the systems for connection of the device to the WD shall be designed so that the fittings provided by the WD manufacturer and intended for irrigation of the endoscope channel(s) cannot be connected to the endoscope leak test connector;
the connection system between the endoscope and the WD shall be designed so that the leak test connector on the WD cannot be connected to the endoscope channel(s);
the means used to monitor the pressure inside the device (e. g. pressure transducer) shall be independent from the means used to control the initial pressure (e. g. pressure regulating valve);
the system used to pressurize the device during each leak test shall be provided with means to prevent over-pressurisation of the device in the event of failure of the pressure control system;
the extent and duration of pressurisation and the pressure drop or air flow which will be used to indicate a fail shall be either, in accordance with the device manufacturers instructions for the devices which the WD is intended to process, or, independently verified by the WD manufacturer.