"Low center of gravity. Molded-in recesses for pump, handles, hose storage and straps. U.S.A. FDA Approved Drinking Water Yes, Drain Size in. 2, Tank Description Vertical, Tank Material Polyethylene, Fill Opening in. 10, UV Inhibitors Yes, Application Sprayer tank, Tank Size gal. 550. Largest 100 all polyethylene DOT approved tank on the market Four 10-24 inserts for easy installation Molded-in gallon markings"