Durable. Watertight. Economical. Versatile. VSL’s DuraStor™ Tanks are prestressed concrete storage tanks reinforced with post-tensioning tendons (governed by ACI 350 and AWWA D115). This method actively reinforces the structure and significantly enhances its watertightness and long-term durability. DuraStor™ Tanks can be constructed in many shapes to suit project needs – there are no practical limitations. Tanks have been constructed with capacities up to 30,000,000 gallons. Read more about DuraStor™ Tanks