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11. max Filter Package Installation
11. Storm Water Detention/Retention
Due to its shallow excavation and strong construction, the Graf Platin underground tank it is
ideally suited as either a detention tank or a detention/retention tank.
11.1 Detention Tank
(Detain)
A detention tank is required by many councils and local authorities to capture and hold rainwater on the
property and then slowly release it back into the storm water system to ensure flash flooding of
stormwater drains does not occur. The council or authority will normally nominate the amount of water to
be detained and the flow rate of the release of this water back into the storm water system.
11.2 Detention/Retention Tank
(Detain & Retain)
With a national focus on water savings by collecting rainwater the installation of a detention/retention
coupled with a quality filtration system enables clean quality rainwater to be collected in the Graf Platin
Tank.
Sized and set up correctly the tank will
detain
a specific amount of water required by the council before
letting it go slowly back into the storm water system. It will also provide the retention of a suitable amount
of rainwater for use by the property owner. Thus replacing the need to buy an additional rainwater tank.
The property owner can use this retained water for such purposes as flushing toilets, filling washing
machines and watering gardens.
Typical Installation of Platin as a Storm Water Detention/Retention System
11.3 One 5,000L Detention/Retention Tank
Storm Water Detention/Retention
