Contain Water System Tanks are corrugated steel tanks with potable PVC liners. Contain Systems tanks range in size from 750 gallons to 188,000 gallons. Our most popular size has been our 55,000 gallon model 3003 at 30 feet in diameter and 19 feet tall. It is available for roughly $40,000. This price does not include permit fees, site preparation, geotechnical soils reports/engineering, or special inspections required by permitting authorities. Call for more information.