Devices and methods for assembling a luer lock fitting (e.g., fitting for use in a hemodialysis and/or a peritoneal dialysis machine) may include a luer lock tool comprising a tool base including a grip portion adjacent a tool portion, the grip portion having an outer diameter and an internal cavity. The tool portion may have an internal cavity and may be configured to selectively receive and retain a male luer lock fitting at a first end of the cavity. A tool cap may have an outer diameter and an internal cavity. The tool cap may include a recessed portion at an end configured to selectively receive and retain a female luer lock fitting. The tool cap internal cavity may be configured to receive at least a portion of the tool portion of the tool base.

Devices and methods for assembling a luer lock fitting (e.g., fitting for use in a hemodialysis and/or a peritoneal dialysis machine) may include a luer lock tool comprising a tool base including a grip portion adjacent a tool portion, the grip portion having an outer diameter and an internal cavity. The tool portion may have an internal cavity and may be configured to selectively receive and retain a male luer lock fitting at a first end of the cavity. A tool cap may have an outer diameter and an internal cavity. The tool cap may include a recessed portion at an end configured to selectively receive and retain a female luer lock fitting. The tool cap internal cavity may be configured to receive at least a portion of the tool portion of the tool base.