Using Pneumatic pressure to operate tools is an absolute must in your garage, but most of these tools DO NOT like excessive moisture mixed into the air. Moisture in the air lines can cause rust inside of the air lines or the tools. Excessive moisture in your air lines can cause a decrease in performance as well as premature failure of the pneumatic tool. If you’re using a paint gun it can also allow the moisture to creep into the paint gun and contaminate your paint job. We decided to put together a list of the reasons and corrections to cut down the moisture in your air lines.