The RP91 Manual Rotary Drum Pump is a heavy-duty rotary pump designed for the reliable transfer of engine oils, lubricating oils, and other petroleum-based fluids. Constructed from durable cast iron, it features a proven self-priming rotary vane mechanism that delivers dependable performance and long service life under demanding industrial conditions. Designed for use with standard 5–55 gallon drums, it is ideal for transferring engine oils, gear oils, hydraulic oils, automatic transmission fluids (ATF), diesel fuel, and other compatible petroleum-based liquids.