Closed tank extra low IISI 4000

Price from €

The height from the bottom of the tank to the drain outlet is only 75 cm.

Extra-low IISI – Closed tank for wastewater collection. The extra-low structure makes installation significantly easier, as its excavation is about half as deep as a conventional tank. The bottom of the tank is significantly closer to the ground surface and is not as easily exposed to the buoyancy stress caused by runoff and groundwater. The tank is designed specifically for demanding ground installation and is very durable.

The properties of the ultra-low IISI – Closed Tank are in a class of their own and their strength properties are still 100% present, even when the durability limits of a conventional closed tank have already been reached.

• 200%* ⁾ higher permissible groundwater level in the soil
• 50%* ⁾ lower installation trench requirement below the inlet drain
• 25%* ⁾ higher permitted soil filling on top of the tank
• permitted groundwater level below the sewer inlet connection
• large service pipes 450 and 800 mm
• Versatile input connection options and series connection option
• ultra-low and strength-optimized design
• made from the best raw materials without sparing them
• tested extensively according to the methods of the EN12566 standard
• environmentally friendly 100% recyclable raw material is also food grade

*) compared to standard 5000-5500 liter closed tanks on the market

You can recognize a good and durable closed container by

• the lower the overall structure of the closed tank, the better
• The closer the permitted groundwater level is to the sewer pipe connection, the better.
• the more fill soil allowed on top of the tank, the better
• the bigger the service pipe, the better

In comparisons and tests, all the requirements and properties of the extra-low IISI Closed Tank are met, which shows that the IISI closed tank is correctly designed to withstand various stress factors, the best available raw materials are used in its manufacture without sparing it, and its installation is easier even in demanding conditions.

The IISI 4000L closed tank can be connected in series to achieve a larger volume.