The 3525 belowground holding tank from Norwesco provides a large-capacity solution for fire suppression, rainwater harvesting, potable water and sewage holding. It has molded-in tie down and lifting lugs on the corners for ease of handling. Its multiple fitting flats provide maximum flexibility for plumbing during installation. The tank is designed with molded-in support columns for structural support and strength when backfilled. 800/328-3420; www.norwesco.com.