GoatThroat Pumps for liquid transfer are built to last 8-10 years. Made from durable, high performance polypropylene, the series of pumps will safely deliver most solvents, acids, caustics and oils from 5 to 55 gallon drums at rates up to 4 gallons per minute depending on viscosity. Typically, o-rings will need to be replaced once or twice during the life of the pump; all parts are user accessible.