Rainwater Solutions
Every drop, captured.
From a suburban backyard to a commercial harvesting system - GRAF's rainwater platform stores, filters and delivers water on your terms.
Residential & commercial rainwater harvesting
GRAF Carat underground tank
Manufacturer product photography with system steps listed alongside
Also in this system
System steps
Rainwater harvesting system
Rainwater is collected from roof catchments, pre-filtered, stored underground and reused for irrigation, toilets and laundry.
- 1Roof and gutter catchment - rainfall collected from impervious roof area
- 2Optimax or 3P Compact Rainwater Filter - leaf and debris pre-treatment before storage
- 3GRAF Carat / Platin underground tank - sized to roof area and reuse demand
- 4Pump and controls deliver water to garden irrigation, toilets and laundry
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Our heritage
Engineering the future, built on decades of history
1962
Otto Graf GmbH founded
Otto F. Graf and Elfriede Graf found Otto Graf GmbH in Germany - plastic containers for winegrowers and industry.
1974
First GRAF rainwater butts
“Rainwater is free” - market launch of the first GRAF water butts, foundation of today’s rainwater harvesting range.
2007-2008
Carat S and Australia
Carat S supports global exports. Sales branches founded in Australia and the United Kingdom.
2014
KLARO joins the group
Otto Graf GmbH takes over Klaro GmbH after more than a decade of technology partnership in decentralised sewage.
2022
60 years of GRAF
Otto Graf GmbH celebrates 60 years; the group employs 700+ people worldwide and exports to 80+ countries.
Today
GRAF Australia
Rotomoulded manufacture in Western Australia and German-engineered systems specified for Australian sites.
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