Even when restricted by 1/4in system ports, using a 3/8in hose greatly reduces resistance and increases potential flow. Don't believe us? Click the link --> Full Flow to learn more about reducing recovery times. Save Hours, save Days, save Money. Are your Tools Rated for Vacuum and Pressure? All MegaFlow Hoses are Vacuum-Rated to 20 microns and designed for high pressure refrigerants, such as R410A. This will give you the peace of mind that your tools aren't going to leak in a deep vacuum or during critical parts of the recovery process.