Residential Rainwater Tanks in NSW

Residential Rainwater Tanks

In 2004, the NSW State Government introduced the BASIX (Building Sustainability Index) legislation.


This Act was established to encourage sustainable residential development by reducing the consumption of mains-supplied potable water and improving the thermal performance of a building.


The aim of the BASIX legislation in the Coffs Harbour area is to reduce the consumption of mains-supplied potable water by 40%, requiring all new houses to have a Rainwater Tank. The BASIX legislation also applies to substantial renovations/extensions and swimming pool installation.


This can be achieved by installing our 20,000-litre Inground Concrete Water Tank. The Tank water is used for flushing the toilets, it's used over the laundry tub and the washing machine, and for all outdoor Water use.

The Benefits of Installing A 20,000-Litre Inground Coolamon Concrete Tank

Invisible Tank Installation – The Tank can be buried under your lawn, in a garden, or even under your garage floor. No unsightly plastic Tank will be sitting beside your home, taking up valuable space.

Guilt-free Water Usage – You can use your huge 20,000 litre Water supply guilt-free. You can set up a sprinkler (remember those) on your lawn, hose your driveway (without your neighbours giving you the evil eye), top up your pool, water the garden anytime, and it's all FREE!

Value Adding To Your Home – The selling benefits of having an invisible 20,000-litre underground concrete Water Tank add value to your home.

Cost Savings – You can save hundreds of dollars yearly on your Water Usage.

Car Washing – Washing your car with rainwater doesn't leave chlorine spots as it does from the chlorinated town Water, which is especially visible on dark-coloured cars.

Boost your points towards your BASIX certificate by installing our 20,000-litre tank.


The specifications of our standard medium-duty 20,000 litre Tank, at a glance:

  • Diameter – 3600mm
  • Depth – 2270mm
  • Walls, floor and lid – 125mm thick
  • Concrete – 32mpa & Vibrated
  • Steel – F82 (Double layer in the lid)
  • Piers – 1 central 125mm
  • Manhole – 450mm x 450mm

Our super heavy duty tank design can carry a W8 (8-tonne) wheel load if required.

Call us at 02 6653 7357 and discover your perfect solution!

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