The PTC-P is build for technicians on the move. Used clean 5/16" - 1" I.D. tube in chillers, evaporators, heat exchangers. The flexible shaft rotates at 1450 rpm as water feeds through the nylon casing to the cleaning tool. As the tool removes the deposits, the water flow flushes them out. A solenoid valve ensures that water flow only when the machine is running.