Medical fluid therapy system and method employing distillation

A peritoneal dialysis system comprising:

• a peritoneal dialysis fluid cycler;
• a disposable unit operable with the peritoneal dialysis fluid cycler to pump peritoneal dialysis fluid to and from a patient;
• a peritoneal dialysis fluid mixing container in fluid communication with the disposable unit, the peritoneal dialysis fluid mixing container configured to accept purified water and at least one peritoneal dialysis fluid concentrate to form fresh peritoneal dialysis fluid;
• and
• a distillation unit including:
• an unpurified water/used peritoneal dialysis fluid storage tank for accepting unpurified water, the unpurified water/used peritoneal dialysis fluid storage tank in fluid communication with the disposable unit for accepting used peritoneal dialysis fluid,
• a heater in fluid communication with the unpurified water/used peritoneal dialysis fluid storage tank, the heater configured to boil the unpurified water and the used peritoneal dialysis fluid to form water vapor,
• a condenser including a thermally conductive flowpath configured to accept and condense the water vapor, and
• at least one finishing filter positioned to receive and further purify the condensed water vapor into purified water for use in the peritoneal dialysis fluid mixing container to form the fresh peritoneal dialysis fluid.