Graf PLATIN User manual

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SHALLOW EXCAVATION

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Installation and maintenance instructions for
GRAF PLATIN Underground Rainwater Tank & Minimax Filter
5,000L
3,000L
1,500L
_______
5,000L
3,000L
1,500L
_______
Platin Tank &
Minimax Filter
Packages
Pedestrian
or Vehicle
______________
Platin Tank Only
Packages
Pedestrian
or Vehicle
The Graf Platin is suitable for
below ground installation.
The points described in these
instructions must be observed
under all circumstances.
All warranty rights are invalidated
in the event of non-observance.
The tank must be checked for any
damage prior to insertion into the
trench under all circumstances.
Complies with AS/NZ 4766
Platin Manufactuer:
Certified to Quality standard ISO9001-
2008 and AS/NZS 4766-2006
Table of contents
1. INTRODUCTION 3
1.1 –1.5 GENERAL NOTES ON SAFETY & MAINTENANCE 4
2. INSTALLATION CONDITIONS 5
3. TECHNICAL DATA 6
4. TANK ASSEMBLY 6
5. INSTALLATION AND ASSEMBLY 7
5.1 Construction site 7
5.20 –5.25 Trench, Ground water, Connecting several
tanks 7-8
5.3 Insertion and filling 9
5.4 Plumbing connections 9
6. ASSEMBLING THE AND TELESCOPIC DOME SHAFT 10
6.1 Assembling the telescopic dome shaft 10
6.2 Telescopic dome shaft on which persons may
walk 10
6.3 Telescopic dome shaft over which passenger
cars may drive 10
7. ASSEMBLY OF THE EXTENSION RISER 11
7.1 Assembling the adapter 11
8. INSPECTION AND SERVICING 11
9. MINMAX FILTER PACKAGE INSTALLATION 12 -13
10. PICTORIAL INSTALLATION GUIDELINES 14 - 15
10.1 Installer support service
11. STORMWATER DETENTION/RETENTION 16 - 17

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1. General notes
1.1 Safety
As Occupational Health and Safety legislation differs in each state and territory, it is necessary to refer to
all relevant Occupational Health and Safety legislation, regulations and Australian Standards in your state
or territory at all times during installation, assembly, servicing and repair of the Graf Platin rainwater
storage tank systems.
Current statutory regulations and all relevant Australian standards shall be taken into consideration at all
times. The system and any of its individual parts must be installed by a licensed person. Installation by a
nonlicensed person may void warranty.
The entire system must be shut down before any maintenance can be undertaken. Once any
maintenance is completed the tank must be properly sealed/locked by means provided with the tank to
prevent future unauthorized entry.
Graf offers a wide range of accessories which all match each other. The use of non Graf accessories may
lead to the voiding of warranty and any subsequent claims of liability from any resulting damages.
1.2 Identification of water pipes and outlets
All service water pipes and outlets leading from the Graf water tank should be identified in accordance
with AS/NZS3500.1:2003-Section 9 and other relevant local plumbing regulations to avoid inadvertent
connection with the drinking water supply.
In order to avoid the wrong connection between the drinking water and the rain water pipe work, all
conduits and tappings of rain water have to be marked clearly with “RAINWATER” in writing and be in
accordance with local standards.
All non-drinking tank water outlets should be clearly marked “RAINWATER” and we recommend they be
installed with vandal proof taps. Depending on local laws, rain water may or may not be suitable for
human consumption and/or use for personal hygiene.
1.3 Maintenance
In the event of work needing to be carried out inside the tank, as Occupational Health and Safety
legislation differs in each state and territory, reference should be made to confined spaces legislation in
your state or territory.
1.4 Site
As Occupational Health and Safety legislation differs in each state and territory, reference should be
made to excavation and trenching legislation in your state or territory with respect to the use of excavation
equipment and relevant trenching legislation in reference to shoring, battering and depth specific
regulations.
1.5 Lifting of Tanks
Occupational Health and Safety legislation and regulations differ in your state and territory, therefore
reference should be made to your state or territory legislation when lifting, handling or moving of Graf
water tanks.
RAINWATER
Continuous green pipe marker
for pipe work less than 40mm
diameter used to identify.
Example of typical rainwater
pipe work rainwater signage.

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455-655 455-755
Teleskop-Domschacht
Mini Teleskop-Domschacht
Maxi / Guss
max. 1200
2. Installation conditions
Coverage heights with telescopic dome shaft in
green areas.
Maximum coverage heights with the maximum
two extension risers and telescopic dome shaft.
(in green areas only –not under areas used by
passenger cars)
Coverage heights with cast telescopic dome
shaft (class B) in areas used by passenger cars.
(without groundwater and stratum water)
Coverage heights with telescopic dome shaft
with cast iron lid. Maximum load of the area used
by passenger cars 3.5 tonne.
(without groundwater or stratum water)
Coverage heights on installation in groundwater
–the hatched area specifies the permissible
immersion depth for the tank.
(not under areas used by passenger cars)
Trafficable dome shaft +
telescopic cast iron lid
Mini telescopic
dome shaft
>800 <1000
>700 <1000
>800 <1200 Max.
Max.
>700 <1200
>800 <1000
max. 3,5 to
>700 <1000

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1
5
3
4
2
3. Technical data
Platin Tank with Telescopic Shaft & Lid
4. Tank Assembly
Water connector box internal (not available in Australia)
PE cover for telescopic dome shaft
Telescopic dome shaft (can be inclined by 5°)
Profile seal
Tank dome
Graf Platin Tank
1500 Litres
3000 Litres
5000 Litres
Weight
82 kg
180 kg
250 kg
L
2100 mm
2450 mm
2890 mm
W
1250 mm
2100 mm
2300 mm
H
700 mm
735 mm
950 mm
Htot*
1015 mm
1050 mm
1265 mm
Minimum Hole
Size (L x W x H)
2300 x 1450
x 1155mm
2650 x 2300
x 1190mm
3090 x 2500
x 1405mm
Htot
Htot
Maximum Height
Std Shaft & Lid
Maximum
Height Trafficable
Minimum
Height
185
H
L B
440 (Maxi)
Hges
140
Hges
600
340 (Mini) 600
185
315 265 185 185
W
Htot
Htot

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Subsoil
Telescopic dome shaft
Compacted foundation refer page 2.
Backfill Material, 7mm Minus or washed sand
fill material must be porous see page 2.
Covering layer
PLATIN Rainwater Underground Tank
Concrete layer for surfaces used by passenger
cars
ß--> angle of cut to depth of the trench
5.1 Construction site pre-check
The following points should be clarified before installation commences:
• The structural suitability of the ground (geotechnical report recommended)*
• Maximum groundwater levels which occur and drainage capability of the subsoil
• Types of load expected, for example: traffic loads
• Location of all underground services
* A geotechnical report conducted by civil testing engineers is strongly recommended to
determine the physical characteristics of the subsoil before installation/excavation commences.
For setback distance from neighbouring boundary and any buildings, please contact local council.
5.2 Trench
To ensure that sufficient 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 more
than the depth of the trench away from the structure.
If the depth of the trench is > 1250 mm an embankment must be designed according to meet all safety
standards. The construction site must be level and must guarantee sufficient load-bearing capacity.
The depth of the trench must be sized, so that the maximum earth coverage (see point 2 –installation
conditions) above the tank is not exceeded.
A layer of compacted, Type B Crushed Rock (porous round-grain gravel grain size 8/16, thickness
approx. 100 - 150 mm) is applied as the foundation. . See Page 2.
5. Installation and assembly
ß
< 300 mm
< 300 mm
< 300 mm
< 300 mm
> 100 mm
ß
--> DIN 4124
63
1425
> 100 mm
7

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H
>H
>500
5.2.1 Slope, embankment, etc.
If installation of the tank is 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)
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.
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 3.5 tonne the minimum distance
away from these surfaces is at least the depth of
the trench.
5.2.4 Connection of several tanks
When two or more tanks are to be connected
together this is done by joining the tanks together
by using the GRAF Platin Interconnect Tank Seal
(Red) and basic 100mm PVC pipes (to be provided
by the installer at the construction site).
The connecting holes must be pre cut using “only”the special GRAF 124mm hole saw. The distance
between the tanks must be a minimum 500mm. The pipes must project at least 100mm inside the tanks.
Note: Connected tanks must be ordered with the Pre Drilled Holes and interconnecting tank seal.
Use 40mm pressure pipe (or equivalent approved pipe) for airline between tanks.
5. Installation and assembly
>800 <1200 Max.
Max.
1500L -> 700mm / 3000L -> 735mm / 5000L -> 950mm
>700 <1200

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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
to be 1/3 filled with water before undertaking
any backfilling.
Ensure minimum distances between trench
wall (100mm) and between tanks (500mm).
Once sufficient water is in the tank the
surrounding trench is then filled with 7mm
Minus in layers of 30 cm steps and is
manually compacted. See page 2.
The individual layers as well as the
anti floatation holes (see pictures to the right)
must be well-compacted by manual tamper.
Damage to the tank must be avoided during
compaction. Mechanical compaction
machines must not be used under any
circumstances.
Note: The surrounding trench must be a
minimum 100mm wider on all sides than
then the tank.
5.4 Plumbing connections
All feed and overflow pipes must be plumbed
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 the public storm water,
this must be protected against reflux by means
of a Reflux Valve refer AS/NZS3500.1:2003
All suction, pressure and control lines must be
routed inside 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 45° moulded sections.
Important: The empty pipe must be connected to an aperture above the maximum water level.
5. Installation and assembly
2. 3/3
>100
1. 1/3
Kanal
>1%
>1%
Storm water

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1
3
2
2
4
1
3
6. Assembling the and telescopic dome shaft
6.1 Assembling the telescopic dome shaft
The telescopic dome shaft enables infinite adaptation of the tank
to given site surfaces with earth coverage of between 455mm
and 655mm (standard telescopic dome shaft) or 455mm and
755mm (trafficable 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 the soft soap supplied (do not use
mineral oil-based lubricants, as these attacks the seal). The
telescope is then also lubricated, inserted and aligned with the
surface of the site.
6.2 Telescopic dome shaft on which persons may walk
Important: To prevent loads from being transferred onto the
tank, (7mm Minus) is filled 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 and tightened to prevent entry by
children.
6.3 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 grey) must be supported
with concrete (load class B25 = 250 kg/m²). The layer of
concrete to be installed must be at least 300 mm wide and
approx. 200 mm high all around. The permitted coverage
above the shoulder of the tank is min. 700 mm and max.
1000mm.
Attention: Use the cast cover under all circumstances.
„A“
„A“

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7. Assembly of the extension riser
7.1 Assembling the extension riser
For larger coverage heights an extension riser is needed. Insert the extension riser into the tank dome,
(soft soap is needed) then into the highest groove of the extension riser inserted the profile seal and soap
generously. Afterwards push the telescopic dome shaft into the extension riser and adjust it to the
planned area surface.
1 Extension Riser = max. earth-cover 955 mm (with standard lid and shaft)
respectively 1055 mm (with vehicle lid and shaft)
8. 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°)
Extension Riser
Profile seal
Platin Tank dome

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9. Minimax Filter Package Installation
10. Inspection and servicing
9.1. Minimax Internal Filter
• The Filter Package is supplied with Filter Body, Filter Basket,
Spray Cleaner, Two Spannfix Collars, Emergency Overflow Siphon,
Rodent Guard, Settled Inlet Connection, One 150mm Rubber Ring
Adaptor and One 250mm Rubber Ring Adaptor
•The filter has a built in difference between inflow/outflow of 10mm.
• The filter is suitable for roof areas up to 350 square metres.
• The mesh width in the sieve insert is 0.35mm.
9.2. Technical Specifications
9.3 Installation of inflow pipe and overflow siphon
The emergency overflow siphon (pictured at top on page on the left and on Page 13) is installed at 90
degrees to the inlet and outlets of the tank; the Rodent Guard is inserted in the opening of the trap.
9.4 Filter Installation
Connect the filter body into the bell end of 100 mm PVC pipe. Having already cut the pipe to the required
length connect it with the inlet stilling system ensuring it is firmly in place.
Flow
Overflow Siphon/Skimmer

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9.5 Insert the filter cartridge into the tank
Insert the filter, prepared with the inflow pipe and the inlet stilling system, into the tank. Fix the filter into
place using both rubber ring adaptors facing outwards from the dome with the 250mm adaptor on the inlet
and the 150mm adaptor on the outlet. These adaptors “butt” up against the filter body and are joined by
the Graf Spannfix collars (supplied). They provide a simple disconnection of the filter body without tools.
To position the Minimax Filter correctly - push the 150mm rubber ring adaptor on the outlet, fully in, by
doing this you will be positioning the inlet stilling system so it sits in between the tank bottom ribs. See
picture below.
9.6. Commissioning
Before installing the filter, please remove the rubber seals and clean the filter sieve in a dishwasher (40˚ -
max. 60˚). At the time of commissioning re-remove the filter sieve and check its cleanliness, it is
important to clean any dirt/debris that may have entered the filter.
Due to the designed structure, the filter sieve functions only in one flow direction the direction is marked
on the metal ring with an arrow on the inlet side.
When installing the filter cartridge pay attention that the joint seam of the sieve surface is positioned
upward.
9.7. Regular Maintenance
To ensure maximum water yield, the filter must be checked for dirt and debris immediately following the
first rainfall occurrence after the tank installation. It must also be checked after any "major" rainfall event
and/or after any long dry spells.
The complete system is to be inspected at least every 3 months for leakage, cleanliness and stability. To
ensure the expected water yield is delivered, it is important to inspect and clean the filter sieve at regular
intervals. The Spray Cleaner when connected provides additional insurance against filter blockage; it can
be plumbed up to the tank rainwater pump line. Depending on the connection it can be operated
manually by use of an external ball valve or automatically by the installation of a timer and solenoid valve.
When carrying out a service of the integrated filter it is also required that the overflow siphon is checked
and cleaned.
Correct Installation of Graf Minimax Filter Package
9. Minimax Filter Package Installation cont...
To Storm Water
When installing the filter cartridge pay attention that the joint seam of the sieve surface is
positioned upward.

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9
10. Pictorial Installation of the Graf Platin Tank
inimax Filter Package Installation cont...
1. Dig excavation and provide 100-
150mm well compacted level base
2. Lift tank/s off truck using suitable lifting
equipment
3. Use digger to lift tank/s into the hole
4. Back fill must be compactable porous with
a maximum size of 7mm
5. Install geotextile cloth over tank and ditch
and up to ground level if ground water could
be above the shoulder of the tank.
6. Connect plumbing, 1/3 fill tank with water
and then back fill

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Reece has available Plumbing Product Specialists in each state to support installing contractors as
required with advice on installation of Graf Tanks & Filters. Contact your local Reece Branch for
assistance.
7. Insert tank seal and plumbing connection
fittings
8. Connect Minimax Filter Package
(see instructions pages 12-13)
9. Lube up rubber seal with liquid soap provided
before inserting Shaft & Lid
10. Install Graf Telescopic Shaft & Lid
(man hole) to tank and complete
landscaping
10. Pictorial Installation Guidelines of Graf Platin Tank cont....
10.1 Installer Support Service

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11. max Filter Package Installation
11. Storm Water Detention/Retention
Due to its shallow excavation and strong construction, the Graf Platin underground tank it is
ideally suited as either a detention tank or a detention/retention tank.
11.1 Detention Tank (Detain)
A detention tank is required by many councils and local authorities to capture and hold rainwater on the
property and then slowly release it back into the storm water system to ensure flash flooding of
stormwater drains does not occur. The council or authority will normally nominate the amount of water to
be detained and the flow rate of the release of this water back into the storm water system.
11.2 Detention/Retention Tank (Detain & Retain)
With a national focus on water savings by collecting rainwater the installation of a detention/retention
coupled with a quality filtration system enables clean quality rainwater to be collected in the Graf Platin
Tank.
Sized and set up correctly the tank will detain a specific amount of water required by the council before
letting it go slowly back into the storm water system. It will also provide the retention of a suitable amount
of rainwater for use by the property owner. Thus replacing the need to buy an additional rainwater tank.
The property owner can use this retained water for such purposes as flushing toilets, filling washing
machines and watering gardens.
Typical Installation of Platin as a Storm Water Detention/Retention System
11.3 One 5,000L Detention/Retention Tank
Storm Water Detention/Retention

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11.4 Two 5,000L Tanks Detention/Retention System
11.5 Height of Detention Outlet
Storm Water Detention/Retention

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