A cartridge for jetting a fluid, the cartridge comprising: a reservoir for holding and providing the fluid, a tower having an interior chamber for receiving the fluid from the reservoir and further providing the fluid, the tower comprising, a first end proximate the reservoir , a second end distal the reservoir , a port in the second end of the tower , an interior for conducing the fluid from the reservoir , a first rib and a second rib extending along a length of the tower between the first and second ends of the tower , and in the interior of the tower , a second end of the first rib and a second end of the second rib are substantially adjacent the second end of the tower , and the first rib extends along the length of the tower toward the first end of the tower , the cartridge being characterized in that a first end of the first rib extends further than a first end of the second rib, and a length of the first rib is longer than a length of the second rib, and a jetting head having a first via for receiving the fluid from the port, and the jetting head is configured for expressing the fluid from the cartridge, wherein the second end of at least one of the first rib and the second rib at least partially overlaps the first via within the port, and is spaced apart from the first via by a gap . a reservoir for holding and providing the fluid, a tower having an interior chamber for receiving the fluid from the reservoir and further providing the fluid, the tower comprising, a first end proximate the reservoir , a second end distal the reservoir , a port in the second end of the tower , an interior for conducing the fluid from the reservoir , a first rib and a second rib extending along a length of the tower between the first and second ends of the tower , and in the interior of the tower , a second end of the first rib and a second end of the second rib are substantially adjacent the second end of the tower , and the first rib extends along the length of the tower toward the first end of the tower , the cartridge being characterized in that a first end of the first rib extends further than a first end of the second rib, and a length of the first rib is longer than a length of the second rib, and a first end proximate the reservoir , a second end distal the reservoir , a port in the second end of the tower , an interior for conducing the fluid from the reservoir , a first rib and a second rib extending along a length of the tower between the first and second ends of the tower , and in the interior of the tower , a second end of the first rib and a second end of the second rib are substantially adjacent the second end of the tower , and the first rib extends along the length of the tower toward the first end of the tower , the cartridge being characterized in that a first end of the first rib extends further than a first end of the second rib, and a length of the first rib is longer than a length of the second rib, and a jetting head having a first via for receiving the fluid from the port, and the jetting head is configured for expressing the fluid from the cartridge, wherein the second end of at least one of the first rib and the second rib at least partially overlaps the first via within the port, and is spaced apart from the first via by a gap . <EOS>