Rainwater retention and related systems are becoming increasingly important. The aim of these systems is to retain the rainwater and release it into the sewage system or to infiltrate it to the soil with a time delay. In this way, flood peaks can be cushioned. This relieves the public sewer system, especially during heavy rainfall. Especially in highly populated areas, the authorities often demand rainwater retention.
The ACO Rain4me tanks and cisterns can be used with the retention throttle for rainwater retention. The drainage throttle is installed in the tank to regulate the amount of rainwater that is directed to the public sewer.
In addition, a desired amount of rainwater can be retained on the property to supply house and garden.
The retention throttle ensures a regular and predefined outflow. The drainage rate of the throttle can be set from 0.05 to 1.00 litre per second, depending on the requirements. It is installed at the lower edge of the tank using the circular hole saw and the rubber lip seal.
The floating ball of the retention throttle can be screwed to the inside of the dome with the help of a string, so that a certiain volume of water remains in the tank for the use in house and garden. By using rainwater, you can save up to 50 percent of drinking water.
Exemplary construction of a flat tank with 4,000 l with use as a retention and rainwater storage tank
- rainwater inlet
- retention pipe
- empty pipe for cable
Make a hole at the bottom of the tank with the circular saw for the connection of the retention throttle.
As an alternative to retention, rainwater can also be infiltrated directly on the property and, unlike retention, not be discharged into the sewer system.
If you infiltrate rainwater on your property and do not lead it into the sewer system, you can reduce public wastewater charges, and in some regions even save them altogether.
With the ACO Stormbrixx seepage kit, you support the natural water cycle: Rainwater that arrives on the roof surface of your house is collected in the ACO Rain4me rainwater harvesting system. When the flat tank is full, it is directed via the overflow to the ACO seepage kit. There it seeps away with a time delay according to the soil conditions and thus contributes to the recharge of groundwater.