Air cylinders feature push-to-connect fittings for the air lines. A tube cutter is supplied with the system and is used to ensure the lines all are cut cleanly. When installing air lines, push each line only 3/8-inch into a fitting, or until there is slight resistance. From there, the line only needs 3/8-inch additional to confirm a secure fit. Whenever one or more lines are removed, air pressure must be completely vented from the system.