How To Install Your Water Tank
Water tanks as good as ours deserve the highest standards of installation.
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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.
How To Check Water Levels In A Poly Water Tank
Knowing how much water is in your tank tells you when to top up, how freely you can use it, and whether your pipework is leaking. Here is why it matters and the two ways to measure it.
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The Critical Role of Fire Service Kits
A fire service kit is the connection between your tank and a firefighting hose. This covers what a kit contains, how the standard, dual and buried-tank versions differ, and the FENZ access rules that apply once it is installed.
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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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Water Restrictions: Causes, Impacts and Solutions
Water restrictions are now normal across most of New Zealand. What is driving them, how they change life on farms and in cities, and what storing rain does about it.
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Are poly water tanks safe?
Polyethylene is inert and does not react with water, so a poly tank does not leach into what it stores. Here is what that means in practice, and why water from a poly tank tastes different to water from concrete.
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MBIE Determination Allows Poly Water Tanks on Boundaries Without Setback
MBIE determined that a stormwater tank near a property boundary is not required to comply with Building Code clauses C3.6 and C3.7. Here is what the determination says, and the council planning rules it does not override.
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Selecting the best base for your water tank
Sand, fine gravel and crusher dust compact well and cost least. Concrete suits smaller tanks. Whichever you choose, the base is part of the installation instructions, and following them is what keeps the warranty intact.
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Explore Our Range
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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.