Siphon pumps allow the user to transfer fluids from one container to another in an efficient and convenient manner. Siphon pumps use vacuum suction to draw fluid from one container to another. Once the vacuum is broken the transfer stops. Tolco offers a variety of siphon pumps for use with 5-gallon pails up to 55-gallon drums. The pump outputs range from 1 GPM to 7 GPM.