Harvesting rainwater and storing it in a polyethylene tank provides savings by reducing demand on reticulated water supplies. At a broader community level, the harvesting of rainwater has the potential to delay the need for new water supply infrastructure, minimise the reliance on water storage dams and reduce the need for spending on stormwater infrastructure.
Polyethylene tanks are manufactured to withstand harsh and varied climatic conditions such as are found on the South Island. Poly tanks are UV stabilised and carefully manufactured through a rotational moulding process that ensures long term structural strength. One of the key features of a poly tank is that it is not susceptible to rust or corrosion and is impact resistant. The polyethylene used is always food grade which means that correctly harvested and stored tank water will be taint free. Unlike some galvanised steel tanks that can leave a metallic taste, poly tanks can be a significant source of high quality drinking water. Polyethylene tanks are certified to meet the requirements of the AS/NZS 4766 standard.