A dialysis system comprising: a peritoneal dialysis cycler including: a cassette interface ; a patient line ; a drain line ; a plurality of fluid storage bag lines ; a fill bag line ; and a cassette coupled to the cassette interface , the patient line , the drain line , the fluid storage bag lines and the fill bag line , the cassette including: a cassette housing; a plurality of channels fluidly coupled to a plurality of connectors (208a-g) each of which is coupled to a respective one of the patient line , the drain line , the fluid storage bag lines and the fill bag line ; a plurality of valves (250a-m) disposed within the plurality of channels ; and a single pump assembly disposed within the cassette housing, the pump assembly having: a pump housing , wherein the pump housing includes an inlet and an outlet coupled to the plurality of channels ; and characterized in that the pump assembly comprises a flexible rotor including a plurality of flexible vanes , wherein the flexible rotor is rotatable in either a clockwise direction or a counterclockwise direction to move a fluid through the plurality of channels . a peritoneal dialysis cycler including: a cassette interface ; a patient line ; a drain line ; a plurality of fluid storage bag lines ; a fill bag line ; and a cassette coupled to the cassette interface , the patient line , a cassette interface ; a patient line ; a drain line ; a plurality of fluid storage bag lines ; a fill bag line ; and a cassette coupled to the cassette interface , the patient line , the drain line , the fluid storage bag lines and the fill bag line , the cassette including: a cassette housing; a plurality of channels fluidly coupled to a plurality of connectors (208a-g) each of which is coupled to a respective one of the patient line , the drain line , the fluid storage bag lines and the fill bag line ; a plurality of valves (250a-m) disposed within the plurality of channels ; and a single pump assembly disposed within the cassette housing, the pump assembly having: a pump housing , wherein the pump housing includes an inlet and an outlet coupled to the plurality of channels ; and characterized in that the pump assembly comprises a flexible rotor including a plurality of flexible vanes , wherein the flexible rotor is rotatable in either a clockwise direction or a counterclockwise direction to move a fluid through the plurality of channels . a cassette housing; a plurality of channels fluidly coupled to a plurality of connectors (208a-g) each of which is coupled to a respective one of the patient line , the drain line , the fluid storage bag lines and the fill bag line ; a plurality of valves (250a-m) disposed within the plurality of channels ; and a single pump assembly disposed within the cassette housing, the pump assembly having: a pump housing , wherein the pump housing includes an inlet and an outlet coupled to the plurality of channels ; and characterized in that the pump assembly comprises a flexible rotor including a plurality of flexible vanes , wherein the flexible rotor is rotatable in either a clockwise direction or a counterclockwise direction to move a fluid through the plurality of channels . a pump housing , wherein the pump housing includes an inlet and an outlet coupled to the plurality of channels ; and characterized in that the pump assembly comprises a flexible rotor including a plurality of flexible vanes , wherein the flexible rotor is rotatable in either a clockwise direction or a counterclockwise direction to move a fluid through the plurality of channels . <EOS>