How to Replace Macro Lines on Paintball Guns

by Peter Grant

Used as a plastic gas hose on paintball guns (and other applications), macro line is a thick plastic air hose that's approximately 1/8 inch in diameter. It's commonly used in paintball because of the high-pressure gas tanks used to power the paintball markers. Macro line has a small likelihood of developing leaks and can handle the high pressures of 3,000 PSI and 4,500 PSI compressed air tanks found powering most paintball markers today. If you've cracked your macro line or want to replace it with a different color, the process itself is straightforward.

Step 1

Discharge your paintball marker of any gas that may be inside its pneumatics. Disable the gas tank by turning off the valve or removing the tank entirely.

Step 2

Attempt to shoot the marker several times after removing the gas source to ensure that any compressed gas inside the marker has been expelled.

Step 3

Run your fingers along the macro line to one of the ends. Firmly push in the metal ring at the base of the macro line hose so that it becomes flush with the macro line gas fitting.

Step 4

Firmly pull the macro line out of the fitting while you are continuing to press down on the gasket at the bottom of the line.

Step 5

Repeat the previous two steps to remove the other side of the macro line hosing.

Step 6

Replace the macro line hosting by pushing in the fitting again so that it is flush against the rest of the fitting and then sliding in the macro line hose into the fitting before releasing the metal ring that was flush against the fitting.

Step 7

Repeat the above step to replace the other end of the macro line.

Step 8

Reattach the gas source to your paintball marker and activate the gas source so that it begins to flow into the marker's pneumatics. Check that the marker is not loaded. Listen for any potential leaks near the macro line gaskets after turning on the air. Reconnect the macro line hoses if you notice leaks.

Tips & Warnings

  • Depressurize your paintball marker completely before working with any of its air or pneumatics. Double-check that the marker is not loaded and that there is not a paintball hidden in the chamber of the marker while you are performing this work.