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We specialise in rainwater tanks installations...

Rainwater Tank Types & Materials


This page will help you if you'd like to know a little more about:

Styles of tank available The advantages & disadvantages of different shapes
Features of different water tank materials What are the tanks made of?

If you already have a good idea of what kind of water tank you need, see the list of our shapes and sizes of poly and steel tanks

If you need any help along the way, just ask us for advice.


What shape of rainwater tank would be best?

  Advantages   Disadvantages

Round
  • Most cost effective
  • Can fit into unused corners
  • Full range of diameters from 90cm to 15m
  • Difficult shape to fit into many small gardens

Slimline
  • Best fit for most urban homes
  • Different widths available for narrow spaces
  • Can be very slim - down to 260mm!
  • Can go flat against a fence or wall
  • Custom-made steel slimline tanks up to 7000L capacity with the width and length you want
  • Mid-range price
  • Poly slimlines only up to 3000L in WA – for more capacity join 2 together
  • Very slim tanks are a premium product

Bladder
  • Good for low spaces such as under decks
  • Larger sizes competitive with slimline tanks
  • Whole tank base must be level
  • Can’t go over 600mm high, so greater volume means very long, or wide
  • 3000L bladder would be 5500 x 1100mm
  • Timber decls often don't have wide enough spans

Underground
  • Gets the tank out of sight
  • Good water quality from being cool & dark
  • Can be very slim - down to 260mm!
  • Low profile tanks easy to install in sandy soils
  • Water filtration is straightforward
  • Does cost more for both tank and installation
  • Ideally installed when building new home

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What are the tanks made of?

Material    Key Features    Material    Colours Warranty

Plastic "Poly"
  • Range of shapes
  • Biggest range of sizes
  • Lightweight
  • Easy to install
  • Can sit on sand or paving
  • Underground options
  • Food-grade polyethylene approved to AS 4020 for drinking water.
  • One piece design with no seams
  • UV resistant
  • Up to 27 colours available for same cost depending on manufacturer

10 years

Steel "Aquaplate"
  • Custom made to required size
  • Traditional look
  • Lightweight
  • Must sit on concrete pad
  • Corrugated steel with a plastic coating laminated to the inside to prevent corrosion
  • Also made to AS 4020
  • Plain zincalume
  • Pale green or cream Colorbond
  • Any spray painted colour

20 years

Plastic bladder
  • Good for long, wide & low spaces out of direct sunlight– e.g. under a deck
  • TPU or PVC sheet, welded
  • Also made to AS 4020

10 years

Large steel
  • Curved steel sections bolt together into a ring
  • Plastic liner inside retains the water
  • Easy to get onto site
  • Quick to construct
  • Thick PVC sheet, welded
  • Also made to AS 4020
  • Zincalume
  • 5 Colorbond

20 years Liner 10 yrs

Concrete
  • Precast, or poured in-situ
  • Fireproof
  • Often cracks or leaks slightly over time
  • Best for large underground tanks
  • Concrete or ferro-cement

10 years

All tanks are made to the same Australian Standard AS4020 for products in contact with drinking water. Plastic tanks also meet AS2070 for food contact.

Rainwater tends to be slightly acidic, and you may notice this whatever material your tank is made from. New rainwater tanks can impart specific tastes and odours that may be noticeable but are not harmful. For example, PVC liners can impart a plastic taste when first used, due to the plasticiser.

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