Abstract: A drift is inserted into a first end of a first pipe and a first actuator is pressed against a second end of the first pipe. A valve in the first actuator is opened and a valve in a second actuator is closed. When a vacuum is turned on, suction is applied to the first actuator, drawing the drift through the first pipe. The drift is removed from the second end and inserted into a second end of a second pipe. The second actuator is pressed against a first end of the second pipe. The valve in the first actuator is closed, the valve in the second actuator is opened, and suction is applied, drawing the drift through the second pipe. The back-and-forth process is repeated for each of a number of pipes. If the drift encounters an obstruction, the pipe can be set aside for further inspection.