10 % discount on the price of your tank. Offer valid from 1 May 2024 to 30 June 2024

📌 Please note that the 10% discount is applicable to the tank price only and does not apply to installation, transport, or fittings.


Mega Tanks by Rainbow Reservoirs

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South Africa is the 25th most populated country in the world. It’s ranked the 30th driest country in the world – it doesn’t even receive half of the world’s annual average rainfall.

But SA’s population continues to grow. And with it, so does the economy, resulting in a constantly increasing demand for already limited water resources within the country. In addition, uncertainty exists around reliable water provision that is diminishing due to infrastructure failure and load-shedding.

Projections show that within 6 years (2030) SA’s water demands will exceed supply by 17%!

And yet around 20,000 million m3 of water are discharged from South African rivers into the oceans each year! So, why not capture some of it, and store it in massive bulk storage water tanks… Mega Tanks.

And that’s why the largest users of water resources in South Africa (agriculture, urban, mining) have turned to Mega-tanks manufactured and installed by Rainbow Reservoirs to meet their increased water demand in the future.

Large volume aluzinc Mega tanks are built specifically with massive bulk storage capacities in mind – a single bolted steel tank unit is able to stockpile millions of litres of potable, raw or process water for future configuration.


✅ Capacities of several million litres


✅ Tapered wall design for hydrostatic/hydrodynamic force compensation

✅ Free-standing sealed roof design

✅ Rapid construction time compared with large-volume concrete water storage tanks

✅ Cost effective

✅ Reliable

✅ Minimal maintenance

Aesthetically pleasing – colour choices available

✅ 12-year warranty

✅ Estimated 40-year lifespan

Security ladders, inspection hatches, any accessories and components as per spec

Rainbow Reservoirs is a manufacturer and installer of premium Aluzinc sealed, bolted steel panel tanks for multi-application liquid or water storage solutions.

Our coveted liquid storage tanks are in extensive use worldwide as pivotal components in domestic, rural, agricultural, mining, forestry, commercial and industrial applications.

Some of our very satisfied (and highly discerning!) customers are to be found in Angola, Botswana, Ethiopia, Equatorial Guinea, Lesotho, Liberia, Madagascar, Mauritius, Mozambique, Namibia, Panama, Peru, Philippines, Seychelles, South Africa, Swaziland, Tanzania, Zambia, Zimbabwe…

Contact Rainbow Reservoirs Pty Ltd at: 011 965 6016, 082 550 7559

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Mega Tanks by Rainbow Reservoirs

South Africa is the 25th most populated country in the world. It’s ranked the 30th driest country in the world – it doesn’t even receive