JEGS Siphon Drum Pump is designed to transfer select liquids out of or into your 55 gallon drum with a 2" bung opening. Siphons to a lower level or pumps to a higher level. Siphoning is controlled by the top mounted air vent. Compatible with fuel, light oils and water based fluids which are considered non-corrosive to polyethylene or PVC (do not use with lacquer thinner).