A method for renal replacement therapy includes priming a fluid circuit and recirculating the sterile fluid during priming to permit gas to float out of the sterile fluid into a fluid reservoir. Each host adaptor module is configured to interact with one of the plurality of host ticketing environments. The hook unit is mounted to the door functioning to open or close a cabinet. The camshaft position may be maintained by a cam phaser that is coupled to the camshaft and in communication with the cam phaser OCV.