Extras like a pressure pump, ability to top up with drinking water, a backflow and first flush device.
The suitability of your roofing materials.
Whats involved in installation
Kind of maintenance necessary.
Apart from purchasing a tank, there are a number of other possible expenses you need to be aware of including:
Gutter, roof and downpipe alterations
A foundation or tank stand for above ground tanks
Excavation work for below ground tanks
Backflow prevention devices
A flow regulator
First flush device, screens and gutter guards
A pump if needed
A pipe to top up if needed.
Value for money and the environment
After weighing up the cost of a rainwater tank and its associated expenses, you should also consider the long term benefits of purchasing a rainwater tank. This includes the savings in your water consumption costs. Just as importantly, you should also consider that by saving water you are also contributing to preserving our environment.