A drum pump consist of both centrifugal and positive displacement. The application which they are designed for require that they have a small diameter, typically under 1.5 inches long in length with some reaching 72 inches, this pump is quite ergonomic to use and handle any clean liquid. A speed control knob, control the output flow and pressure. An optional electronic flow meter keeps track of fluid output and even shut down the motor at a preset amount. The motor attaches to the tube so one motor can easily be used on several different units. This prevents fluid contamination in the drum pump.