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

Backflow level

Backflow level

Height below which special measures against backflow of rainwater and combined sewers have to be taken. The backflow level usually corresponds to street level.

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