Rainwater tanks store rainwater for a range of uses such as watering gardens, washing cars, flush toilets, wash clothes and topping up pools. Rainwater tanks may be constructed from materials such as plastic (polyethylene), concrete, galvanized steel, as well as fiberglass and stainless steel which are rust and chemical-resistant.
Rain water tanks are made from sheets of corrugated iron. 1 sheet, 2 sheets or 3 sheets high with vertical and horizontal seams riveted together by stainless steel self piercing rivets.