Slimline Water Tanks

We manufacture our Slimline water tanks to a minimum width of 550 mm, making them an excellent choice for narrow or hard-to-access spaces.

For most sites, our standard or heavy-duty tank bracing system will keep your Slimline tank safely in place. Contact us to talk through your specific requirements and site attributes. 

Yes. Every one of our thin water tanks is made to order. Tell us what you need, and we’ll create the best solution for your requirements. Property developers and commercial property professionals trust our custom-made rainwater tanks to meet their exact requirements.

We manufacture our Slimline tanks, which range from 550 litres to 10,000 litres. Most other slim or thin water tanks on the market max out at 5,000 litres, meaning multiple tanks are required for water volumes exceeding 5,001 litres. A single tank results in lower installation costs compared to multiple tanks.

Whether you have a 1,000-litre water tank or a 10,000-litre one, we recommend using a concrete slab base for Slimline tanks. Learn more about your options or what you’ll need to do in our water tank base preparation guide.

When it comes to a water tank, thin options like our Slimline range require maximum strength in minimal space. AQUAPLATE® corrugated steel offers outstanding durability, is fully recyclable, fire-resistant, and BPA-free, meeting the AS/NZS 4020 drinking water standards and has a low environmental impact.

When choosing a water tank, your choice must match your space constraints and water requirements. Consider your available width, required capacity, and intended use. Our team can help you calculate the right size based on your property and usage patterns.

Retention tanks store rainwater for reuse (irrigation, toilets, etc.) to reduce demand on the municipal water supply. In contrast, detention tanks are stormwater tanks designed to temporarily hold the water to prevent flooding before slowly releasing it into the drainage system at a controlled rate.

Thin water storage tanks, such as our Slimline range, can serve either purpose with appropriate fittings based on council requirements.

Our expert team can turn around your Slimline tank in 7 to 10 working days (excluding delivery). When you contact us, we will discuss your commercial or residential water tank requirements and provide an accurate lead time.

We can deliver our Slimline tanks nationwide, with free delivery to metropolitan Auckland. We’ll prepare a cost estimate if you’re outside the Auckland region.

A seismic restraint secures your Slimline tank during earthquakes, preventing tipping, slipping, or overturning. It minimises the damage risk to your tank and helps avoid water contamination or loss. Thin tanks with higher height-to-width ratios may need additional bracing to meet building codes.