The purpose of the exhaust condenser tube is to remove impurities from the air supply line. It is manufactured to exacting standards to perform equal to or better than the OEM product. The condenser tube needs to be replaced when the white material starts to turn to an off-white shade. It is serviced with a flat head screw driver; be sure to install with the arrows pointed in the right direction. It is recommended to finger tighten only. This should be checked as part of the weekly maintenance routine. Be sure new orings are used each time.