TREDRUME - Telescopic Electric Drum Pump - Light Duty. Delivery volume of 4. 2 Gallon per Minute ( 16 Liters per Minute ) / Buttress Adapter and Drum Bung Adapter Included. Electric Drum Pump for 15, 30 and 55 Gallon Drums with Telescopic Suction Pipe ( 1. 9 feet to 2. 8 feet ) and Full Control Nozzle.