Looking for reliable water tanks in NZ? Rain Reserve combines five decades of rotational moulding expertise with modern water storage solutions designed specifically for New Zealand conditions. From compact 625L garden tanks to robust 30,000L large tanks, we manufacture quality plastic water tanks that stand the test of time.
Every tank comes with our 10-year no-nonsense warranty and free nationwide delivery. Whether you need a slimline water tank for your urban garden or a 1000 litre water tank for residential use, we've engineered solutions that work hard for Kiwi homes and properties.
Why Harvest Rainwater?
Adopt a sustainable approach that benefits the environment
Reliable Water Supply during Dry Season
Enjoy significant savings while ensuring water security year-round
Save on Water Bills
Rain Reserve's residential rainwater tanks provide a secure water supply you can count on
Peace of Mind for Years to Come
Why Choose Rain Reserve:
At Rain Reserve, we don't just offer water solutions – we provide peace of mind. Our tanks are built to last and designed to exceed your expectations.
We stand behind the quality of our products. That's why ALL our tanks come with a 10-year no-nonsense warranty. If there's a problem, we'll sort it
– no questions asked.
10-Year No-Nonsense Warranty
Your tank doesn't have to be an eyesore. Choose from our range of colours* to match your property's aesthetic. From subtle earth tones to bold statement colours, we've got you covered.
Colour Options Available
All Rain Reserve tanks are 100% BPA-free. We prioritise your health and the environment, ensuring our tanks are safe for storing drinking water.
BPA-Free for Your Safety
Our commitment to quality isn't just talk. All our tanks are manufactured to industry best practices and meet stringent standards: AS/NZS 4020 and AS/NZS 2070.
Meeting and Exceeding Standards
Turning Raindrops into Reserves
About Us
We understand the growing concerns around water conservation and costs in New Zealand. At RainReserve by PRM, we are committed to empowering Kiwis with sustainable, cost-effective rainwater storage solutions through the creation of residential rainwater tanks.
With over 50 years of experience in water management, we've developed systems that efficiently capture and store rainwater, seamlessly integrating with your existing water infrastructure.
Pro Tip: Not sure what size you need? A good rule of thumb is to calculate your roof catchment area (in m²) and multiply by your average annual rainfall (in mm) to estimate potential collection capacity.
Frequently Asked Questions
Water collected from rainwater tanks can be safe to use if proper precautions are taken. It is important to ensure that your roof and gutters are clean and free from contaminants like bird droppings or debris. Using a diverter can help reduce contamination by diverting the initial flow of rainwater, which may contain pollutants, away from the tank. Regular maintenance and testing of water quality can further ensure safety.
Yes, without proper maintenance, rainwater tanks can become contaminated by debris, animal droppings, or other pollutants. To prevent this, it is crucial to regularly clean your gutters, use gutter mesh to block leaves and debris, and inspect your tank annually. Installing a fine mesh and a diverter can also help maintain water quality by preventing contaminants from entering the tank.
Rainwater tanks are designed to minimise issues such as mould growth. Tanks made from durable materials like thermoplastic are resistant to algae and mould growth.
However, keeping the tank sealed properly and maintaining it regularly will help prevent any potential mould issues. Ensuring that the tank is installed correctly and that all entry points for water are clean will further reduce the risk of mould development.
The best rainwater tank for you depends on your specific needs, available space, and intended use. At RainReserve, we offer a range of high-quality tanks designed to suit various requirements: Slimline Tanks, Garden Tanks and Big Commercial Tanks
To determine the best tank for your needs, consider factors such as:
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Available space on your property
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Your water usage requirements
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Local rainfall patterns
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Aesthetic preferences
Our team is happy to provide guidance on selecting the right tank for your specific situation. While we don't offer installation services, we can provide advice on setup and maintenance to ensure you get the most out of your RainReserve tank.
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