Otto Graf GmbH
Plastic Products
Tel. +49 7641 589-0
Fax +49 7641 589-50
export@graf.info
www.graf-water.com
Carl-Zeiss-Straße 2-6
DE-79331 Teningen, Germany

The easy way to retain rainwater: GRAF detention cisterns

A detention cistern collects rainwater and discharges it into the sewer system at a controlled rate. This reduces the burden on drains during periods of peak rainfall. For controlled discharge of the rainwater the detention cistern is fitted with a flow control. This discharges water to the sewer at a rate of 0.5 to 16 litres per second. The water level in the tank rises temporarily during heavy rainfall and falls at the set rate during, and after the rain stops. GRAF detention cisterns are also equipped with an emergency overflow to prevent the tank from overflowing.


Platin detention cisterns

Detention cistern for rainwater detention and sewer relief

GRAF detention cisterns for rain detention and channel relief

Carat S detention cistern

GRAF detention cisterns for rain detention and channel relief

Carat XL underground tank detention cistern

GRAF detention cisterns for rain detention and channel relief

Carat XXL underground tank

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http://www.graf-water.com/retention/detention-cisterns.html