Underground concrete rainwater tanks offer many benefits. When most people think of rainwater tanks, they picture a large, above-ground structure taking up valuable space in the yard. But at Ri-Industries, we do things differently. Our underground concrete rainwater tanks, manufactured right here in South Australia, are designed to give you high performance, long-term durability—and a whole lot more than you might expect.
If you’ve been considering rainwater harvesting, here are five surprising reasons why going underground with a concrete tank is the smarter, more sustainable choice.
1. Cooler Water Year-Round
Unlike above-ground plastic tanks, our underground tanks stay well insulated below the surface. That means cooler water – even at the peak of summer. Cooler water is not only more pleasant to use but also discourages bacterial growth, making your stored water cleaner and safer for household or garden use.
2. No Algae, No After-Taste
Algae thrive in sunlight – and above-ground tanks often struggle with it. Underground concrete tanks are naturally shielded from light, virtually eliminating the risk of algae growth. Plus, with no plastic lining, your water won’t pick up that unpleasant “tank taste.” Just clean, fresh rainwater – exactly as nature intended.
3. Out of Sight, Not Out of Mind
Don’t want a tank dominating your outdoor space? We get it. Installing your tank underground keeps your landscape neat and uncluttered. Whether you want to preserve your garden design or maximise usable space, our tanks stay completely out of sight while doing the hard work below.
4. Vandal- and Fire-Proof
Concrete is tough – really tough. Unlike plastic tanks, concrete won’t melt, warp, or catch fire. And being underground also protects it from vandalism or weather damage. This level of durability makes concrete tanks ideal for both rural and suburban homes, especially in bushfire-prone areas.
5. Built to Last (and Built for You)
Every Ri-Industries tank is made from high-frequency vibrated reinforced concrete, cast with steel mesh and fitted with brass components for superior strength and longevity. And because we manufacture locally in Adelaide, we can custom-position inlets and outlets to meet your specific site needs.
Backed by full engineering approval and our manufacturer’s warranty, our tanks are designed to last the distance – giving you peace of mind for decades to come.
Ready to Future-Proof Your Water Supply?
Whether you’re building, renovating, or simply planning for a more sustainable future, an underground concrete rainwater tank is a smart, long-term investment.
Call us on (08) 8444 8100 or request a quote online to find out how a Ri-Industries tank can work for your property.
Let’s build something that lasts – starting beneath the surface.