At Sydney Water Tanks, we are committed to providing water solutions that offer you freedom to use water without draining Sydney’s precious resource which include inconspicuous underground and in-ground water tanks. Sydney Water Tanks is a leading manufacturer and supplier of underground concrete rainwater tanks and concrete pits. Sydney Water Tanks is proudly Australian-owned and part of The Martins Group, a family run business with the Directors of the company having over 25 years experience in providing quality wastewater treatment and water storage systems to Australian households.