Looking for a light-duty Rotary Hand Pump that fits a standard 55-gallon barrel. The RP-5 is GPI’s economical model for light-duty in a rotary hand pump. Rotary Hand Pump for diesel fuel, kerosene and lightweight or medium weight oils. This pump fits a 2 inch NPT bung. Comes complete, includes adjustable spout, easy spin handle and three-piece suction pipe. Installs in minutes.