Different Types of Water Tanks
Steel, concrete, fibreglass and plastic tanks each behave differently once they are holding water. Here is how the four materials compare, and what to check before you choose one.
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Articles | Knowledge Hub
Make Better Decisions About Water Storage
Practical, plain-language guidance on choosing, installing and maintaining water storage, written by the Promax team.
Combatting Drought and Price Volatility
Lead times, raw material prices and drought all push in the same direction: buy the tank before you need it. Promax's answer was the Promax Promise, which locks in the delivery and the original price.
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7 Risks With Buying a Cheap Rainwater Tank
Poly rainwater tank prices vary widely, and a cheap tank is cheap for a reason. The saving usually comes out of the design, the raw materials, the fittings or the warranty.
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Discover Why Promax Slimline Tanks Are the Preferred Choice
Kiwi sections are shrinking, and the Promax Slimline is built for that: a narrow tank that sits along a fence or behind the house, with seismic restraints already built in.
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ENDURO vs XPRESS
ENDURO tanks have corrugated sidewalls and can be inset up to 1 metre in the ground; XPRESS tanks are smooth-walled, come in two colours and carry a budget-friendly price. Both are built to AS/NZS 4766.
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Small Tanks Deliver A Lot Of Value
Even the smallest Promax tank can provide thousands of litres of water every year. Capacity is only a guide: a tank that keeps refilling punches well above its size.
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Buyers Checklist
Ten questions worth asking before you buy a water tank, and where to find the answer to each one. Get these right up front and the rest of the decision follows.
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Ten Reasons to Purchase a Promax ENDURO Water Tank
The Promax ENDURO is a one-piece corrugated tank carrying a 20 year warranty, available in seven colours, and rated to be buried up to 1 m without losing that warranty. Here is what the range gives you.
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Buying the right water tank
Size, budget, site, material, maintenance and consent: the pieces of the tank buying puzzle, and how to weigh each one before you order.
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Not all poly tanks are made equal
Two poly tanks can hold the same litres and look much alike from the driveway. Ten reasons a Promax rainwater tank is not the same tank as the cheaper one beside it.
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Calculate capacity
Work out the storage you need from your daily water use and the length of your dry period, then check what your roof can actually collect. This covers both sums and what to look for in the tank itself.
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What Size Water Tank Do I Need?
No one has ever complained that their water tank is too big. Here is how budget, footprint and council rules shape the answer, and why you should round up.
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Explore Our Range
Shop Popular Categories
Browse Promax tank categories for residential, rural, commercial, and specialised applications.
Water Tanks
Reliable Storage
Water Tanks
Durable above-ground water tanks for rural, residential, and commercial storage.
Underground Tanks
Space Saving
Underground Tanks
Underground water storage for sites where space, access, or visibility matters.
Slimline Tanks
Built for Tight Spaces
Slimline Tanks
Narrow-profile tanks designed for homes, boundaries, and other restricted spaces.
Industrial Tanks
Heavy Duty Solutions
Industrial Tanks
Specialised tanks for demanding commercial, industrial, and process applications.