An assembly of devices consisting of functional units [e.g., a mains electricity (AC-powered) pump, solution mixer, monitor] intended to perform peritoneal dialysis, a treatment that removes fluid and metabolic wastes from the blood by infusing dialysate into the peritoneal cavity through a catheter and a disposable tubing system, and then removing the dialysate. Diffusion of metabolic wastes from the blood to the dialysate occurs within the abdominal cavity through the pores and intercellular channels of the peritoneum. The device may automatically control the flow of dialysate into and out of the abdominal cavity.