Dialysis system having filter testing

A peritoneal dialysis (“PD”) system comprising:

• a housing;
• a PD fluid pump housed by the housing;
• a filter set including a hydrophilic filter membrane;
• a dual lumen patient line in fluid communication with the PD fluid pump, the dual lumen patient line including a fresh PD fluid lumen in fluid communication with an upstream side of the hydrophilic filter membrane and a used PD fluid lumen in fluid communication with a downstream side of the hydrophilic filter membrane;
• a first pressure sensor positioned and arranged to provide a first pressure sensor output indicative of a PD fluid pressure in the fresh PD fluid lumen;
• a second pressure sensor positioned and arranged to provide a second pressure sensor output indicative of a PD fluid pressure in the used PD fluid lumen;
• and
• a control unit configured to evaluate the hydrophilic filter membrane by analyzing a pressure drop across the hydrophilic filter membrane, wherein the pressure drop includes a difference between the second pressure sensor output and the first pressure sensor output.