Method for detecting connectivity in interconnected channels in an endoscope undergoing reprocessing using an automatic reprocessor, the method including providing a source of pressurized fluid, directing the pressurized fluid to a first channel in an endoscope, monitoring back pressure in a second channel interconnected to the first channel and determining whether the interconnected channels are connected between the endoscope and the reprocessor by comparing the actual back pressure to a predetermined back pressure corresponding to the specific interconnected channels and model of endoscope undergoing reprocessing.
