Donut 3,000 lt

Donut Underground Water Tank

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Underground water tanks are the perfect solution for limited space applications or where you want to hide your rainwater storage.

You should consider an underground water tank for rainwater storage if:

  • you have limited space available for your water tank
  • you want to hide your rainwater tank and rainwater storage
  • you are looking for a "central storage" area that will allow you to harvest rain water from the whole of your roof


The Donut underground water tank has a capacity of 3,000 litres and is an ideal solution where there is limited space or where you want to hide your rainwater tank because:

  • it is very cost competitive when compared with other polyethylene underground water tanks
  • it is low profile and is therefore faster, easier and cheaper to install than high profile underground water tanks
  • it is a low profile underground water tank and does not require fencing or shoring of the excavated area when the excavation is less than 1500mm.
  • it is accredited to the polyethylene water tank manufacturing standard (AS4766)
  • it is accredited to the septic tank standard for the burial of water tanks underground (AS1546.1).
  • it can be installed at any stage in the building process
  • it is relatively light weight to allow for on-site movement and relatively straight forward installation
  • it can be combined easily with other Toroid underground water tanks to achieve almost any required capacity
  • it is suitable for installation in load bearing applications
  • a full range of accessories is available for the installation of the tank in single or multiple water tank installations
  • it is one of the few underground water tanks approved by Housing NSW
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