Dialysis machines and methods of disinfecting a dialysis machine

This invention describes a dialysis machine with specialized fluid pathways for disinfection. It includes a circuit to recirculate spent dialysis fluid for cleaning, and another circuit to recirculate fresh dialysis fluid. A controller manages these circuits to disinfect the machine using heated fluid or chemicals. The design also features a bypass that can divert fresh fluid from its recirculation path directly to a drain, allowing for specific flushing or disposal procedures without passing through the main treatment path.