Peritoneal dialysis patient line with sterilizing filter and drain bypass

A peritoneal dialysis system comprising:

• a cycler configured to pump peritoneal dialysis fluid;
• and
• a disposable set configured to receive the peritoneal dialysis fluid pumped by the cycler, the disposable set including a filter in which the peritoneal dialysis fluid is intended to flow in first and second directions, wherein the filter is configured to filter the peritoneal dialysis fluid flowing in the first direction and to not filter the peritoneal dialysis fluid flowing in the second direction, the filter including:
• a filter housing,
• a first fluid pathway provided by the filter housing for flowing the peritoneal dialysis fluid in the first direction,
• a one-way valve located at or near an exit end of the first fluid pathway,
• a second fluid pathway provided by the filter housing for flowing the peritoneal dialysis fluid in the second direction, and
• a membrane positioned along the first fluid pathway upstream from the one-way valve to filter the peritoneal dialysis fluid flowing in the first direction,
• wherein the exit end of the first fluid pathway is located downstream from the peritoneal dialysis fluid flow through the membrane.