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Make your life easier with the Platine rainwater storage tank, the simplest to install on the market for underground tanks.
This free water resource will save you considerable money, in addition to benefiting the environment.
If you equip your tank with a filtration system, you can even wash your clothes, use it for your toilets, or wash your car in addition to watering your garden.
Features
Tank volume: 1500 L
Ref.: 390000
Weight: 80 kg
Length: 2100 mm
Width: 1250 mm
Height: 700 mm
Total height: 1015 mm
Choosing the right rainwater harvesting tank
To receive free assistance in choosing your installation, our team is at your side.
Fill out this information form and we will get back to you within 24 hours.
Discover the Extra Flat Platinum Rainwater Tank from GRAF
Volume adapted to your needs
With the extra-flat Platine tank model, gain greater autonomy in your water consumption: this tank model offers a capacity of 1.5 m³ to 7.5 m³ (1500 litres to 7500 litres).
Lightweight tank: a weight that makes life easier
Handle it with ease! Extremely lightweight, weighing between 82 and 380 kg, it saves 2,000 to 4,000 kg compared to a concrete tank. Thanks to its low weight, you can carry it by hand with 2 to 6 people or with a small construction vehicle.
Simple control and cleaning
Checking and cleaning your flat tank has never been easier. The Platine tank features a 600 mm manhole and a smooth internal wall for easy cleaning and inspection.
Tank of guaranteed quality
Its 30-year warranty offers you peace of mind over time. Therefore, we recommend that you carefully follow the installation instructions.
Economical tank for installation
You save valuable time and money during installation. Its biggest advantage? Its ultra-slim design and maximum burial depth of less than 1.70 meters. You'll achieve 80% less excavation compared to a cylindrical tank.
For a water resource available all year round
Practical, economical, adaptable to needs and ecological, the Platine Extra Flat rainwater harvester is the ultimate comfort tank.
It allows you to benefit from water all year round for your domestic uses such as washing your clothes, avoiding the use of drinking water for your toilets and being able to water your garden with filtered and untreated water.
By storing rainwater, you can potentially circumvent local watering bans or car restrictions. This allows you to move towards greater self-sufficiency by storing it without it seeping into the ground.
Good to know and plan for
- For maximum comfort, we offer a full range of Garden, Home, and Accessory Kits specifically designed for this tank as optional extras. These can be ordered separately from the tank (as listed in the drop-down menu) or are available as a complete kit in the dedicated categories on our website.
- Larger volumes (10 or 15 m³) are available with the Platine XL model or by combining 2 tanks of the same volume.
- Plan carefully for the unloading of the tank when it arrives at your home.
- If you require pre-drilling of the tanks in a location other than those specified (see documentation), it is important to inform us.sea.
- Vehicle access is possible with the appropriate cover (a dedicated cast iron riser must be provided and the burial instructions in the technical specifications must be followed).
Installation of the Platine Extra Flat tank:

80% less excavation compared to a cylindrical tank
(Compared to a vertical cylindrical tank of 3000 litres (height 1.90 m - diameter 2.20 m).)
That's about 150 fewer wheelbarrows to remove!
The calculation of the excavation volume takes into account a 10 cm bedding layer, a 50 cm space around the tank and a 45° slope.
Platinum 3000L

Reduced burial depth:
minimum space between the walls of the tank and the pit
Excavation: approx. 7.6 m3
3000L cylindrical tank

Excavation: approx. 49 m3 *
GRAF tanks are the result of over 45 years of expertise.
For an optimal user experience and to guarantee you the best performance from your rainwater tank, its design has been specifically planned to:
- to facilitate its access to control, cleaning
- to provide a demanding quality of its plastic dedicated to the strength of the tank.
Designed with meticulous care, the Platine tank is durable, lightweight, eco-friendly, economical, and virtually invisible, as it is buried underground. It will provide you with optimal ease of use and installation.
To help you determine the right size for your flat tank, check out our article and the link to a customizable calculator. With just a few clicks, you can calculate the number of liters needed to collect the appropriate volume of rainwater for your needs and region.
Frequently asked questions about the Graf Platine tank
► What is the delivery price?
To find out the shipping cost, the easiest way is to add the products to your cart and then go to the next page to review its contents. Delivery details are provided there. You can then proceed to the next page, fill in the required fields, and save your cart as a quote.
For mainland France, delivery is free (subject to change as of September 27, 2022). For other countries, please specify the destination to determine the corresponding price. We also deliver throughout Europe and Switzerland.
► How does the tank unloading process work?
It is the end customer's responsibility to provide the lifting equipment to unload the product from the truck. The product remains your responsibility, as with all tanker unloadings.
► What accessories are available?
Pump, filter, water treatment: find all the complementary products on our website.
- Optional
- 1500 L
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