Water Tank design and fabrication has been Darco's core business in one fashion or another since 1978. In 1998 Darco Incorporated began manufacturing our patented OcTank polyethylene water storage tank line and also distributing our proprietary fiberglass water storage tanks.

We manufacture individual underground tanks ranging in size from a 4,000 gallon polyethylene OcTank system to our largest standard individual fiberglass vessel at 75,000 gallons.

Multiple tanks can be installed to increase total water storage volume or to create a more desirable "footprint" if space is limited or terrain is difficult at the installation site.