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.

When acidic water sits inside a concrete tank, a chemical reaction occurs. Classic signs of degradation include rough, exposed aggregate on the inside walls where the smooth cement paste has dissolved. Installing a polyethelyne tank liner acts as a complete physical barrier. It stops the acidic water from ever touching the concrete again, effectively sealing existing leaks and halting the leaching process entirely.

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.