A tubing assembly for use with a fluid delivery system, the tubing assembly comprising: a first fluid line having a distal end and a proximal end with a first connector and a first filling port at the proximal end for connecting to a first fluid source; a second fluid line having a distal end and a proximal end with a second connector and a second filling port at the proximal end for connecting to a second fluid source; a third fluid line having a distal end and a proximal end; a connector assembly for connecting the distal end of the first fluid line and the distal end of the second fluid line to the proximal end of the third fluid line; and characterized in that the tubing assembly further comprises a tubing holder for receiving the connector assembly and at least a portion of the third fluid line, the tubing holder having a first portion and a second portion movable relative to the first portion between a first, open position and a second, closed position, wherein, in the first, open position, the first fluid line, the second fluid line, and the third fluid line are unobstructed to allow fluid flow through at least one of the first fluid line and the second fluid line to the third fluid line while the first filling port and the second filling port are closed to prevent fluid flow through the first filling port and the second filling port, wherein, in the second, closed position, at least a portion of the first fluid line, the second fluid line, and the third fluid line are pinched or folded by the first portion and the second portion to selectively block the fluid flow through the first fluid line, the second fluid line, and the third fluid line. a first fluid line having a distal end and a proximal end with a first connector and a first filling port at the proximal end for connecting to a first fluid source; a second fluid line having a distal end and a proximal end with a second connector and a second filling port at the proximal end for connecting to a second fluid source; a third fluid line having a distal end and a proximal end; a connector assembly for connecting the distal end of the first fluid line and the distal end of the second fluid line to the proximal end of the third fluid line; and characterized in that the tubing assembly further comprises a tubing holder for receiving the connector assembly and at least a portion of the third fluid line, the tubing holder having a first portion and a second portion movable relative to the first portion between a first, open position and a second, closed position, wherein, in the first, open position, the first fluid line, the second fluid line, and the third fluid line are unobstructed to allow fluid flow through at least one of the first fluid line and the second fluid line to the third fluid line while the first filling port and the second filling port are closed to prevent fluid flow through the first filling port and the second filling port, wherein, in the second, closed position, at least a portion of the first fluid line, the second fluid line, and the third fluid line are pinched or folded by the first portion and the second portion to selectively block the fluid flow through the first fluid line, the second fluid line, and the third fluid line.