An apparatus (1) for extracorporeal blood treatment comprising: a blood circuit that includes an arterial line (7) intended to draw blood from the patient and a venous line (6) intended to return blood to the patient； and a treatment solution administration system configured to administer the treatment solution within the blood treatment apparatus (1) through a treatment solution port (10), wherein the solution solution administration system treatment comprises: a plurality of tanks (11, 12) of treatment solution, wherein each tank (11, 12) of treatment solution of the plurality of tanks (11, 12) of treatment solution comprises an outlet； a set of pipes comprising a joint (63), a plurality of feed pipes (61, 62) connected to the joint (63), and an outlet pipe (64) connected to the joint (63), the assembly being of pipes configured to administer treatment solution from the plurality of reservoirs (11, 12) of treatment solution to the outlet pipe (64) through the joint (63)； a reservoir status monitor configured to determine when a treatment solution reservoir (11, 12) of the plurality of treatment solution reservoirs (11, 12) requires replacement； an outflow controller (31) operatively connected to the outlet line (64), wherein the outflow controller (31) is configured to administer treatment solution from the plurality of solution reservoirs (11, 12) from treatment to port (10) of treatment solution； a control unit (41) operatively connected to the output flow controller (31), wherein the control unit (41) is configured to operate the output flow controller (31)； characterized in that the treatment solution administration system further comprises: at least one gas-liquid separation filter (71, 72) positioned in the pipe assembly, where all the treatment solution that passes through the pipe outlet (64) passes through at least one filter (71, 72) of liquid-gas separation, including at least one filter (71, 72) of liquid-gas separation hydrophilic means through which
