5,000 Litre Enduramaxx Rainwater Harvesting Tank – non potable. Enduramaxx 5,000 Litre Rainwater Harvesting Tank, Vertical, non-potable. Dimensions 1900mm dia x 2300mm H. These Enduramaxx rain harvesting tanks are ideal for collecting surplus rainwater from your roof. Having a rain collection tank for water catchment and storage makes use of a free resource that can …