Graf Garden Comfort Platin 1500 L User manual

Document No. Graf-0004 Rev. 1
INSTALLATION MANUAL
The Platin 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 oers 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.
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. TECHNICAL DATA
Graf UK Ltd 
TECHNICAL DATA
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2.1 Technical Data Platin
(1500 L, 3000 L, 5000 L, 7500 L)
Tank 1500 litres 3000 litres 5000 litres 7500 litres
Weight 82 kg 180 kg 250 kg 380 kg
L2100 mm 2450 mm 2890 mm 3600 mm
W1250 mm 2100 mm 2300 mm 2250 mm
H700 mm 735 mm 1000 mm 1250 mm
Htot* 1015 mm 1050 mm 1315 mm 1565 mm
* Htot = total height (without telescopic dome shaft)
2.2 Overview tanks Platin
(1500 L, 3000 L, 5000 L, 7500 L)

. INSTALLATION & ASSEMBLY
Graf UK Ltd

1. Subsoil
2. Telescopic dome shaft
3. Compact foundation
4. Surrounding (round-grained gravel, maximum grain size 8/16)
5. Covering layer
6. Platin Rainwater Underground Tank
7. Concrete layer for surfaces used by passenger cars
ß––> DIN 4124 from 1250mm depth of the trench
1 4 7
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2 5
INSTALLATION & ASSEMBLY
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3.1 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. trac loads
• Please note: HGV can only be driven over if a self-supporting, steel-reinforced concrete plate is installed!
An expert ground report should be requested from the local planning authority to determine the physical
characteristics of the subsoil.
3.2 Trench
To ensure that sucient space is available for working, the base area of the trench must exceed the dimensions of
the tank by > 100 mm on each side; the distance from solid constructions must be at least 1000 mm.
If the depth of the trench is> 1250 mm an embankment must be designed according to DIN 4124. The construction
site must be horizontal and plane and must guarantee sucient 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. 100 - 150 mm) is applied as the
foundation.
3.3.2

. INSTALLATION & ASSEMBLY
Graf UK Ltd 
INSTALLATION & ASSEMBLY
3.3.1 Standard installation overview
Coverage heights with telescopic dome shaft in green
areas.
3.3.2 Maximum cover permitted over tank
Maximum coverage heights with extension and
telescopic dome shaft.
(in green areas only- not under passable areas)
3.3.3 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.
Attention: When positioning the upper half shell, it
must be ensured, under all circumstances, that the seal
does not slip out of the groove.
3.3.4 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, sucient 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.
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Tank 1500 litres 3000 litres 5000 litres 7500 litres
Immersion depth 700 mm 735 mm 1000 mm 1250 mm