Menu

Connection types
Infiltration, Canalisation or Detention

 

Regenzisterne von Speidel wird in Grube gehoben

Solutions for rainwater disposal

By installing a cistern, you can save money on wastewater charges. This is because you are making a significant contribution to better infiltration and relieving the burden on the sewer system during heavy rainfall. But what happens when the cistern is full? There are additional infiltration systems that can be used to drain the excess rainwater into the sewer system or directly into the groundwater. You can find out which type of connection is right for you on this page.

Only infiltration trench

Potential savings
Stormwater utility fee for associated impermeable area

Advantages
Affordable design

Disadvantages
Terrain must be suitable

Recommendation
The optimal solution where there is favourable terrain, especially in Baden-Württemberg, because Infiltration through active topsoil layers requires no building permit whereas French drains need approval.

Reine Muldenversickerung

Only French drain

Potential savings
Stormwater utility fee for associated impermeable area

Advantages
Concealed infiltration

Disadvantages
Checking on the soakaway is rather more involved
Subject to approval In some German Federal States (for instance Baden-Württemberg)

Recommendation
The most common solution for medium-sized infiltration systems with good accessibility for trucks to deliver drainage gravel.

Reine Muldenversickerung

Only infiltration with dry well using gravel

Potential savings
Stormwater utility fee for associated impermeable area

Advantages
Easy to install
Soakaway can be checked

Disadvantages
Soakaway trench may need to be filled up with considerable volumes of suitable gravel.

Recommendation
The easiest and cheapest solution for medium-sized infiltration systems with good accessibility for trucks to deliver drainage gravel.

Sickerschachtversickerung

Rainwater harvesting with infiltration trench

Potential savings
Up to 50 % of household drinking water
and stormwater utility fee of associated roof area

Advantages
Easiest system to install
Lowest investment costs for infiltration

Disadvantages
Only solutions using a basket filter suitable
Terrain must be suitable

Recommendation
With favourable terrain conditions, the optimal solution with maximum possible savings. Especially in Baden-Württemberg, infiltration through active soil layers is a more reasonable solution than a French drain which requires approval.

Nutzung mit Muldenversickerung

Rainwater harvesting with French drain

Potential savings
Up to 50% of household drinking water 
and stormwater utility fee of associated roof area can be saved

Advantages
No garden area is taken up for use as a soakaway

Disadvantages
Only solutions using a basket filter suitable


Recommendation
The most common and best solution for flat plots. This version offers the maximum possible savings. The number of necessary soakaway crates depends on the roof area and soil type.

Nutzung mit Rigolenversickerung

Rainwater utilization with sewer connection

Potential savings
Up to 50 % of household drinking water
Relief on stormwater utility fee

Advantages
All filter options can be used
Easiest system to install

Disadvantages
Usually not complete exemption from stormwater fee

Recommendation
If a soakaway is not technically possible or only at great expense, then this is the optimal solution.

.

Nutzung mit Kanalanschluss

Detention cistern without useable volume and 100 % detention volume

Potential savings
Relief in the calculation of impermeable area, and thus reduction of stormwater fee.

Advantages
Lowest investment costs, since almost no tank accessories are required

Disadvantages
Not possible to make use of rainwater

Recommendation
If a detention tank is required and the rainwater cannot be or is not wished to be used, this retention option is the right one.

Retention nur Rückhaltevolumen

Detention cistern with 50 % useable volume and 50 % retention volume

Potential savings
Up to 50 % of household drinking water
Relief in the calculation of impermeable area, and thus reduction of stormwater fee.

Advantages
Advantages of rainwater harvesting and retention at the same time

Disadvantages
Only 50 % of the tank volume is available for use. A larger tank should be chosen.

Recommendation
If a detention tank is required and also rainwater is to be used, this retention option is ideal.

Retention mit Nutzvolumen

Lassen Sie lieber Wasser versickern statt Geld:

Mehr über Abwassergebühren