Graf Carat S User manual
Document No. Graf-0004 Rev. 1
INSTALLATION MANUAL
The Carat-S tank Garden Comfort system
Rainwater Harvesting
. GENERAL NOTES
Graf UK Ltd
GENERAL NOTES
1.1 Safety
The relevant accident prevention regulations must be
observed during all work.
The relevant regulations and standards must
additionally be taken into consideration during
installation, assembly, servicing, repair, etc.
The system or individual parts of the system must be
installed by qualified specialists.
During all work on the system or parts of the system,
the entire system must always be rendered inoperable
and secured to prevent unauthorised 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. Only
original GRAF covers or covers approved in writing by
GRAF must be used.
GRAF oers 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 accessories that have not been approved by GRAF
results in the exclusion of the warranty/guarantee.
1.2 Identification obligation - Regulation
The water in these systems is not suitable for
consumption or personal hygiene.
All pipe work and outlets of the water systems are
to be labelled with the words “Not drinking water”
either in words or graphically. British Standard BS EN
16941-1:2018) so that after years of use, an accidental
connection to the drinking water system is prevented.
Even when correctly labelled it may possibly be
mistaken, for example by children. For this reason, all
the outlets of the systems process water must be fitted
with child safe valves.
1
. TECHNICAL DATA
Graf UK Ltd
TECHNICAL DATA
2
Tank 2700 litres
700 US-gallons
3750 litres
1000 US-gallons
4800 litres
1250 US-gallons
6500 litres
1700 US-gallons
Weight 120 kg 150 kg 185 kg 220 kg
L2080 mm 2280 mm 2280 mm 2390 mm
W1565 mm 1755 mm 1985 mm 2190 mm
H1400 mm 1590 mm 1820 mm 2100 mm
Htot* 2010 mm 2200 mm 2430 mm 2710 mm
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4 /
3. Technical data
Tank 2700 litres
700 US-gallons
3750 litres
1000 US-gallons
4800 litres
1250 US-gallons
6500 litres
1700 US-gallons
Art. No. 372024 372025 372026 372027
Weight 120 kg 150 kg 185 kg 220 kg
L2080 mm 2280 mm 2280 mm 2390 mm
W1565 mm 1755 mm 1985 mm 2190 mm
H1400 mm 1590 mm 1820 mm 2100 mm
Htot* 2010 mm 2200 mm 2430 mm 2710 mm
Htot Htot
Htot
Htot
* Htot = total height
* Htot = total height (without telescopic dome shaft)
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4 /
3. Technical data
Tank 2700 litres
700 US-gallons
3750 litres
1000 US-gallons
4800 litres
1250 US-gallons
6500 litres
1700 US-gallons
Art. No. 372024 372025 372026 372027
Weight 120 kg 150 kg 185 kg 220 kg
L2080 mm 2280 mm 2280 mm 2390 mm
W1565 mm 1755 mm 1985 mm 2190 mm
H1400 mm 1590 mm 1820 mm 2100 mm
Htot* 2010 mm 2200 mm 2430 mm 2710 mm
Htot Htot
Htot
Htot
* Htot = total height
* Telescopic dome shaft at maximum height
340 Mini telescopic lid)/
440 (Maxi telescopic lid)
410 300
575 610
HHtot
L
* Telescopic dome shaft at minimum height
Htot
300
140
300
575 610
H
B
. TANK STRUCTURE
Graf UK Ltd
1. Subsoil
2. Telescopic dome shaft
3. Compact foundation
4. Surrounding (round-grained gravel, maximum grain size 10 to 20mm)
5. Covering layer
6. Carat underground tank
7. Concrete layer for surfaces used by passenger cars
1 4 7
63
2 5
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5 /
< 300 mm
< 300 mm
< 300 mm
< 300 mm
< 300 mm
< 300 mm
< 300 mm
< 300 mm
> 150 mm
ß
63
1425
> 100 mm
7
5. Installation and assembly
Subsoil
Telescopic dome shaft
Compacted foundation
Surrounding (round-grained gravel, max.
grain size 8/16)
Covering layer
Carat underground tank
Concrete layer for surfaces used by
passenger cars
ß according to DIN 4124
6
7
89
10
7
8
9
5
2
3
4
1
TANK STRUCTURE
3
1. Cover
2. Telescopic dome shaft (can be inclined by 5°)
3. Profile seal
4. Tank dome (can be rotated by 360°)
5. Tank – Tank dome seal
6. Upper half shell / Carat underground tank
7. Centring pins
8. Profile seal
9. Quick connection
10. Lower half shell / Carat underground tank
INSTALLATION & ASSEMBLY
4
ß according to DIN 4124
ß
. INSTALLATION & ASSEMBLY
. INSTALLATION & ASSEMBLY
Graf UK Ltd
INSTALLATION & ASSEMBLY
4.1 Tank assembly
First insert the circumferential profile seal into the
sealing groove in the lower half shell . Lightly coat the
seal with the enclosed soft soap.
Then insert the centring pins into the intended
mountings around the circumference.
The upper half shell is now positioned onto the lower
half shell and the quick connectors are installed. To
do this, each 2nd quick connector is pre-adjusted in the
1st step and is secured with a hammer and a wooden
support. The quick connectors engage in their end
position. The remaining quick connectors are then
installed.
Attention: When positioning the upper half shell, it must
be ensured, under all circumstances, that the seal does
not slip out of the groove.
4.2 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. trac loads
An expert ground report should be requested from the local planning authority to determine the physical
characteristics of the subsoil.
4
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6 /
5. Installation and assembly
5.1 Tank assembly
First insert the circumferential profile seal dinto the
sealing groove in the lower half shell c. Lightly coat the
seal with the enclosed soft soap.
Then insert the centring pins einto the intended
mountings around the circumference.
The upper half shell fis now positioned onto the lower
half shell cand the quick connectors gare installed. To
do this, each 2nd quick connector is pre-adjusted in the
1st step and is secured with a hammer and a wooden
support. The quick connectors engage in their end
position. The remaining quick connectors are then
installed.
Attention: When positioning the upper half shell, it must
be ensured, under all circumstances, that the seal does
not slip out of the groove.
5.2 Construction site
Under all circumstances, the following points must be clarified prior to installation:
xThe structural suitability of the ground according to DIN 18196
xMaximum groundwater levels which occur and drainage capability of the subsoil
xTypes 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.
www.graf.info
6 /
5. Installation and assembly
5.1 Tank assembly
First insert the circumferential profile seal dinto the
sealing groove in the lower half shell c. Lightly coat the
seal with the enclosed soft soap.
Then insert the centring pins einto the intended
mountings around the circumference.
The upper half shell fis now positioned onto the lower
half shell cand the quick connectors gare installed. To
do this, each 2nd quick connector is pre-adjusted in the
1st step and is secured with a hammer and a wooden
support. The quick connectors engage in their end
position. The remaining quick connectors are then
installed.
Attention: When positioning the upper half shell, it must
be ensured, under all circumstances, that the seal does
not slip out of the groove.
5.2 Construction site
Under all circumstances, the following points must be clarified prior to installation:
xThe structural suitability of the ground according to DIN 18196
xMaximum groundwater levels which occur and drainage capability of the subsoil
xTypes 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.
www.graf.info
6 /
5. Installation and assembly
5.1 Tank assembly
First insert the circumferential profile seal dinto the
sealing groove in the lower half shell c. Lightly coat the
seal with the enclosed soft soap.
Then insert the centring pins einto the intended
mountings around the circumference.
The upper half shell fis now positioned onto the lower
half shell cand the quick connectors gare installed. To
do this, each 2nd quick connector is pre-adjusted in the
1st step and is secured with a hammer and a wooden
support. The quick connectors engage in their end
position. The remaining quick connectors are then
installed.
Attention: When positioning the upper half shell, it must
be ensured, under all circumstances, that the seal does
not slip out of the groove.
5.2 Construction site
Under all circumstances, the following points must be clarified prior to installation:
xThe structural suitability of the ground according to DIN 18196
xMaximum groundwater levels which occur and drainage capability of the subsoil
xTypes 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.
. INSTALLATION & ASSEMBLY
Graf UK Ltd
4.3 Trench
To ensure that sucient space is available for working, the base area of the trench must exceed the dimensions of
the tank by 500 mm on each side; the distance from solid constructions must be at least 1000 mm.
The trench embankment must be designed so that slippage or collapse of the embankment wall is not to be
anticipated. The construction site must be horizontal and plane and must guarantee sucient 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 hold 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.
4INSTALLATION & ASSEMBLY
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7 /
5. Installation and assembly
5.3 Trench
To ensure that sufficient space is available for working, the base area of the trench must exceed the
dimensions of the tank by 500 mm on each side; the distance from solid constructions must be at least 1000
mm.
The trench embankment must be designed so that slippage or collapse of the embankment wall is not to be
anticipated. 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.
5.3.1 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.
5.3.2 Groundwater and cohesive (water-impermeable)
soils (e.g. clay soil)
If it is anticipated that the tanks will be immersed deeper
into the groundwater than is shown in the adjacent figure,
sufficient dissipation must be ensured. (See table for max.
immersion depth).
Dissipation of the drainage water (e.g. via an annular
drainage system) is recommended in the case of cohesive,
water-impermeable soils.
Tank size 2700 L
700 US-gallons
3750 L
1000 US-gallons
4800 L
1250 US-gallons
6500 L
1700 US-gallons
Immersion depth 700 mm 795 mm 910 mm 1050 mm
5.3.3 Installation adjacent to surfaces used by vehicles
If the underground tanks are installed adjacent to surfaces
which are used by vehicles heavier than passenger cars,
the minimum distance away from these surfaces is at least
the depth of the trench.
>800 <1800
1000
4.4.1 Standard installation overview
Coverage heights with telescopic dome shaft in green
areas.
4.4.2 Maximum cover permitted over tank
Maximum coverage heights with extensions and
telescopic dome shaft.
4.4.3 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.
Mini telescopic
dome shaft
Maxi telescopic with cast iron lid
1200
Max 1500
. INSTALLATION & ASSEMBLY
Graf UK Ltd
Tank 2700 litres
700 US-gallons
3750 litres
1000 US-gallons
4800 litres
1250 US-gallons
6500 litres
1700 US-gallons
Immersion depth 700 mm 795 mm 910 mm 1050 mm
www.graf.info
7 /
5. Installation and assembly
5.3 Trench
To ensure that sufficient space is available for working, the base area of the trench must exceed the
dimensions of the tank by 500 mm on each side; the distance from solid constructions must be at least 1000
mm.
The trench embankment must be designed so that slippage or collapse of the embankment wall is not to be
anticipated. 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.
5.3.1 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.
5.3.2 Groundwater and cohesive (water-impermeable)
soils (e.g. clay soil)
If it is anticipated that the tanks will be immersed deeper
into the groundwater than is shown in the adjacent figure,
sufficient dissipation must be ensured. (See table for max.
immersion depth).
Dissipation of the drainage water (e.g. via an annular
drainage system) is recommended in the case of cohesive,
water-impermeable soils.
Tank size 2700 L
700 US-gallons
3750 L
1000 US-gallons
4800 L
1250 US-gallons
6500 L
1700 US-gallons
Immersion depth 700 mm 795 mm 910 mm 1050 mm
5.3.3 Installation adjacent to surfaces used by vehicles
If the underground tanks are installed adjacent to surfaces
which are used by vehicles heavier than passenger cars,
the minimum distance away from these surfaces is at least
the depth of the trench.
>800 <1800
>800 <1500
>800<1500
max 12 to
>800<1500
Max 12 to
Max 8 to
4.4.4 Groundwater and cohesive (water-
impermeable) soils (e.g. clay soil)
If it is anticipated that the tanks will be immersed deeper
into the groundwater than is shown in the adjacent figure,
sucient dissipation must be ensured. (See table for max.
immersion depth).
Dissipation of the drainage water (e.g. via an annular
drainage system) is recommended in the case of cohesive,
water-impermeable soils.
4.4.5 Installation below light-duty vehicle
surfaces
Covering heights with cast telescopic dome shaft
(with class B cast cover) in areas with car trac
(load up to 3.5 t).
4.4.6 Installation below heavy-duty vehicle
surfaces
Coverage heights with Begu telescopic dome shaft (with
cover class D – to be provided at construction site) in areas
used by trucks with a max. weight of 12 to.
4INSTALLATION & ASSEMBLY
. INSTALLATION & ASSEMBLY
Graf UK Ltd
INSTALLATION & ASSEMBLY
4.4.7 Installation adjacent to surfaces used
by vehicles
If the underground tanks are installed adjacent to
surfaces which are used by vehicles heavier than
passenger cars, the minimum distance away from
these surfaces is at least the depth of the trench.
4.4.8 Connection of several tanks
Two or more tanks are connected via the assembly
surfaces by means of GRAF special seals 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 at least 200 mm into
the tanks.
4.5 Insertion and filling
The tanks must be inserted, impact-free, into the
prepared trench using suitable equipment. The
tank is filled with 1/3 water before filling in the tank
surrounding.
Afterwards the surrounding (roundgrain gravel, max.
grain size 8/16) is then filled in layers of max. 30 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.
4.6 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.
4
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7 /
5. Installation and assembly
5.3 Trench
To ensure that sufficient space is available for working, the base area of the trench must exceed the
dimensions of the tank by 500 mm on each side; the distance from solid constructions must be at least 1000
mm.
The trench embankment must be designed so that slippage or collapse of the embankment wall is not to be
anticipated. 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.
5.3.1 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.
5.3.2 Groundwater and cohesive (water-impermeable)
soils (e.g. clay soil)
If it is anticipated that the tanks will be immersed deeper
into the groundwater than is shown in the adjacent figure,
sufficient dissipation must be ensured. (See table for max.
immersion depth).
Dissipation of the drainage water (e.g. via an annular
drainage system) is recommended in the case of cohesive,
water-impermeable soils.
Tank size 2700 L
700 US-gallons
3750 L
1000 US-gallons
4800 L
1250 US-gallons
6500 L
1700 US-gallons
Immersion depth 700 mm 795 mm 910 mm 1050 mm
5.3.3 Installation adjacent to surfaces used by vehicles
If the underground tanks are installed adjacent to surfaces
which are used by vehicles heavier than passenger cars,
the minimum distance away from these surfaces is at least
the depth of the trench.
>800 <1800
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8 /
5. Installation and assembly
5.3.4 Connection of several tanks
Two or more tanks are connected via the assembly surfaces by means of GRAF special seals 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 at least
200 mm into the tanks.
5.4 Insertion and filling
The tanks must be inserted, impact-free,
into the prepared trench using suitable
equipment. The tank is filled with 1/3
water before filling in the tank surrounding.
Afterwards the surrounding (roundgrain
gravel, max. grain size 8/16) is then filled
in layers of max. 30 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.
5.5 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.
Sewe
r
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8 /
5. Installation and assembly
5.3.4 Connection of several tanks
Two or more tanks are connected via the assembly surfaces by means of GRAF special seals 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 at least
200 mm into the tanks.
5.4 Insertion and filling
The tanks must be inserted, impact-free,
into the prepared trench using suitable
equipment. The tank is filled with 1/3
water before filling in the tank surrounding.
Afterwards the surrounding (roundgrain
gravel, max. grain size 8/16) is then filled
in layers of max. 30 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.
5.5 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.
Sewe
r
www.graf.info
8 /
5. Installation and assembly
5.3.4 Connection of several tanks
Two or more tanks are connected via the assembly surfaces by means of GRAF special seals 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 at least
200 mm into the tanks.
5.4 Insertion and filling
The tanks must be inserted, impact-free,
into the prepared trench using suitable
equipment. The tank is filled with 1/3
water before filling in the tank surrounding.
Afterwards the surrounding (roundgrain
gravel, max. grain size 8/16) is then filled
in layers of max. 30 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.
5.5 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.
Sewe
r
Drainage
solution
„B“
„A“
„A“ „B“
. ASSEMBLING THE TANK DOME & TELESCOPIC DOME SHAFT
Graf UK Ltd
5.1 Assembling the tank dome
Prior to assembly, the enclosed seal is inserted into the
tank domes’ groove ‘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’ is
correctly installed.
5.2 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 generously 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.
5.3 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. Damage 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!
5.4 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 supported with concrete (load class B25 = 250
k/m2). The layer of concrete to be installed must be at
least 300 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. 1200 mm possible with intermediate section).
Attention: It is essential to use the cast telescopic dome
shaft (with class B cast cover).
5ASSEMBLING THE TANK DOME & TELESCOPIC DOME SHAFT
„A“ „B“
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9 /
6. Assembling the tank dome and telescopic dome shaft
„B“
„A“
„A“ „B“
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9 /
6. Assembling the tank dome and telescopic dome shaft
„B“
„A“
„A“ „B“
www.graf.info
9 /
6. Assembling the tank dome and telescopic dome shaft
„B“
„A“
„A“ „B“
AABB
AA
BB
Graf UK Ltd
. ASSEMBLING THE TANK DOME & TELESCOPIC DOME SHAFT
5.5 Assembling the extension
For larger coverage heights an extension is needed. To insert the extension into the tank dome, soft soap is needed.
Into the highest groove of the extension the profile seal is inserted an greased generously. Afterwards push the
telescopic dome shaft into the extension and adapt it to the planned area surface.
1 Extension = max. earth-cover 1200 mm (in each case in connection with the telescopic dome shaft)
Telescopic dome shaft (can be inclined by 5°)
Extension
Tank dome (can be rotated by 360°)
www.graf.info
0 /
6. Assembling the tank dome and telescopic dome shaft
6.5 Truck telescopic dome shaft
On installation under areas used by trucks with a maximum
weight of 12 t, the telescope cis supported as described in
point 6.4. The concrete rings h(Ø 600 mm) and a cast frame
gwith star-shaped load distribution for mounting the cast cover
are then installed (observe earth coverage of at least 800 mm,
max. 1800 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 extension
For larger coverage heights an extension is needed. To insert the
extension into the tank dome, soft soap is needed. Into the highest
groove of the extension the profile seal is inserted an greased
generously. Afterwards push the telescopic dome shaft into the
extension and adapt it to the planned area surface.
1 Extension = max. earth-cover 1800 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:
xDrain the tank completely
xClean surfaces and internal parts with water
xRemove all dirt from the tank
xCheck that all internal parts are firmly seated.
cTelescopic dome shaft (can be inclined by 5°)
dExtension
eTank dome (can be rotated by 360°)
www.graf.info
2020-08
Groove for
profile seal
440-640mm
550mm
305mm
745-945mm 990-1190mm
Invert Level with Universal 3 Internal Filter
*Telescopic Lid *Telescopic Lid *Telescopic Lid
*Maxi Dome *305mm Extension Sleeve *550mm Extension Sleeve
*Maxi Dome *Maxi Dome
5ASSEMBLING THE TANK DOME & TELESCOPIC DOME SHAFT
Graf UK Ltd
. CARATS GARDEN COMFORT PACKAGE
CARATS GARDEN COMFORT PACKAGE
The simple garden solution with submersible pump system
Ground
First
RWP inlet pipe
Power cable for the submersible
pump installed within a 50/100mm
diameter electrical service duct Rainwater level
Submersible pump
Below ground
Rainwater
Harvesting Tank.
External Hose Connection Box
for rainwater extraction (optional)
Internal Hose Connection Box
for rainwater extraction (optional)
Universal Filter 3 Internal
Fused Spur
13amp, 220-240V supply
(provided by others)
Junction Box
(provided by others)
Calmed Inlet
Overflow Siphon
To soakaway
6.1 Scope of supply
Underground tank (choice of tanks available, sizes
vary according to property type)
Telescopic lid (choice of telescopic lid available,
depending on tank location)
Filter (Basket filter supplied in accordance with type
of tank)
Submersible pump with floating water intake
Internal hose connection box
External hose connection box
6.2 Supplied by others
100mm diameter duct pipe to contain; power cable
for pump
100mm diameter drainage pipe connected from
downpipes to the inlet at the top of the tank (all
downpipes brought into one pipe for connection to
the filter)
100mm diameter pipe for overflow from the tank to
mains drainage network or soakaway
6.3 Schematic drawing of Graf Garden Comfort System6.3 Schematic drawing of Graf Garden Comfort System
6
Graf UK Ltd
. GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
info@graf.info
www.graf.info
8 / 18
1. General notes
1.1 Security
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. Relevant 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 rendered
inoperable and secured to prevent unauthorised reactivation.
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
The water in these systems is not suitable for consumption or personal hygiene.
All pipe work and outlets of the water systems are to be labelled with the words “Not drinking water”
either in words or graphically (German norm DIN 1988 Part 2, paragraph 3.3.2.) so that after years of use,
an accidental connection to the drinking water system is prevented. Even when correctly labelled it may
possibly be mistaken, for example by children. For this reason, all the outlets of the systems process
water must be fitted with child safe valves.
2. Scope of supply main components
x Submerged and suction pump Integra INOX
x Floating water extraction unit
x Water plug socket
Version Extern / Version Intern
x Pressure hose 10 m
info@graf.info
www.graf.info
8 / 18
1. General notes
1.1 Security
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. Relevant 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 rendered
inoperable and secured to prevent unauthorised reactivation.
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
The water in these systems is not suitable for consumption or personal hygiene.
All pipe work and outlets of the water systems are to be labelled with the words “Not drinking water”
either in words or graphically (German norm DIN 1988 Part 2, paragraph 3.3.2.) so that after years of use,
an accidental connection to the drinking water system is prevented. Even when correctly labelled it may
possibly be mistaken, for example by children. For this reason, all the outlets of the systems process
water must be fitted with child safe valves.
2. Scope of supply main components
x Submerged and suction pump Integra INOX
x Floating water extraction unit
x Water plug socket
Version Extern / Version Intern
x Pressure hose 10 m
7GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
Submerged and suction pump
Floating water extraction unit
Water plug socket - Version Extern / Version Intern
m roll of HDPE pipe, mm diameter, black/green, labelled as Rainwater
7.2 Rainwater storage tank Carat / set up of internal and external hose connection box
Caution: The distance between the external hose connection box and the underground tank is limited by the pressure hose
– length of the pressure hose is m. This is the standard length in the supply, more hose can be supplied on request.
1. Submersible pump
2. Brass hose screwing
3. Hose clip
4. Suction hose
5. Floating suction set
6. mm compression elbow (optional fitting used for
external tap connection
7. Fixing set for submersible pump
8. Pressure hose, black & green colour,
length m
9. Electricity supply, length m, 3-core cable
10. Water plug socket external
11. 3/4” tank connector
12. -way regulating plug
13. Hose-lock connector
14. Internal hose connection box, located on manhole
cover of rainwater tank
15. mm compression T-fitting
16. mm compression x 3/4” female threaded fitting
17. mm compression x ” male threaded fitting
18. m length of braided hose, 3/4” male x 3/4” female
connections
7.1 Scope of supply main components
Graf UK Ltd
. GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
7GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
7.3 Installation of internal hose connection box
Graf UK Ltd
7GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
7.3 Installation of internal hose connection box (continued)
. GARDEN SUBMERGE SET INSTALLATION OF TECHNICAL PARTS
Graf UK Ltd
8UNIVERSALFILTER PACKAGE
Universal-Filter 3 intern –Anschluss DN 100
485
466
122
570
DN 100
Ø500
Universal-Filter 3 XL intern –Anschluss DN 150
485
484
97
535
DN 150
Ø500
Universal-Filter 3 internal - Connection DN 100
Universal-Filter 3 XL internal - Connection DN 150
. UNIVERSAL FILTER PACKAGE
8.1 Technical data
Graf UK Ltd
. UNIVERSALFILTER PACKAGE
mail@graf.info
www.graf.info
13 / 26
6. Assembly and installation of the Universal-Filter 3 internal
6.1 Filter preparation
Before the installation in the tank, the filter must be prepared as shown in the adjacent depiction.
Length of the HT/canalisation pipe –connections (completed on site) from the filter to the inflow pot:
Carat volume
(liter)
Universal-Filter 3
Connection DN 100*
Universal-Filter 3 XL Con-
nection DN 150*
2.700
1274 mm
1308 mm
3.750
1454 mm
1498 mm
4.800
1684 mm
1728 mm
6.500
1974 mm
2008 mm
8.500
1957 mm
1991 mm
10.000
2157 mm
2191 mm
from 16.000
2417 mm
2451 mm
* (+ / - 10 mm)
6.2 Preparation on the tank
The siphon is installed in the lowest seal (3) of the tank dome.
The inlet pipe is mounted on the side opening (1) the pipe is
inserted from the outside. The emergency overflow (2) is in-
stalled above the siphon (3) and is installed by pushing through
from the inside.
Important: The sealing ring from the HT –pipe coupling of the
emergency overflow (2) must be removed.
6.3 Installing the Filter
The fixing collar is pushed over the inlet pipe that is mounted on the
tanks’ dome. Finally the prepared filter assembly is placed into the
tank dome from above then connected with the emergency overflow
and inlet pipe using the fixing collar. In this case it is a butt joint that
requires no collar.
6.4 Assembly of the extraction mechanism
Remove the seal from the filter basket and push the metal angle of the
lift out mechanism over the rim as shown in the picture.
Finally place the seal over the rim and pull back the metal angle.
8UNIVERSALFILTER PACKAGE
8.2.2 Filter preparation
Before the installation in the tank, the filter must be
prepared as shown in the adjacent depiction.
Length of the HT/canalisation pipe – connections
(completed on site) from the filter to the inflow pot:
8.2.3 Preparation on the tank
The siphon is installed in the lowest seal of the tank
dome. The inlet pipe is mounted on the side opening
the pipe is inserted from the outside. The emergency
overflow is installed above the siphon and is
installed by pushing through from the inside.
Important: The sealing ring from the HT – pipe coupling of
the emergency overflow must be removed.
8.2.4 Installing the Filter
The fixing collar is pushed over the inlet pipe that is
mounted on the tanks’ dome. Finally the prepared filter
assembly is placed into the tank dome from above then
connected with the emergency overflow and inlet pipe
using the fixing collar. In this case it is a butt joint that
requires no collar.
Carat volume (litre) Universal-Filter 3
Connection DN 100*
Universal-Filter 3 XL Con-
nection DN 150*
2700 1274 mm 1308 mm
3750 1454 mm 1498 mm
4800 1684 mm 1728 mm
6500 1974 mm 2008 mm
8500 1957 mm 1991 mm
10000 2157 mm 2191 mm
from 16000 2417 mm 2451 mm
* (+ / - 10 mm)
mail@graf.info
www.graf.info
13 / 26
6. Assembly and installation of the Universal-Filter 3 internal
6.1 Filter preparation
Before the installation in the tank, the filter must be prepared as shown in the adjacent depiction.
Length of the HT/canalisation pipe –connections (completed on site) from the filter to the inflow pot:
Carat volume
(liter)
Universal-Filter 3
Connection DN 100*
Universal-Filter 3 XL Con-
nection DN 150*
2.700
1274 mm
1308 mm
3.750
1454 mm
1498 mm
4.800
1684 mm
1728 mm
6.500
1974 mm
2008 mm
8.500
1957 mm
1991 mm
10.000
2157 mm
2191 mm
from 16.000
2417 mm
2451 mm
* (+ / - 10 mm)
6.2 Preparation on the tank
The siphon is installed in the lowest seal (3) of the tank dome.
The inlet pipe is mounted on the side opening (1) the pipe is
inserted from the outside. The emergency overflow (2) is in-
stalled above the siphon (3) and is installed by pushing through
from the inside.
Important: The sealing ring from the HT –pipe coupling of the
emergency overflow (2) must be removed.
6.3 Installing the Filter
The fixing collar is pushed over the inlet pipe that is mounted on the
tanks’ dome. Finally the prepared filter assembly is placed into the
tank dome from above then connected with the emergency overflow
and inlet pipe using the fixing collar. In this case it is a butt joint that
requires no collar.
6.4 Assembly of the extraction mechanism
Remove the seal from the filter basket and push the metal angle of the
lift out mechanism over the rim as shown in the picture.
Finally place the seal over the rim and pull back the metal angle.
mail@graf.info
www.graf.info
13 / 26
6. Assembly and installation of the Universal-Filter 3 internal
6.1 Filter preparation
Before the installation in the tank, the filter must be prepared as shown in the adjacent depiction.
Length of the HT/canalisation pipe –connections (completed on site) from the filter to the inflow pot:
Carat volume
(liter)
Universal-Filter 3
Connection DN 100*
Universal-Filter 3 XL Con-
nection DN 150*
2.700
1274 mm
1308 mm
3.750
1454 mm
1498 mm
4.800
1684 mm
1728 mm
6.500
1974 mm
2008 mm
8.500
1957 mm
1991 mm
10.000
2157 mm
2191 mm
from 16.000
2417 mm
2451 mm
* (+ / - 10 mm)
6.2 Preparation on the tank
The siphon is installed in the lowest seal (3) of the tank dome.
The inlet pipe is mounted on the side opening (1) the pipe is
inserted from the outside. The emergency overflow (2) is in-
stalled above the siphon (3) and is installed by pushing through
from the inside.
Important: The sealing ring from the HT –pipe coupling of the
emergency overflow (2) must be removed.
6.3 Installing the Filter
The fixing collar is pushed over the inlet pipe that is mounted on the
tanks’ dome. Finally the prepared filter assembly is placed into the
tank dome from above then connected with the emergency overflow
and inlet pipe using the fixing collar. In this case it is a butt joint that
requires no collar.
6.4 Assembly of the extraction mechanism
Remove the seal from the filter basket and push the metal angle of the
lift out mechanism over the rim as shown in the picture.
Finally place the seal over the rim and pull back the metal angle.
8.2 Assembly & installation of the Universal-Filter 3 Internal
8.2.1 Universal Filter 3 internal DN 100 / Universal Filter 3 XL internal DN 150
• The filter is suitable for installation in a pilot shaft or in a cistern.
• The dierence in height between the supply pipe and outlet is 275mm
• The filter may not be installed directly in the earth.
• Roof areas provided with a pipe connection of DN 100 = 350m2and for DN 150 = 500m2
Graf UK Ltd
9COMMISSIONING & SERVICE
Before commissioning and at every inspection, the lifting out mechanism must be positioned at 90° to the inlet so
that no large objects such as leaves and twigs can catch on the handle. The straining filter is re-moved for cleaning
and the basket must be thoroughly cleaned with water until all the pores are open. It is advised to clean every 4 to 5
weeks (more often in autumn due to more leaves and twigs) or according to requirements.
The filter strainer basket must be lightly pressed into place taking care that the seal sits precisely after every
cleaning.
At the occasion of each inspection, the overflow siphon must be checked and flushed in necessary.
8.2.5 Assembly of the extraction mechanism
Remove the seal from the filter basket and push the metal
angle of the lift out mechanism over the rim as shown in
the picture.
Finally place the seal over the rim and pull back the metal
angle.
8UNIVERSALFILTER PACKAGE
. COMMISSIONING & SERVICE
8.2 Assembly & installation of the Universal-Filter 3 Internal (continued)
Graf UK Ltd
. INSTALLATION & MAINTENANCE INSTRUCTIONS FOR THE GRAF RAINWATER HARVESTING SYSTEM
10 INSTALLATION AND MAINTENANCE INSTRUCTIONS FOR THE GRAF RAINWATER
HARVESTING SYSTEM
The system must be checked for leaks, cleanliness and stability at least every year.
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.
The points described in these instructions must be observed under all
circumstances. All warranty rights are invalidated in the event of non-observance.
Separate installation instructions are enclosed in the transportation packaging for
all additional articles purchased from GRAF.
The components must be checked for any damage prior to installation under all
circumstances.
Missing instructions can be downloaded on www.graf.info or can be requested
from GRAF.
Graf UK Ltd
. NOTES
12 NOTES
Graf UK Ltd
Regen House
Beaumont Road
Banbury
Oxfordshire OX16 1RH
T: 01608 661500
F: 01295 211333
www.grafuk.co.uk
Graf UK Ltd (Scotland)
220 Blairtummock Road
Queenslie Industrial Estate
Glasgow
G33 4ED
T: 0141 465 1540
F: 01295 211333
E: [email protected]o.uk
www.grafuk.co.uk
RAINWATER HARVESTING
WASTEWATER MANAGEMENT
STORMWATER MANAGEMENT
WATER BUTTS & COMPOSTERS
MULTIPURPOSE CONTAINERS
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