Harlequin Potable Water Tanks are suitable to store water for human consumption and are manufactured from a specially approved grade of polymer. These drinking water tanks can be used in a range of environments and are commonly used as intermediate storage vessels between a well or borehole and the house, where it is not connected to mains water. These potable water tanks can also be used as break tanks where mains pressure is low. All potable water tank fittings have been tested and approved by WRAS. These water storage tanks can also be used for rainwater harvesting.