Underground Rainwater Tanks

Rainwater tanks can be used for various rainwater harvesting functions. Mainly, a rainwater tank is installed to collect and use rainwater for the house (toilet flushing), the garden (plant watering) or for initial retention during heavy rainfall, which protects our investment from flooding. The use of rainwater in rainwater tanks not only has an ecological effect, but also brings real savings for the user's wallet. It has been calculated that, with good rainwater management, it is possible to save up to 50% of tap water costs.

All rainwater tanks are subject to subsidies under the "MOJA WODA" programme as well as other local programmes "Złap deszczówkę", "Mój Deszcz" etc.

The offer also includes:

Active filters

RAINWATER TANK BOLT 1000
  • -6%

Bolt rainwater tank with filter

  • Underground rainwater tank
  • Equipped with a rainwater filter
  • Capacities from 1000 l to 3500 l
star star star star star
2 Review(s) 
Price
PLN1,266.18 Regular price PLN1,347.00
PLN1,029.41 tax excl
Lowest price: PLN1,198.83 +6%
See more
Choose options
Drop Water Rainwater Tank 2000 l
  • -7%

Drop Water Rainwater Tank

  • Underground rainwater tanks
  • Inlet/outlet DN 100-150
  • Capacity from 2000l to 5000l
star star star star star
4 Review(s) 
Price
PLN2,676.73 Regular price PLN2,878.20
PLN2,176.20 tax excl
Lowest price: PLN2,561.60 +4%
See more
Choose options
GAMA RAIN TANKS

Gama rain tanks

  • Polyethylene rainwater tanks
  • Underground rainwater tank
  • Different volume from 1000 to 3000 l
star star star star star
2 Review(s) 
Price
PLN1,177.11
PLN957.00 tax excl
See more
Choose options
Slimtank rainwater tank 2000 l
  • -5%

Slimtank rainwater tank

  • Capacity 2400l and 3500l
  • Easy installation and shallow excavation
  • Ground cover of up to 1 metre
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN4,668.30 Regular price PLN4,914.00
PLN3,795.37 tax excl
Lowest price: PLN4,218.60 +11%
See more
Choose options
Octagon rainwater tank 4000 l
  • -5%

Octagon rainwater tank

  • Octagon flat rainwater tank
  • Easy installation in difficult groundwater conditions
  • Capacity from 4,000l to 21,500l
star star star star star
1 Review(s) 
Price
PLN6,765.90 Regular price PLN7,122.00
PLN5,500.73 tax excl
Lowest price: PLN6,409.80 +6%
See more
Choose options
F-Line rainwater tank 1500 l
  • -5%

F-Line rainwater tank

  • Underground, flat rainwater tank
  • Tanks for difficult ground conditions
  • Tank volume from 1500 to 7500 l
star star star star star
2 Review(s) 
Price
PLN4,164.80 Regular price PLN4,384.00
PLN3,386.02 tax excl
Lowest price: PLN3,945.60 +6%
See more
Choose options
Neo rainwater tank 5000 l
  • -5%

Neo rainwater tank

  • Underground, flat rainwater tank
  • Monolithic tank with a 35-year warranty
  • Capacity from 1500 to 40000 litres
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN3,848.45 Regular price PLN4,051.00
PLN3,128.82 tax excl
Lowest price: PLN3,645.90 +6%
See more
Choose options
Jumbotank rainwater tank
  • -8%

Jumbotank rainwater tank

  • HDPE monolithic tank
  • Rainwater tank
  • 10,000l capacity
star star star star star
3 Review(s) 
Price
PLN9,789.72 Regular price PLN10,641.00
PLN7,959.12 tax excl
Lowest price: PLN8,938.44 +10%
See more
Choose options
AquaKing underground tank for rainwater 10000 l
  • Online only

AquaKing rainwater tank

  • Capacity 10000 l,
  • Level raiser (superstructure) and cover included,
  • Polyethylene underground tank.
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN10,579.00
PLN8,600.81 tax excl
See more
BLUELINE II TANKS
  • -5%

Blueline II rainwater tank

  • Blueline underground rainwater tank
  • Monolithic tanks with 25 years guarantee
  • Tank volume from 2600 to 10000 l
star star star star star
2 Review(s) 
Price
PLN4,736.70 Regular price PLN4,986.00
PLN3,850.98 tax excl
Lowest price: PLN4,487.40 +6%
See more
Choose options
Horizontal-Line tank 6000 l black
  • -27.48%
Black

Horizolntal-Line Water Tank Rainwater Tank

  • Underground tank for rainwater collection
  • 2 capacities to choose from: 3000 l and 6000 l and in colors: black and white
  • Made of high-quality PE polyethylene
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN3,444.00 Regular price PLN4,749.03
PLN2,800.00 tax excl
Lowest price: PLN3,687.54 -7%
See more
Choose options
Rainwater tank Try
  • -10%

Try rainwater tank HDPE

  • Underground rainwater tank made of high density polyethylene PEHD
  • Capacities from 2 m3 to 30 m3
  • Very durable three-layer construction 
star star star star star
1 Review(s) 
Price
PLN3,975.18 Regular price PLN4,416.87
PLN3,231.86 tax excl
Lowest price: PLN3,754.34 +6%
See more
Choose options
Roterra rainwater tank 10000 l

Roterra rainwater tank

  • Underground tanks for rainwater or septic tanks
  • Can be loaded with car traffic
  • Capacity from 12 to 65 m3
star_border star_border star_border star_border star_border
0 Review(s) 
See more
Choose options
BlackLine tank 5200 l
  • -5%

BlackLine tank

  • Underground tank for rainwater and sewage
  • The strongest polyethylene tank
  • Capacity: 5,200 l, 7,600 l and 10,000 l
  • The possibility of foundation in groundwater, ground covering up to 1,5 m
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN15,951.45 Regular price PLN16,791.00
PLN12,968.66 tax excl
Lowest price: PLN15,951.43 0%
See more
Choose options
MAURANO 300L anthracite tanks
  • -10%
Sand Granite Graphite

Maurano rainwater tank 300L

  • Capacity 300 l
  • Imitation of natural stone, possibility of planting flowers
  • Rainwater storage tank ideal for the terrace
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN1,323.90 Regular price PLN1,471.00
PLN1,076.34 tax excl
Lowest price: PLN1,323.90 0%
See more
Choose options
Evergreen rainwater tank 475L
  • -10%

Evergreen rainwater tank 475L

  • Decorative rainwater tank in the garden
  • Ground tank with a volume of 475L polyethylene
  • Look like the trunk of an old oak, color walnut
star star star star star
1 Review(s) 
Price
PLN1,247.40 Regular price PLN1,386.00
PLN1,014.15 tax excl
Lowest price: PLN1,316.70 -5%
See more
Choose options
Evergreen Lite 300L rainwater tank
  • -10%

Evergreen Lite 300L rainwater tank

  • Under gutter rainwater tank in the garden
  • Decorative tank with a volume of 300L
  • Styled on the narrow trunk of an old oak
star_border star_border star_border star_border star_border
0 Review(s) 
Price
PLN1,120.50 Regular price PLN1,245.00
PLN910.98 tax excl
Lowest price: PLN1,182.75 -5%
See more
Choose options
RAINWATER STORAGE TANK HELENA 300L
  • -10%
Terracotta

Rainwater tank Helena 300L

  • Polyethylene tank in light brick colour
  • The tank with a volume of 300L
  • Look like a Mediterranean amphorae
star star star star star
1 Review(s) 
Price
PLN1,120.50 Regular price PLN1,245.00
PLN910.98 tax excl
Lowest price: PLN1,120.50 0%
See more
Choose options
Showing 1 - 25 of 98 item(s)
Back to top
The tanks in our offer manufactured using the rotomoulding method (monolithic construction of the tank), which makes the tanks highly resistant and ensures 100% tightness (no seams, welding, twisting of modules). Selected tanks can even be installed in areas of vehicular traffic and even trucks. The product range includes flat rainwater tanks that can be sited in heavy soil and high groundwater.

We offer tanks from renowned and proven manufacturers from Poland and abroad, which provides our customers with a wide choice at attractive prices. We invite you to contact our consultants. We provide you with professional advice on tank selection, installation and rainwater utilisation.

Selecting a rainwater storage tank

The capacity of the rainwater tank should be selected by: calculating the catchment area, adjusting the appropriate flow coefficient and taking into account the amount of rainfall in the area. This is a method to determine the possible rainwater yield, which can be useful for selecting a tank for rainwater management purposes. We welcome you to use our capacity selection calculator.

Selecting an underground tank model for rainwater management is also not straightforward, as several important parameters must be taken into account. Knowing the ground conditions (sandy, clayey, other soils) allows you to match the right type of rainwater storage tank in terms of soil pressure resistance and depth of cover. Knowing the ground water level will allow us to avoid the situation of a buried tank being pushed out in the event of high ground water levels, in which case flat tanks are recommended. It is also useful to have information on the geological parameters of the ground when designing an emergency overflow if we are in a situation where the water stored in the tank will not be used and will continue to collect during rains.

The Aquatechnika store offer is the perfect place to buy a rainwater tank. We guarantee delivery throughout Poland - Warszawa, Kraków, Wrocław, Poznań, Szczecin, Łódź, Katowice, other and foreign deliveries. In our offer you will find products of renowned world brands and Polish producers at attractive prices. The range of products includes tanks from 1000l to 75000l capacity, as well as large commercial installations on an individual request. Before making your selection, we invite you to check attractive offers and contact advisers. We offer the lowest prices and the opportunity to negotiate.

FAQ

How do I choose a rainwater tank?

The selection of a rainwater tank depends on the catchment area, watering requirements or the possibility of underground or above-ground installation. Take a look at our capacity selection calculator. We also invite you to contact our customer service.
0

Rainwater tank permit or notification?

The law is not clear-cut. According to the latest regulations, the construction of a rainwater tank with a capacity of up to 10 m3 only requires a notification. Additionally, if the tank is built during the construction of a house, it does not require a permit. Otherwise, it is necessary to contact the district office and obtain the necessary information.
0

Do tanks need to be protected with sand and cement?

This depends on the individual conditions of the plot of ground. If the tank is installed in permeable ground, a sand/cement fill is not necessary. It is necessary if the groundwater conditions are unfavourable. The purpose of the backfilling is to ensure good settlement, making the tank stable and safe. Each tank has its own properties as specified in the installation instructions. We also welcome you to contact our customer service.
0

What is the maximum depth at which the tank can be installed?

This is dependent on the particular tank model, which has specific dimensions. The depth of the placed can be increased by using suitable superstructures. You are also welcome to contact our customer service.
0

Can tanks be installed in ground water?

In most cases, tanks cannot be installed in groundwater. For this purpose, special flat tanks are dedicated, which are designed for difficult groundwater conditions, e.g. F-line, Octagon, Neo. They allow a shallow foundation due to their low profile.
0

Can the tanks be installed in drivable ground?

In most cases this cannot be done. There are specially designed heavy-duty tanks for this purpose, to which a vehicle traffic kit consisting of an ascending pipe and a steel plate is attached. Examples of such a tank are: F-line, Blueline, Octagon, Neo.
1

Can garden systems be combined with an automatic irrigation system?

Yes, of course it is possible. For this purpose, pumps with specific parameters are selected to meet the requirements of the installation. In order to select a pump for your individual use, please refer to the guide and contact our customer service.
1

Do you need to remove the pump from the tank for the winter?

This is not necessary as the tanks are installed underground - below the frost line. Below the ground surface, at the depth of the tank foundation, the water should not freeze.
1