5 Gallon Drum Pump. Two fingers on the handle is all the energy required to pump viscous fluids, harsh acids or alkali cleaning chemicals. The unique patented pumping principle means no parts that wear. Constructed from Polypropylene and Polyethylene, this pump is resistant. to a wide range of acid, alkaline, caustic, and chlorine based chemicals, oils, crop chemicals, diesel and liquid fertilizers. Not to be used. with strong solvents, highly flammable liquids or for pumping petrol (gasoline). High volume delivery at low pressure makes pumping chemicals. safer. Double action means you get delivery on both the up, and down stroke. No wearing parts. Shown with optional strage bottle.