How to Choose What Styel of Rainwater Tank Rain Water Tank Is Most Suited For Melbourne

There aren’t many consolations to a rainy day– cosy couch time, soothing sounds of drops on the roof, and perhaps a rainbow or a puddle-splash afterwards. But you can add another by building a water tank to capture a bit of that downpour: it’ll reduce your environmental footprint by lowering your demand on mains water and the amount of stormwater runoff into rivers and oceans, and can also slash your water bill in the longer term.

Rainwater tanks are no longer just huge, round and bad-looking; they can be found in all shapes and sizes that can make efficient use of modest or tricky urban spaces.

Water for outdoor or indoor application?

The most important issue to consider before you purchase and install a rainwater tank is how you want to use the water.

Utilizing the water outdoors– for watering the garden and washing the car, as an example– is the most convenient way to start, as you probably just need the supplier to install the water tank, instead of a licensed plumber. And it will promptly cut your consumption of mains water.

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

What size tank do I need to have?

The storage capacity you choose will rely on the size and shape of your household and garden. Round, squat tanks fit adequately 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 need 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 understand before getting a water tank?


Rainwater tanks normally are available in the following materials:

Metal tanks are made from corrugated or flat rolled metal, which may be galvanised or coated. They often come with a plastic inner lining (Aquaplate) that will enhance the life of the tank and safeguard the water quality.

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

Fibreglass tanks are rust and chemical-resistant and developed to withstand extreme heat levels. They’re not the cheapest alternative, and preferable for above-ground installation, while all other styles can also be set up below ground.

Concrete tanks, more frequently used for agricultural and industrial reasons, won’t rust, burn, melt or blow away. They can possibly be bought ready-made, or custom made onsite.


Ask your community 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, together with restrictions on the tank’s placement, colour, height and labelling or noise regulations for a pump.

Are you refurbishing, building new or retrofitting?

If you are restoring or building, in lieu of retrofitting, you may have to incorporate energy and water-efficient functions in your plans to observe new legislative requirements.

Extra expenditures

When acquiring quotes, inquire if there are any further costs for delivery and installation; extra products (such as pipes, fittings and taps); optional extras (such as a first-flush or backflow-prevention device); a pump (unless you can work with gravity for water pressure); and a stand (unless you want 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 would like to connect the tank to your mains supply of water, look into the cost of a licensed plumber, and costs for any supplementary work that needs to be done to your roof and/or guttering.

Can you get a water tank rebate?

Consult 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 tank and whether it’s connected to a toilet and/or washing machine.


Rainwater tanks can range 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: vickeyprouty

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