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Over time, sediment, sludge, and organic matter build up in the bottom of your water tank. It can make your water look, taste, and even smell bad. Even clear-looking rainwater regularly contains unhealthy bacterial contaminants such as E.coli, Giardia, and Cryptosporidium. As rainwater experts serving Waiheke Island we have compiled a list of our most popular FAQs on our water tank cleaning service.

For Waiheke Island homes, rural properties and high-capacity rainwater storage needs ( 25-100,000 litres+) , a timber tank is a smart, sustainable and practical choice.

On Waiheke Island, your rainwater system isn’t just a utility — it’s your lifeline. With local homes relying entirely on roof-collected rainwater, maintaining the full harvesting-to-tap system is critical, particularly during the dry summer months. We are Waiheke Island’s rainwater system experts, and we make rainwater safe to drink for you and your family. Check out the Tankman Guide to water systems on Waiheke.

As beautiful as they are, pōhutukawa flowers are one of the biggest culprits behind tea-coloured water, bitter tastes, unpleasant odours, and staining on spas, sinks, and toilets.

TANKMANS Ozone system flush will treat, condition and filter the entire contents of your water tank, without using chemicals or draining your tank. The Ozone filtration process will take 48 hours, but unlike chemical sterilisers, you can continue to safely use your house water as normal through the process.