
groundwater. If it is to be expected that the ground
water could rise higher, even occasionally, as shown
in the figure opposite, the ground water must be
discharged via a drain line.
Mini telescopic dome shaft Maxi telescopic dome
shaft + Telescopic
with cast Iron lid
max. 2000
max. 1500 mm

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1
2
3 3 3
4 4
5
220 330 610
340 (Mini)
Htot
L
440 (Maxi)
Htot
220 220 495
140
Htot
H
B
610
3. Technical data
Technical data
Tank
(liter) 16.000 26.000 36.000 46.000 56.000 66.000 76.000 86.000 96.000 106.000 116.000
Order. no. 380001 380002 380004 380006 380008 380010 380012 380014 380016 380018 380025
Weight (kg) 805 1150 1495 1840 2185 2530 2875 3220 3565 3910 4255
L (mm) 4660 7045 9430 11815 14200 16585 18970 21355 23740 26125 28510
B (mm) 2500
H (mm) 2550
Total height
(mm) 3160
Connecting faces
Tank bot-
toms (un-
derneath)
DN100
2
Tank bot-
toms (top)
DN150 2
Tank cyl-
inder (sides)
DN100 12 16 20 24 28 32 36 40 44 48 52
Tank cyl-
inder (top)
DN200 2 3 4 5 6 7 8 9 10 11 12
Tank
dome
DN150 5

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3 3
45
3 3
4
1
2
220
340 (Mini)
Htot
L
330 610
440 (Maxi)
Htot
5
220 220 495
140
Htot
H
B
610
3. Technical data
Technical data
Tank
(liter) 22.000 32.000 42.000 52.000 62.000 72.000 82.000 92.000 102.000 112.000 122.000
Order. no. 38000
0 380003 380005 38000 7 380009 380011 380013 380015 380017 380019 380026
Weight (kg) 1015 1360 1705 2050 2395 2740 3085 3430 3775 4120 4465
L (mm) 6145 8530 10915 13300 15685 18070 20455 22840 25225 27610 29995
B (mm) 2500
H (mm) 2550
Total height
(mm) 3160
Connecting faces
Tank bot-
toms (un-
derneath)
DN100
2
Tank bot-
toms (top)
DN150 2
Tank cyl-
inder (sides)
DN100 16 20 24 28 32 36 40 44 48 52 56
Tank cyl-
inder (top)
DN200 2 3 4 5 6 7 8 9 10 11 12
Tank
dome
DN150 10

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4. Tank structure
Cover
Telescopic dome shaft (can be inclined by 5°)
Profile seal
Tank dome (rotating through 360°)
Tank - tank dome seal
Carat XL underground tank
5. Installation and assembly
Subsoil
Telescopic dome shaft
Compacted foundation
Surrounding (round-grained gravel, max. grain
size 8/16)
Covering layer
Underground tank Carat XXL
Concrete layer for surfaces used by passen-
ger cars / trucks
ß according to DIN 4124

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5. Installation and assembly
5.1 Construction site
Under all circumstances, the following points must be clarified prior to installation:
The structural suitability of the ground according to DIN 18196
Maximum groundwater levels which occur and drainage capability of the subsoil
Types of load which occur, e.g. traffic loads
An expert ground report should be requested from the local planning authority to determine the physical
characteristics of the subsoil.
5.2 Trench
To ensure that sufficient space is available for working, the base area of the trench must exceed the di-
mensions of the tank by 500 mm on each side; the distance from solid constructions must be at least
1000 mm.
The embankment must be designed according to DIN 4124. The construction site must be horizontal and
plane and must guarantee sufficient load-bearing capacity.
The depth of the trench must be dimensioned so that the max. earth coverage (see point 2 – installation
conditions) above the tank is not exceeded. To use the system throughout the entire year, it is necessary
to install the tank and those parts of the system which conduct water in the frost-free area. The frost-free
depth is usually approx. 600 mm – 800 mm; precise information in this regard can be obtained from the
responsible authority.
A layer of compacted, round-grain gravel (grain size 8/16, thickness approx. 150 - 200 mm) is applied as
the foundation.
5.2.1 Slope, embankment, etc.
On installation of the tank in the immediate vicinity (< 5 m)
of a slope, earthen mound or slope, a statically calculated
supporting wall must be erected to absorb the soil pressure.
The wall must exceed the dimensions of the tank by at least
500 mm in all directions, and must be located at least
1000 mm away from the tank.
5.2.2 Groundwater and cohesive (water-impermeable)
soils (e.g. clay soil)
With only occasional ground water and cohesive, water-
impermeable soils (e.g. loam), adequate drainage of the
ground water or leakage water must be ensured so that the
tanks never stand deeper in the ground water than indicated
in the table. If necessary, the drainage line must end in a
vertical DN 300 pipe in which an
immersion pressure pump is installed to pump off the exces-
sive water. The pump must be checked at regular intervals.
If it is to be expected that the tanks could sink lower, ade-
quate drainage must be ensured in all cases.
We recommend the general laying of a drainage line, since
in the event of prolonged rainfall the ground water level can
rise unexpectedly.
5.2.3 Installation adjacent to surfaces used by vehicles
If the underground tanks are installed adjacent to surfaces
which are used by heavy vehicles weighing over 12 t, the
minimum distance away from these surfaces is at least the
depth of the trench.
Tank size All tank size
Immersion depth 1275 mm

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5. Installation and assembly
5.2.4 Connection of several tanks
Two or more tanks are connected via the assembly surfac-
es by means of GRAF special seals DN 100 and basic
pipes (to be provided at construction site).
The apertures must be drilled to the 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.
5.3 Insertion and filling
The tanks must be inserted, impact-free, into the
prepared trench using suitable equipment. The tank is
filled with approx. 25 cm water before filling the tank
surround.
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. Mechanical 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 aper-
ture above the max. water level.

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6. Assembling the tank dome and telescopic dome shaft
6.1 Assembling the tank dome
Prior to assembly, the enclosed seal is locked
onto the tank neck’s profile „B“. The tank dome is
then aligned with the piping connections and is
locked to the tank neck. It is essential to make
sure that the upper seal "A" (pre-assembled) is
correctly installed.
6.2 Assembling the telescopic dome shaft
The telescopic dome shaft enables infinite adaptation of the tank to
given site surfaces with earth coverage of between 750 mm and
950 mm (Mini telescopic dome shaft) or 750 mm and 1050 mm (Maxi
telescopic dome shaft).
For assembly purposes, the enclosed profile seal (material EPDM) is
inserted into the tank dome's sealing groove and is coated generous-
ly with soft soap (do not use mineral oil-based lubricants, as these
attack the seal). The telescope is then greased, inserted and aligned
with the surface of the site.
6.3 Telescopic dome shaft on which persons may walk
Important: To prevent loads from being transferred onto the
tank, round-grain gravel (max. grain size 8/16) is filled in in
layers around the telescope and is evenly compacted. Dam-
age to the tank dome and telescope must be avoided during
this step. The cover is then positioned and is sealed to prevent
entry by children. Tighten the threaded connection on the
cover so tightly that it cannot be opened by a child!
6.4 Telescopic dome shaft over which passenger cars
may drive
If the tank is installed under areas used by passenger cars, the
collar area of the telescope (colour anthracite) must be sup-
ported with concrete (load class B25 = 250 kg/m²). The layer
of concrete to be installed must be at least 400 mm wide and
approx. 200 mm high all around. The minimum coverage above
the shoulder of the tank is at least 800 mm (max. 1050 mm with
telescope, coverage up to max. 1500 mm possible with interme-
diate section).
Attention: It is essential to use the cast telescopic dome shaft (with class B cast cover).
A
A
B
B

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2016-12
Otto Graf GmbH – Carl-Zeiss-Str. 2-6 – DE-79331 Teningen – Tel.: [phone] – Fax: [phone]
GRAF Distribution S.A.R.L – 45, route d´Ernolsheim – FR-67120 Dachstein Gare – Tél.:[phone] – Fax: [phone]
GRAF Iberica Tecnología del Plástico S.L. – Marquès Caldes de Montbui, 114 – ES-17003 Girona – Tel.: [phone] – Fax: [phone]
GRAF UK Ltd – Target House – Thorpe Way Ind. Estate – Banbury – Oxfordshire – UK-OX16 4SP – Tel.: [phone] – Fax: + 44 1295 211333
1
2
3
6. Assembling the tank dome and telescopic dome shaft
6.5 Truck telescopic dome shaft
On installation under areas used by trucks, the telescope is
supported as described in point 6.4. The concrete rings 
(Ø 600 mm) and a cast frame with star-shaped load dis-
tribution for mounting the cast cover are then installed (ob-
serve earth coverage of at least 1000 mm, max. 1500 mm).
The cast frame must have a supporting area of approx. 1 m².
Attention: It is essential to use the truck telescope dome
shaft (class D cover to be provided by customer).
6.6 Assembling the adapter
For lager coverage heights a adapter is needed. To insert the
adapter into the tank dome, soft soap is needed. Into the highest
groove of the adapter the profile seal is inserted an greased
generously. Afterwards push the telescopic dome shaft into the
adapter and adapt it to the planned area surface.
max. earth-cover 1500 mm
(in each case in connection with the Maxi telescopic dome shaft)
7. Inspection and servicing
The entire system must be checked for leaks, cleanliness and stability at least every three months.
The entire system should be serviced at intervals of approx. 5 years. In this case, all parts of the system
must be cleaned and their function checked. Servicing should be carried out as follows:
Drain the tank completely
Clean surfaces and internal parts with water
Remove all dirt from the tank
Check that all internal parts are firmly seated.
Telescopic dome shaft (can be inclined by 5°)
Adapter
Tank dome (can be rotated by 360°)