DuroMaxx rainwater harvesting cisterns are constructed of DuroMaxx steel-reinforced polyethylene (SRPE) for a strong and durable storage solution. These cisterns are available in sizes up to 120 in. in diameter and 48-ft lengths. They are leak-tested and labeled with the UPC seal to ensure a reliable long-term storage solution. Contech hydrodynamic separator and filtration products provide pretreatment for storm water prior to storage to provide the best water quality and reduced maintenance costs for demanding rainwater harvesting applications.