How to Choose What Type of Water Tank Is Best Suited For Melbourne, Vic

There aren’t many consolations to a rainy day– cosy couch time, soothing sounds of water on the roof, and maybe a rainbow or a puddle-splash afterwards. But you can add yet another by attaching a water tank to capture some of that downpour: it’ll diminish your environmental footprint by reducing your demand on mains water and the amount of stormwater runoff into rivers and oceans, and can also cut your water bill in the long-term.

Rainwater tanks are no more just huge, round and uninviting; they are available in all shapes and sizes that can make efficient use of small or tricky urban spaces.

Water for outdoor or indoor application?

The absolute most important issue to consider before you get and install a rainwater tank is how you intend to use the water.

Applying the water outdoors– for watering the garden and washing the car, for instance– is the easiest way to start, as you most likely just need the supplier to set up the tank, rather than a licensed plumber. And it will immediately cut your usage of mains water.

Save much more by sending the rain water to your toilet, washing machine or water system, but you’ll require a licensed plumber to connect the tank to your mains supply.

What size rain water tank do I need to have?

The capacity you choose will depend on the shapes and size of your household and garden. Round, squat tanks fit very well under a deck, while slimline tanks are good for narrow spaces. An underfloor tank or bladder storage system is a good out-of-sight space saver, however is more expensive.

Your roof area and the annual rainfall in your region will also have to be considered. To help determine the size and shape that’s best for you, sellers often provide calculators on their websites, or your water authority may be able to help.

What else do I need to identify before acquiring a rainwater tank?


Water tanks usually come in the following materials:

Metal tanks are crafted from corrugated or flat rolled metal, which might be galvanised or coated. They often include a plastic inner lining (Aquaplate) that will increase the life of the tank and safeguard the water quality.

Polyethylene (plastic) tanks are prominent as they are comparatively cheap and durable. Because rust isn’t a conern, they are a good option for people living near the ocean. Other synthetic materials, such as PVC and geotextile, are applied for bladder storage. Bladders are useful for water storage below a deck or floor; while their material is strong, it’s not intended for outdoor installation.

Fibreglass tanks are rust and chemical-resistant and designed to withstand extreme temperature levels. They’re not the cheapest option, and better for above-ground installation, while all other styles can also be installed below ground.

Concrete tanks, more often used for agricultural and industrial reasons, won’t rust, burn, melt or blow away. They could be bought ready-made, or customized onsite.


Ask your local council and water supplier which rules and regulations are applicable in your region. You may need to forward a development or building application, and there may be guidelines around drinking rainwater or mosquito breeding prevention, along with restrictions on the tank’s specific location, colour, height and labelling or noise regulations for a pump.

Are you renovating, building new or retrofitting?

If you are remodeling or building, rather than retrofitting, you may have to incorporate energy and water-efficient characteristics in your plans to satisfy new legislative requirements.

Extra expenditures

When getting quotes, inquire if there are any additional costs for delivery and installation; extra components (such as pipes, fittings and taps); alternative extras (such as a first-flush or backflow-prevention device); a pump (unless you can use gravity for water pressure); and a stand (unless you wish to put it on the ground or below it, through which case you’ll need to think about the cost of special ground prep or excavation).

If you want to connect the tank to your mains water system, consider the cost of a licensed plumber, and expenses for any additional work that needs to get done to your roof and/or guttering.

Can you obtain a water tank rebate?

Contact your local water or government authority to see if you’re entitled to a cash grant or bill reduction– the answer may rely on the size of the water tank and whether it’s connected to a toilet and/or washing machine.


Rainwater tanks can fluctuate from around $700 to $2000, beginning with a small, freestanding model without pump or extras, to large, custom-built models. Costs vary depending upon the size, material, finish and strength of the tank.

Author: angelicabueno8

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