Otto Graf GmbH
Plastic Products
Tel. +49 7641 589-0
Fax +49 7641 589-50
Carl-Zeiss-Straße 2-6
DE-79331 Teningen, Germany

Backfill material

Backfill material

For correct installation of a plastic tank, gravel (usually maximum grain size 8.16) is recommended. It is very easy to work with and, in contrast to chippings and sand, does not form cavities. In addition, gravel has a high self-supporting force and can therefore be installed loosely, i. e. without additional compaction.

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