For the upfront cost of a good-quality steel tank, you can enjoy the bounty of nature for free year-round for decades to come. In fact, these gorgeous slimline water tanks come with a 30-year guarantee, and their rectangular space-saving shape is perfect for city dwellers.
You can also use different irrigation water tank.
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How much you can reduce your mains water consumption largely depends on four factors:
- The amount of rainfall in your area
- The size of your roof
- The size of your water rank
- Whether your water tank is plumbed into your household supply.
Let's start by addressing the first two factors, because they'll help you gauge how much water you can potentially harvest. The rule of thumb is that for 1sqm of roof area x 1 mm of average annual rainfall, you'll be able to harvest 1 litre of water.
So, how big should your tank be? Well, this depends on how you're using your water; keep in mind, about half of the average household water consumption in Australia is used for your house and garden.
If you're not planning to use your water tank for inside uses like washing machine, toilet, etc. then take your monthly water consumption and divide it by half. Get a water tank that's large enough for that usage, plus ideally an extra 20-30% or so capacity so you're better positioned to get through the dry season.
If you're using your water tank for indoors purposes, get a tank that will be large enough to fill those needs, with that extra 20-30%.
Better for the planet.
Having abundant water right at home and saving money is an exciting proposition, but there's more to it than that. Every drop that you're not consuming from mains helps to secure Australia's water future.
What's more, by harvesting that rainfall and using it at home, you're helping to combat flooding; in fact, water tanks have proven effective for flood management overseas in places like Korea, and flood management research led by UNSW finds very promising results for large-scale water tank implementation in helping to combat flooding.