Designed for rapid heating and melting of thick liquids to facilitate handling in open containers. Standard heaters are 18" in diameter with a 36" riser to fit 55 gallon drums. Construction : Drum heaters are constructed with coiled nickel-chrome alloy heating elements. The single tube riser and triple loop heating coil is reinforced to give added stability. The heaters are sheathed in steel or stainless steel depending on liquids to be heated. They are equipped with automatic thermostat control. Applications : Waage drum heaters are immersed in the top of an open drum to melt or liquify grease, paraffin, wax or any other thick or congealed liquid. When used to melt solids the heater is placed on top of the substance; as melting occurs, the heater settles to the bottom of the drum by gravity.