INTEWA online planning aids

We offer you various online planning aids for a quick and uncomplicated solution to your individual needs.

INTEWA online planner

Here you can, by entering a little information, dimension your INTEWA product. The calculation of the required products or product elements takes place immediately.


RAINMASTER rainwater unit


PURAIN rainwater filter


AQUALOOP water treatment


DRAINMAX trench tunnel

System planning forms

We would be happy to assist you in planning your project. As soon as we have reviewed your completed planning form for your desired application, you will receive an offer. You can also send us further information, such as location and drainage plans or soil surveys, which will make it easier for us to select the optimum system.

Downloadable PDF versions

You can also download the planning sheets as PDF here:


The calculation software for engineers, architects and landscape planners is used to dimension your project for rainwater management. 

  • Design of all infiltration variants according to DWA-A 138
  • Design of rainwater retention reservoirs according to DWA-A 117
  • Evaluation of rainwater runoff according to DWA-M 153
  • Flood verification according to DIN1986-100

The RAINPLANER license can be purchased directly from the developer.

The possibility to save drinking water has enhanced strongly the last years.

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A rainwater filter cleaning itself by the principle of the hydraulic jump.

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The DRAINMAX tunnel infiltration system: The only plastic trench with flushable  ground.

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The optimized water pump station for rainwater and greywater utilization in every planned construction.

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Tel. +49 (0)241/96605-0

E-Mail: info@​intewa.​de

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