Main Description: Our standard Stainless-Steel units feature a reverse stem stainless steel ball valve mounted on the 48” side of the unit.  New units are also available with a center mount discharge.  All tanks are manufactured10-gauge or 10/12 -gauge stainless steel construction and single-seam robotic welding for greater strength and durability.  All units rated UN31A (Previously DOT57) for the transportation and storage of hazardous and non-hazardous liquids.  The 22 – 5/16” top opening is equipped with either a Rieke or Girard fusible vent, zinc plated clamp ring with nut and bole as well as EPDM gasket.