The molded-in full drain outlet from Assmann Corporation of America is designed for 2,500-gallon and larger tanks. The outlet enables the tank to be drained without mechanically installed nozzles. It can be used where heavy solids or salts might accumulate in the bottom of a tank. The 3- or 4-inch outlet is available in variations of 315 stainless steel, titanium and hastelloy. 888/357-3181; www.assmann-usa.com.