Working with D.P. Wolff, Inc., Tanks Direct delivered and furnished two 40,000-gallon ZCL|Xerxes water storage tanks to the research center within the facility expansion in New York. The underground storage tanks will serve as part of a Brae rainwater harvesting system for the large building. The water will be collected from the roof drainage, cleaned, and treated with a germicidal ultraviolet water purification system then reused for ground irrigation.