The RP91A/H3 Manual Rotary Drum Pump is a heavy-duty rotary drum pump designed for the reliable transfer of engine oils, lubricating oils, and other petroleum-based fluids. Constructed with a lightweight aluminum body and a Ryton® (PPS) rotary vane, it features a proven self-priming mechanism and a three-piece suction tube for use with standard 5–55 gallon drums. Ideal for transferring engine oils, gear oils, hydraulic oils, automatic transmission fluids (ATF), diesel fuel, and other compatible petroleum-based liquids in automotive, industrial, agricultural, and workshop applications.